ID

VAR-200707-0675

CVE

CVE-2008-1447

TITLE

Multiple DNS implementations vulnerable to cache poisoning

DESCRIPTION

The DNS protocol, as implemented in (1) BIND 8 and 9 before 9.5.0-P1, 9.4.2-P1, and 9.3.5-P1; (2) Microsoft DNS in Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP1 and SP2; and other implementations allow remote attackers to spoof DNS traffic via a birthday attack that uses in-bailiwick referrals to conduct cache poisoning against recursive resolvers, related to insufficient randomness of DNS transaction IDs and source ports, aka "DNS Insufficient Socket Entropy Vulnerability" or "the Kaminsky bug.". The Microsoft Windows DNS Server is vulnerable to cache poisoning, which may allow a remote, unauthenticated attacker to cause a Windows DNS server to provide incorrect responses to DNS queries. Deficiencies in the DNS protocol and common DNS implementations facilitate DNS cache poisoning attacks. RESOLUTION The resolution is to discontinue the use of BIND/iX and migrate DNS services to another platform. =========================================================== Ubuntu Security Notice USN-627-1 July 22, 2008 dnsmasq vulnerability CVE-2008-1447 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 8.04 LTS This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 8.04 LTS: dnsmasq-base 2.41-2ubuntu2.1 After a standard system upgrade you need to restart Dnsmasq to effect the necessary changes. Details follow: Dan Kaminsky discovered weaknesses in the DNS protocol as implemented by Dnsmasq. Resolution ========== All BIND users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/bind-9.4.2_p1" Note: In order to utilize the query port randomization to mitigate the weakness, you need to make sure that your network setup allows the DNS server to use random source ports for query and that you have not set a fixed query port via the "query-source port" directive in the BIND configuration. ---------------------------------------------------------------------- 2003: 2,700 advisories published 2004: 3,100 advisories published 2005: 4,600 advisories published 2006: 5,300 advisories published How do you know which Secunia advisories are important to you? The Secunia Vulnerability Intelligence Solutions allows you to filter and structure all the information you need, so you can address issues effectively. The vulnerability is caused due to the DNS service (dns.exe) using predictable transaction values when sending out queries to upstream DNS servers. This can be exploited to poison the DNS cache via a specially crafted DNS response with a guessed transaction value when the DNS server performs a recursive lookup. SOLUTION: Apply patches. Microsoft Windows 2000 Server SP4: http://www.microsoft.com/downloads/details.aspx?FamilyId=c80fcd9b-d0f8-44db-96fc-bf2ead054ff4 Windows Server 2003 SP1/SP2: http://www.microsoft.com/downloads/details.aspx?FamilyId=ed8e2cb4-bcd9-40fc-9ad6-46b364d0656d Windows Server 2003 x64 Edition (optionally with SP2): http://www.microsoft.com/downloads/details.aspx?FamilyId=d1323e14-ffa7-4d03-a2a7-9240c192a75e Windows Server 2003 with SP1/SP2 for Itanium-based systems: http://www.microsoft.com/downloads/details.aspx?FamilyId=f3ad67de-85ad-452d-a1e0-0af3faf969d6 PROVIDED AND/OR DISCOVERED BY: The vendor credits: * Amit Klein, Trusteer. * Alla Berzroutchko, Scanit. CHANGELOG: 2007-11-14: Added link to US-CERT. Added link to Scanit. ORIGINAL ADVISORY: MS07-062 (KB941672): http://www.microsoft.com/technet/security/Bulletin/MS07-062.mspx Scanit: http://www.scanit.be/advisory-2007-11-14.html OTHER REFERENCES: US-CERT VU#484649: http://www.kb.cert.org/vuls/id/484649 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. Background ========== pdnsd is a proxy DNS server with permanent caching that is designed to cope with unreachable DNS servers. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/pdnsd < 1.2.7 >= 1.2.7 Description =========== Two issues have been reported in pdnsd: * The p_exec_query() function in src/dns_query.c does not properly handle many entries in the answer section of a DNS reply, related to a "dangling pointer bug" (CVE-2008-4194). Impact ====== An attacker could exploit the second weakness to poison the cache of pdnsd and thus spoof DNS traffic, which could e.g. The first issue can be exploited by enticing pdnsd to send a query to a malicious DNS server, or using the port randomization weakness, and might lead to a Denial of Service. Workaround ========== Port randomization can be enabled by setting the "query_port_start" option to 1024 which would resolve the CVE-2008-1447 issue. In IP NAT filtering in Sun Solaris 10 and OpenSolaris series products, when a DNS server runs NAT, it incorrectly changes the original address of the data packet. When the destination address is a DNS port, it will allow remote attackers to bypass CVE-2008 -1447 security protection. This change increases the size of the space from which an attacker has to guess values in a backwards-compatible fashion and makes successful attacks significantly more difficult. Note that this security update changes BIND network behavior in a fundamental way, and the following steps are recommended to ensure a smooth upgrade. Make sure that your network configuration is compatible with source port randomization. If you guard your resolver with a stateless packet filter, you may need to make sure that no non-DNS services listen on on the 1024--65535 UDP port range and open it at the packet filter. For instance, packet filters based on etch's Linux 2.6.18 kernel only support stateless filtering of IPv6 packets, and are therefore pose this additional difficulty. (If you use IPv4 with iptables and ESTABLISHED rules, networking changes are likely not required.) 2. Verify that the named process has been restarted and answers recursive queries. (If all queries result in timeouts, this indicates that networking changes are necessary; see the first step.) 3. Verify that source port randomization is active. Check that the /var/log/daemon.log file does not contain messages of the following form named[6106]: /etc/bind/named.conf.options:28: using specific query-source port suppresses port randomization and can be insecure. right after the "listening on IPv6 interface" and "listening on IPv4 interface" messages logged by BIND upon startup. If these messages are present, you should remove the indicated lines from the configuration, or replace the port numbers contained within them with "*" sign (e.g., replace "port 53" with "port *"). For additional certainty, use tcpdump or some other network monitoring tool to check for varying UDP source ports. If you cannot activate source port randomization, consider configuring BIND 9 to forward queries to a resolver which can, possibly over a VPN such as OpenVPN to create the necessary trusted network link. (Use BIND's forward-only mode in this case.) Other caching resolvers distributed by Debian (PowerDNS, MaraDNS, Unbound) already employ source port randomization, and no updated packages are needed. BIND 9.5 up to and including version 1:9.5.0.dfsg-4 only implements a weak form of source port randomization and needs to be updated as well. For information on BIND 8, see DSA-1604-1, and for the status of the libc stub resolver, see DSA-1605-1. The updated bind9 packages contain changes originally scheduled for the next stable point release, including the changed IP address of L.ROOT-SERVERS.NET (Debian bug #449148). For the stable distribution (etch), this problem has been fixed in version 9.3.4-2etch3. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your bind9 package. Upgrade instructions - -------------------- wget url will fetch the file for you dpkg -i file.deb will install the referenced file. If you are using the apt-get package manager, use the line for sources.list as given below: apt-get update will update the internal database apt-get upgrade will install corrected packages You may use an automated update by adding the resources from the footer to the proper configuration. Debian GNU/Linux 4.0 alias etch - ------------------------------- Debian (stable) - --------------- Stable updates are available for alpha, amd64, arm, hppa, i386, ia64, mips, mipsel, powerpc, s390 and sparc. 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Size/MD5 checksum: 95664 050d558c3d06e520fb4e6c6cebd520c3 http://security.debian.org/pool/updates/main/b/bind9/libdns22_9.3.4-2etch3_s390.deb Size/MD5 checksum: 579484 6fc80f5cde0c2d01b49ae53f027eeecc http://security.debian.org/pool/updates/main/b/bind9/libisccc0_9.3.4-2etch3_s390.deb Size/MD5 checksum: 97786 5dda64259aa80e1c2e085e7fc2430299 sparc architecture (Sun SPARC/UltraSPARC) http://security.debian.org/pool/updates/main/b/bind9/bind9_9.3.4-2etch3_sparc.deb Size/MD5 checksum: 300090 21095a9477d8db8bdbca300235ddc296 http://security.debian.org/pool/updates/main/b/bind9/lwresd_9.3.4-2etch3_sparc.deb Size/MD5 checksum: 210606 8bd074b427b5f732c5584ca265bb2c28 http://security.debian.org/pool/updates/main/b/bind9/libbind-dev_9.3.4-2etch3_sparc.deb Size/MD5 checksum: 1121664 2750abf3a8e3ffa54d1b15f6a5b6738e http://security.debian.org/pool/updates/main/b/bind9/libisccc0_9.3.4-2etch3_sparc.deb Size/MD5 checksum: 94822 4e2634cf2561a237174a6863377b24cd 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a59dbf1edb5518b09b2993049922c01a These files will probably be moved into the stable distribution on its next update. This update also switches the random number generator to Dan Bernstein's SURF. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ______________________________________________________________________________ SUSE Security Announcement Package: bind Announcement ID: SUSE-SA:2008:033 Date: Fri, 11 Jul 2008 09:00:00 +0000 Affected Products: openSUSE 10.2 openSUSE 10.3 openSUSE 11.0 SUSE SLES 9 Novell Linux Desktop 9 Open Enterprise Server Novell Linux POS 9 SUSE Linux Enterprise Desktop 10 SP1 SLE SDK 10 SP1 SLE SDK 10 SP2 SUSE Linux Enterprise Server 10 SP1 SUSE Linux Enterprise Desktop 10 SP2 SUSE Linux Enterprise Server 10 SP2 Vulnerability Type: DNS cache poisoning Severity (1-10): 9 SUSE Default Package: no Cross-References: CVE-2008-1447 Content of This Advisory: 1) Security Vulnerability Resolved: DNS cache poisoning 2) Solution or Work-Around 3) Special Instructions and Notes 4) Package Location and Checksums 5) Pending Vulnerabilities, Solutions, and Work-Arounds: 6) Authenticity Verification and Additional Information ______________________________________________________________________________ 1) Problem Description and Brief Discussion The bind daemon is responsible for resolving hostnames in IP addresses and vice versa. The new version of bind uses a random transaction-ID (TRXID) and a random UDP source-port for DNS queries to address DNS cache poisoning attacks possible because of the "birthday paradox" and an attack discovered by Dan Kaminsky. Unfortunately we do not have details about Kaminsky's attack and have to trust the statement that a random UDP source-port is sufficient to stop it. Update packages of bind9 for SLES8 will be available soon. The glibc stub resolver is known to be vulnerable too and we will publish updates as soon as possible. Note, a local attacker can always sniff DNS queries and generate spoofed responses easily. One that is authoritative only and accessible from the Internet to resolve queries for your local systems that are available over the Internet. The other system (caching) is not accessible over the Internet and can be used by internal clients to recursively lookup names and addresses. But we encourage you to install the bind update as soon as possible too. If you use the latest update of pdns-recursor you are not vulnerable to this attack. For the glibc stub resolver bug you can install a local secure DNS for- warder on your machine or make a DNS forwarder available for a protected network. 3) Special Instructions and Notes Please restart the bind daemon after the update. 4) Package Location and Checksums The preferred method for installing security updates is to use the YaST Online Update (YOU) tool. YOU detects which updates are required and automatically performs the necessary steps to verify and install them. Alternatively, download the update packages for your distribution manually and verify their integrity by the methods listed in Section 6 of this announcement. Then install the packages using the command rpm -Fhv <file.rpm> to apply the update, replacing <file.rpm> with the filename of the downloaded RPM package. x86 Platform: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-chrootenv-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-devel-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-doc-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-libs-9.4.2-39.2.i586.rpm http://download.opensuse.org/pub/opensuse/update/11.0/rpm/i586/bind-utils-9.4.2-39.2.i586.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-chrootenv-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-devel-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-doc-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-libs-9.4.1.P1-12.5.i586.rpm http://download.opensuse.org/pub/opensuse/update/10.3/rpm/i586/bind-utils-9.4.1.P1-12.5.i586.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-chrootenv-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-devel-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-doc-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-libs-9.3.5P1-0.1.i586.rpm ftp://ftp.suse.com/pub/suse/update/10.2/rpm/i586/bind-utils-9.3.5P1-0.1.i586.rpm x86-64 Platform: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/x86_64/bind-libs-32bit-9.4.2-39.2.x86_64.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/x86_64/bind-libs-32bit-9.4.1.P1-12.5.x86_64.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/x86_64/bind-libs-32bit-9.3.5P1-0.1.x86_64.rpm Sources: openSUSE 11.0: http://download.opensuse.org/pub/opensuse/update/11.0/rpm/src/bind-9.4.2-39.2.src.rpm openSUSE 10.3: http://download.opensuse.org/pub/opensuse/update/10.3/rpm/src/bind-9.4.1.P1-12.5.src.rpm openSUSE 10.2: ftp://ftp.suse.com/pub/suse/update/10.2/rpm/src/bind-9.3.5P1-0.1.src.rpm Our maintenance customers are notified individually. The packages are offered for installation from the maintenance web: Open Enterprise Server http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html Novell Linux POS 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html Novell Linux Desktop 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html SUSE SLES 9 http://support.novell.com/techcenter/psdb/aa846ea840c9bf29e6974f3b6913e550.html SUSE Linux Enterprise Server 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Server 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SLE SDK 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise 10 SP2 DEBUGINFO http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SLE SDK 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Desktop 10 SP1 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html SUSE Linux Enterprise Desktop 10 SP2 http://support.novell.com/techcenter/psdb/555065b7278085ce1ce7a6e84b6f07aa.html ______________________________________________________________________________ 5) Pending Vulnerabilities, Solutions, and Work-Arounds: none ______________________________________________________________________________ 6) Authenticity Verification and Additional Information - Announcement authenticity verification: SUSE security announcements are published via mailing lists and on Web sites. The authenticity and integrity of a SUSE security announcement is guaranteed by a cryptographic signature in each announcement. All SUSE security announcements are published with a valid signature. To verify the signature of the announcement, save it as text into a file and run the command gpg --verify <file> replacing <file> with the name of the file where you saved the announcement. The output for a valid signature looks like: gpg: Signature made <DATE> using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team <security@suse.de>" where <DATE> is replaced by the date the document was signed. If the security team's key is not contained in your key ring, you can import it from the first installation CD. To import the key, use the command gpg --import gpg-pubkey-3d25d3d9-36e12d04.asc - Package authenticity verification: SUSE update packages are available on many mirror FTP servers all over the world. While this service is considered valuable and important to the free and open source software community, the authenticity and the integrity of a package needs to be verified to ensure that it has not been tampered with. The internal rpm package signatures provide an easy way to verify the authenticity of an RPM package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, replacing <file.rpm> with the filename of the RPM package downloaded. The package is unmodified if it contains a valid signature from build@suse.de with the key ID 9C800ACA. This key is automatically imported into the RPM database (on RPMv4-based distributions) and the gpg key ring of 'root' during installation. You can also find it on the first installation CD and at the end of this announcement. - SUSE runs two security mailing lists to which any interested party may subscribe: opensuse-security@opensuse.org - General Linux and SUSE security discussion. All SUSE security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security+subscribe@opensuse.org>. opensuse-security-announce@opensuse.org - SUSE's announce-only mailing list. Only SUSE's security announcements are sent to this list. To subscribe, send an e-mail to <opensuse-security-announce+subscribe@opensuse.org>. ===================================================================== SUSE's security contact is <security@suse.com> or <security@suse.de>. The <security@suse.de> public key is listed below. ===================================================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, the clear text signature should show proof of the authenticity of the text. SUSE Linux Products GmbH provides no warranties of any kind whatsoever with respect to the information contained in this security advisory. Type Bits/KeyID Date User ID pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security@suse.de> pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build@suse.de> - -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.4.2 (GNU/Linux) mQENAzbhLQQAAAEIAKAkXHe0lWRBXLpn38hMHy03F0I4Sszmoc8aaKJrhfhyMlOA BqvklPLE2f9UrI4Xc860gH79ZREwAgPt0pi6+SleNFLNcNFAuuHMLQOOsaMFatbz JR9i4m/lf6q929YROu5zB48rBAlcfTm+IBbijaEdnqpwGib45wE/Cfy6FAttBHQh 1Kp+r/jPbf1mYAvljUfHKuvbg8t2EIQz/5yGp+n5trn9pElfQO2cRBq8LFpf1l+U P7EKjFmlOq+Gs/fF98/dP3DfniSd78LQPq5vp8RL8nr/o2i7jkAQ33m4f1wOBWd+ cZovrKXYlXiR+Bf7m2hpZo+/sAzhd7LmAD0l09kABRG0JVN1U0UgU2VjdXJpdHkg VGVhbSA8c2VjdXJpdHlAc3VzZS5kZT6JARUDBRA24S1H5Fiyh7HKPEUBAVcOB/9b yHYji1/+4Xc2GhvXK0FSJN0MGgeXgW47yxDL7gmR4mNgjlIOUHZj0PEpVjWepOJ7 tQS3L9oP6cpj1Fj/XxuLbkp5VCQ61hpt54coQAvYrnT9rtWEGN+xmwejT1WmYmDJ xG+EGBXKr+XP69oIUl1E2JO3rXeklulgjqRKos4cdXKgyjWZ7CP9V9daRXDtje63 Om8gwSdU/nCvhdRIWp/Vwbf7Ia8iZr9OJ5YuQl0DBG4qmGDDrvImgPAFkYFzwlqo choXFQ9y0YVCV41DnR+GYhwl2qBd81T8aXhihEGPIgaw3g8gd8B5o6mPVgl+nJqI BkEYGBusiag2pS6qwznZiQEVAwUQNuEtBHey5gA9JdPZAQFtOAf+KVh939b0J94u v/kpg4xs1LthlhquhbHcKNoVTNspugiC3qMPyvSX4XcBr2PC0cVkS4Z9PY9iCfT+ x9WM96g39dAF+le2CCx7XISk9XXJ4ApEy5g4AuK7NYgAJd39PPbERgWnxjxir9g0 Ix30dS30bW39D+3NPU5Ho9TD/B7UDFvYT5AWHl3MGwo3a1RhTs6sfgL7yQ3U+mvq MkTExZb5mfN1FeaYKMopoI4VpzNVeGxQWIz67VjJHVyUlF20ekOz4kWVgsxkc8G2 saqZd6yv2EwqYTi8BDAduweP33KrQc4KDDommQNDOXxaKOeCoESIdM4p7Esdjq1o L0oixF12CohGBBARAgAGBQI7HmHDAAoJEJ5A4xAACqukTlQAoI4QzP9yjPohY7OU F7J3eKBTzp25AJ42BmtSd3pvm5ldmognWF3Trhp+GYkAlQMFEDe3O8IWkDf+zvyS FQEBAfkD/3GG5UgJj18UhYmh1gfjIlDcPAeqMwSytEHDENmHC+vlZQ/p0mT9tPiW tp34io54mwr+bLPN8l6B5GJNkbGvH6M+mO7R8Lj4nHL6pyAv3PQr83WyLHcaX7It Klj371/4yzKV6qpz43SGRK4MacLo2rNZ/dNej7lwPCtzCcFYwqkiiEYEEBECAAYF AjoaQqQACgkQx1KqMrDf94ArewCfWnTUDG5gNYkmHG4bYL8fQcizyA4An2eVo/n+ 3J2KRWSOhpAMsnMxtPbBmQGiBDnu9IERBACT8Y35+2vv4MGVKiLEMOl9GdST6MCk YS3yEKeueNWc+z/0Kvff4JctBsgs47tjmiI9sl0eHjm3gTR8rItXMN6sJEUHWzDP +Y0PFPboMvKx0FXl/A0dM+HFrruCgBlWt6FA+okRySQiliuI5phwqkXefl9AhkwR 8xocQSVCFxcwvwCglVcOQliHu8jwRQHxlRE0tkwQQI0D+wfQwKdvhDplxHJ5nf7U 8c/yE/vdvpN6lF0tmFrKXBUX+K7u4ifrZlQvj/81M4INjtXreqDiJtr99Rs6xa0S cZqITuZC4CWxJa9GynBED3+D2t1V/f8l0smsuYoFOF7Ib49IkTdbtwAThlZp8bEh ELBeGaPdNCcmfZ66rKUdG5sRA/9ovnc1krSQF2+sqB9/o7w5/q2qiyzwOSTnkjtB UVKn4zLUOf6aeBAoV6NMCC3Kj9aZHfA+ND0ehPaVGJgjaVNFhPi4x0e7BULdvgOo AqajLfvkURHAeSsxXIoEmyW/xC1sBbDkDUIBSx5oej73XCZgnj/inphRqGpsb+1n KFvF+rQoU3VTRSBQYWNrYWdlIFNpZ25pbmcgS2V5IDxidWlsZEBzdXNlLmRlPohi BBMRAgAiBQJA2AY+AhsDBQkObd+9BAsHAwIDFQIDAxYCAQIeAQIXgAAKCRCoTtro nIAKypCfAJ9RuZ6ZSV7QW4pTgTIxQ+ABPp0sIwCffG9bCNnrETPlgOn+dGEkAWeg KL+IRgQQEQIABgUCOnBeUgAKCRCeQOMQAAqrpNzOAKCL512FZvv4VZx94TpbA9lx yoAejACeOO1HIbActAevk5MUBhNeLZa/qM2JARUDBRA6cGBvd7LmAD0l09kBATWn B/9An5vfiUUE1VQnt+T/EYklES3tXXaJJp9pHMa4fzFa8jPVtv5UBHGee3XoUNDV wM2OgSEISZxbzdXGnqIlcT08TzBUD9i579uifklLsnr35SJDZ6ram51/CWOnnaVh UzneOA9gTPSr+/fT3WeVnwJiQCQ30kNLWVXWATMnsnT486eAOlT6UNBPYQLpUprF 5Yryk23pQUPAgJENDEqeU6iIO9Ot1ZPtB0lniw+/xCi13D360o1tZDYOp0hHHJN3 D3EN8C1yPqZd5CvvznYvB6bWBIpWcRgdn2DUVMmpU661jwqGlRz1F84JG/xe4jGu zgpJt9IXSzyohEJB6XG5+D0BuQINBDnu9JIQCACEkdBN6Mxf5WvqDWkcMRy6wnrd 9DYJ8UUTmIT2iQf07tRUKJJ9v0JXfx2Z4d08IQSMNRaq4VgSe+PdYgIy0fbj23Vi a5/gO7fJEpD2hd2f+pMnOWvH2rOOIbeYfuhzAc6BQjAKtmgR0ERUTafTM9Wb6F13 CNZZNZfDqnFDP6L12w3z3F7FFXkz07Rs3AIto1ZfYZd4sCSpMr/0S5nLrHbIvGLp 271hhQBeRmmoGEKO2JRelGgUJ2CUzOdtwDIKT0LbCpvaP8PVnYF5IFoYJIWRHqlE t5ucTXstZy7vYjL6vTP4l5xs+LIOkNmPhqmfsgLzVo0UaLt80hOwc4NvDCOLAAMG B/9g+9V3ORzw4LvO1pwRYJqfDKUq/EJ0rNMMD4N8RLpZRhKHKJUm9nNHLbksnlZw rbSTM5LpC/U6sheLP+l0bLVoq0lmsCcUSyh+mY6PxWirLIWCn/IAZAGnXb6Zd6Tt IJlGG6pqUN8QxGJYQnonl0uTJKHJENbI9sWHQdcTtBMc34gorHFCo1Bcvpnc1LFL rWn7mfoGx6INQjf3HGQpMXAWuSBQhzkazY6vaWFpa8bBJ+gKbBuySWzNm3rFtT5H RKMWpO+M9bHp4d+puY0L1YwN1OMatcMMpcWnZpiWiR83oi32+xtWUY2U7Ae38mMa g8zFbpeqPQUsDv9V7CAJ1dbriEwEGBECAAwFAkDYBnoFCQ5t3+gACgkQqE7a6JyA CspnpgCfRbYwxT3iq+9l/PgNTUNTZOlof2oAn25y0eGi0371jap9kOV6uq71sUuO =ypVs - -----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iQEVAwUBSHcSHHey5gA9JdPZAQIS1ggAgWjpLx2C50WD5sqyPhPuc7+qs+xcz4ZX x8P5AEGQGIywJiYB0gfEXjw+0kOXRTl920nHPkFn5+QsKSo/REN8WpcejXmHOEJ4 O+DVC4MCII3lqKJrwtlj/TXueUjWnP3Im80vI8yRU9otNttYW/vfMyGvYBquAzyn jugTiRaxBdt5nEkw3a+LGNJA6zrJqJNupI9mJXruC2rneoNKV+ReL5gO4ObSzDjI +wzhadmUrTsmJKHd1wHpj2OMZCmrBscOu4wDxgaD6UOQQ0QgTdlGowsVpxm2ehv+ HfaC67ENCtTo6RbLP94NLxBP6gAWnLADOs+TmWx0FXfAZZnzYEk1Pw== =iToU -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ . Release Date: 2008-07-16 Last Updated: 2008-07-19 Potential Security Impact: Remote DNS cache poisoning Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY A potential security vulnerability has been identified with HP-UX running BIND. References: CVE-2008-1447 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.11, B.11.23, B.11.31 running BIND v9.3.2 or BIND v9.2.0 BACKGROUND CVSS 2.0 Base Metrics =============================================== Reference Base Vector Base Score CVE-2008-1447 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 =============================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002. RESOLUTION HP has provided the following software updates to resolve the vulnerabilities. The BIND v9.2.0 updates are available for download from: ftp://ss080058:ss080058@hprc.external.hp.com HP-UX Release - B.11.11 running v9.2.0 BIND Depot name - BIND920v11.tape.depot MD5 Sum - 3b1df46244cb82789498034c31e9c7ef HP-UX Release - B.11.23 running v9.2.0 BIND Depot name - PHNE_37865.depot MD5 Sum - 090356b6c94d9ad3559ae0cf6a7cce6c The BIND v9.3.2 updates are available for download from http://software.hp.com . HP-UX Release - B.11.11 running v9.3.2 - Install revision C.9.3.2.3.0 or subsequent HP-UX Release - B.11.23 running v9.3.2 - Install revision C.9.3.2.3.0 or subsequent HP-UX Release - B.11.31 running v9.3.2 - Install revision C.9.3.2.3.0 or subsequent MANUAL ACTIONS: Yes - NonUpdate For B.11.11 running v9.2.0 install BIND920v11.tape.depot For B.11.23 running v9.2.0 install PHNE_37865.depot PRODUCT SPECIFIC INFORMATION HP-UX Software Assistant: HP-UX Software Assistant is an enhanced application that replaces HP-UX Security Patch Check. It analyzes all HP-issued Security Bulletins and lists recommended actions that may apply to a specific HP-UX system. It can also download patches and create a depot automatically. For more information see: https://www.hp.com/go/swa AFFECTED VERSIONS For BIND v9.3.2 HP-UX B.11.11 ============= BindUpgrade.BIND-UPGRADE action: install revision C.9.3.2.3.0 or subsequent URL: http://software.hp.com HP-UX B.11.23 ============= BindUpgrade.BIND-UPGRADE BindUpgrade.BIND2-UPGRADE action: install revision C.9.3.2.3.0 or subsequent URL: http://software.hp.com HP-UX B.11.31 ============= NameService.BIND-AUX NameService.BIND-RUN action: install revision C.9.3.2.3.0 or subsequent URL: http://software.hp.com For BIND v9.2.0 HP-UX B.11.11 ============= BINDv920.INETSVCS-BIND action: install revision B.11.11.01.011 or subsequent URL: ftp://ss080058:ss080058@hprc.external.hp.com HP-UX B.11.23 ============= InternetSrvcs.INETSVCS-INETD InternetSrvcs.INETSVCS-RUN InternetSrvcs.INETSVCS2-RUN action: install patch PHNE_37865 or subsequent URL: ftp://ss080058:ss080058@hprc.external.hp.com END AFFECTED VERSIONS HISTORY Version:1 (rev.1) - 16 July 2008 Initial release Version:2 (rev.2) - 19 July 2008 Added BIND v9.2.0 depot information Third Party Security Patches: Third party security patches that are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy. Support: For further information, contact normal HP Services support channel. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. To get the security-alert PGP key, please send an e-mail message as follows: To: security-alert@hp.com Subject: get key Subscribe: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC On the web page: ITRC security bulletins and patch sign-up Under Step1: your ITRC security bulletins and patches - check ALL categories for which alerts are required and continue. Under Step2: your ITRC operating systems - verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page: Subscriber's choice for Business: sign-in. On the web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. To review previously published Security Bulletins visit: http://www.itrc.hp.com/service/cki/secBullArchive.do * The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number in the title: GN = HP General SW MA = HP Management Agents MI = Misc. 3rd Party SW MP = HP MPE/iX NS = HP NonStop Servers OV = HP OpenVMS PI = HP Printing & Imaging ST = HP Storage SW TL = HP Trusted Linux TU = HP Tru64 UNIX UX = HP-UX VV = HP VirtualVault System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." \xa9Copyright 2008 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental, special or consequential damages including downtime cost; lost profits; damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 National Cyber Alert System Technical Cyber Security Alert TA08-190B Multiple DNS implementations vulnerable to cache poisoning Original release date: July 08, 2008 Last revised: -- Source: US-CERT Systems Affected Systems implementing: * Caching DNS resolvers * DNS stub resolvers Affected systems include both client and server systems, and any other networked systems that include this functionality. Effective attack techniques against these vulnerabilities have been demonstrated. I. Examples of these vulnerabilities can be found in Vulnerability Note VU#800113. Recent research into these and other related vulnerabilities has produced extremely effective exploitation methods to achieve cache poisoning. Tools and techniques have been developed that can reliably poison a domain of the attacker's choosing on most current implementations. As a result, the consensus of DNS software implementers is to implement source port randomization in their resolvers as a mitigation. US-CERT is tracking this issue as VU#800113. This reference number corresponds to CVE-2008-1447. II. Impact An attacker with the ability to conduct a successful cache poisoning attack can cause a nameserver's clients to contact the incorrect, and possibly malicious, hosts for particular services. Consequently, web traffic, email, and other important network data can be redirected to systems under the attacker's control. III. Solution Apply a patch from your vendor Patches have been released by a number of vendors to implement source port randomization in the nameserver. This change significantly reduces the practicality of cache poisoning attacks. Please see the Systems Affected section of Vulnerability Note VU#800113 for additional details for specific vendors. As mentioned above, stub resolvers are also vulnerable to these attacks. Stub resolvers that will issue queries in response to attacker behavior, and may receive packets from an attacker, should be patched. System administrators should be alert for patches to client operating systems that implement port randomization in the stub resolver. Workarounds Restrict access Administrators, particularly those who are unable to apply a patch, can limit exposure to this vulnerability by restricting sources that can ask for recursion. Note that restricting access will still allow attackers with access to authorized hosts to exploit this vulnerability. Filter traffic at network perimeters Because the ability to spoof IP addresses is necessary to conduct these attacks, administrators should take care to filter spoofed addresses at the network perimeter. IETF Request for Comments (RFC) documents RFC 2827, RFC 3704, and RFC 3013 describe best current practices (BCPs) for implementing this defense. It is important to understand your network's configuration and service requirements before deciding what changes are appropriate. Run a local DNS cache In lieu of strong port randomization characteristics in a stub resolver, administrators can protect their systems by using local caching full-service resolvers, both on the client systems and on servers that are topologically close on the network to the client systems. This should be done in conjunction with the network segmentation and filtering strategies mentioned above. Disable recursion Disable recursion on any nameserver responding to DNS requests made by untrusted systems. Implement source port randomization Vendors that implement DNS software are encouraged to review IETF Internet Draft, "Measures for making DNS more resilient against forged answers," for additional information about implementing mitigations in their products. This document is a work in progress and may change prior to its publication as an RFC, if it is approved. IV. References * US-CERT Vulnerability Note VU#800113 - <http://www.kb.cert.org/vuls/id/800113> * US-CERT Vulnerability Note VU#484649 - <http://www.kb.cert.org/vuls/id/484649> * US-CERT Vulnerability Note VU#252735 - <http://www.kb.cert.org/vuls/id/252735> * US-CERT Vulnerability Note VU#927905 - <http://www.kb.cert.org/vuls/id/927905> * US-CERT Vulnerability Note VU#457875 - <http://www.kb.cert.org/vuls/id/457875> * Internet Draft: Measures for making DNS more resilient against forged answers - <http://tools.ietf.org/html/draft-ietf-dnsext-forgery-resilience> * RFC 3833 - <http://tools.ietf.org/html/rfc3833> * RFC 2827 - <http://tools.ietf.org/html/rfc2827> * RFC 3704 - <http://tools.ietf.org/html/rfc3704> * RFC 3013 - <http://tools.ietf.org/html/rfc3013> * Microsoft Security Bulletin MS08-037 - <http://www.microsoft.com/technet/security/bulletin/ms08-037.mspx> * Internet Systems Consortium BIND Vulnerabilities - <http://www.isc.org/sw/bind/bind-security.php> ____________________________________________________________________ US-CERT thanks Dan Kaminsky of IOActive and Paul Vixie of Internet Systems Consortium (ISC) for notifying us about this problem and for helping us to construct this advisory. ____________________________________________________________________ The most recent version of this document can be found at: <http://www.us-cert.gov/cas/techalerts/TA08-190B.html> ____________________________________________________________________ Feedback can be directed to US-CERT Technical Staff. ____________________________________________________________________ Produced 2008 by US-CERT, a government organization. There are two ways to deal with this situation: 1. The documentation included with BIND 9 contains a migration guide. Configure the BIND 8 resolver to forward queries to a BIND 9 resolver. Provided that the network between both resolvers is trusted, this protects the BIND 8 resolver from cache poisoning attacks (to the same degree that the BIND 9 resolver is protected). This problem does not apply to BIND 8 when used exclusively as an authoritative DNS server. BIND 8 (that is, the bind package) will be removed from the etch distribution in a future point release. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201209-25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: VMware Player, Server, Workstation: Multiple vulnerabilities Date: September 29, 2012 Bugs: #213548, #224637, #236167, #245941, #265139, #282213, #297367, #335866, #385727 ID: 201209-25 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in VMware Player, Server, and Workstation, allowing remote and local attackers to conduct several attacks, including privilege escalation, remote execution of arbitrary code, and a Denial of Service. Background ========== VMware Player, Server, and Workstation allow emulation of a complete PC on a PC without the usual performance overhead of most emulators. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-emulation/vmware-player <= 2.5.5.328052 Vulnerable! 2 app-emulation/vmware-workstation <= 6.5.5.328052 Vulnerable! 3 app-emulation/vmware-server <= 1.0.9.156507 Vulnerable! ------------------------------------------------------------------- NOTE: Certain packages are still vulnerable. Users should migrate to another package if one is available or wait for the existing packages to be marked stable by their architecture maintainers. ------------------------------------------------------------------- 3 affected packages Description =========== Multiple vulnerabilities have been discovered in VMware Player, Server, and Workstation. Please review the CVE identifiers referenced below for details. Impact ====== Local users may be able to gain escalated privileges, cause a Denial of Service, or gain sensitive information. A remote attacker could entice a user to open a specially crafted file, possibly resulting in the remote execution of arbitrary code, or a Denial of Service. Remote attackers also may be able to spoof DNS traffic, read arbitrary files, or inject arbitrary web script to the VMware Server Console. Furthermore, guest OS users may be able to execute arbitrary code on the host OS, gain escalated privileges on the guest OS, or cause a Denial of Service (crash the host OS). Workaround ========== There is no known workaround at this time. Resolution ========== Gentoo discontinued support for VMware Player. We recommend that users unmerge VMware Player: # emerge --unmerge "app-emulation/vmware-player" NOTE: Users could upgrade to ">=app-emulation/vmware-player-3.1.5", however these packages are not currently stable. Gentoo discontinued support for VMware Workstation. We recommend that users unmerge VMware Workstation: # emerge --unmerge "app-emulation/vmware-workstation" NOTE: Users could upgrade to ">=app-emulation/vmware-workstation-7.1.5", however these packages are not currently stable. Gentoo discontinued support for VMware Server. We recommend that users unmerge VMware Server: # emerge --unmerge "app-emulation/vmware-server" References ========== [ 1 ] CVE-2007-5269 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5269 [ 2 ] CVE-2007-5503 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5503 [ 3 ] CVE-2007-5671 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5671 [ 4 ] CVE-2008-0967 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-0967 [ 5 ] CVE-2008-1340 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1340 [ 6 ] CVE-2008-1361 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1361 [ 7 ] CVE-2008-1362 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1362 [ 8 ] CVE-2008-1363 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1363 [ 9 ] CVE-2008-1364 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1364 [ 10 ] CVE-2008-1392 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1392 [ 11 ] CVE-2008-1447 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1447 [ 12 ] CVE-2008-1806 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1806 [ 13 ] CVE-2008-1807 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1807 [ 14 ] CVE-2008-1808 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-1808 [ 15 ] CVE-2008-2098 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-2098 [ 16 ] CVE-2008-2100 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-2100 [ 17 ] CVE-2008-2101 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-2101 [ 18 ] CVE-2008-4915 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-4915 [ 19 ] CVE-2008-4916 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-4916 [ 20 ] CVE-2008-4917 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-4917 [ 21 ] CVE-2009-0040 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-0040 [ 22 ] CVE-2009-0909 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-0909 [ 23 ] CVE-2009-0910 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-0910 [ 24 ] CVE-2009-1244 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-1244 [ 25 ] CVE-2009-2267 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-2267 [ 26 ] CVE-2009-3707 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3707 [ 27 ] CVE-2009-3732 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3732 [ 28 ] CVE-2009-3733 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-3733 [ 29 ] CVE-2009-4811 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2009-4811 [ 30 ] CVE-2010-1137 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1137 [ 31 ] CVE-2010-1138 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1138 [ 32 ] CVE-2010-1139 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1139 [ 33 ] CVE-2010-1140 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1140 [ 34 ] CVE-2010-1141 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1141 [ 35 ] CVE-2010-1142 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1142 [ 36 ] CVE-2010-1143 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1143 [ 37 ] CVE-2011-3868 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3868 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201209-25.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ======= Copyright 2012 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5 . Scott Kitterman noted that python-dns is vulnerable to this predictability, as it randomizes neither its transaction ID nor its source port. Taken together, this lack of entropy leaves applications using python-dns to perform DNS queries highly susceptible to response forgery. The Common Vulnerabilities and Exposures project identifies this class of weakness as CVE-2008-1447. Corrected: 2008-07-12 10:07:33 UTC (RELENG_6, 6.3-STABLE) 2008-07-13 18:42:38 UTC (RELENG_6_3, 6.3-RELEASE-p3) 2008-07-13 18:42:38 UTC (RELENG_7, 7.0-STABLE) 2008-07-13 18:42:38 UTC (RELENG_7_0, 7.0-RELEASE-p3) CVE Name: CVE-2008-1447 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. Background BIND 9 is an implementation of the Domain Name System (DNS) protocols. The named(8) daemon is an Internet Domain Name Server. DNS requests contain a query id which is used to match a DNS request with the response and to make it harder for anybody but the DNS server which received the request to send a valid response. This allows the attacker to influence or control the results of DNS queries being returned to users from target systems. To limit the machines able to perform recursive queries, add an ACL in named.conf and limit recursion like the following: acl example-acl { 192.0.2.0/24; }; options { recursion yes; allow-recursion { example-acl; }; }; V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 6-STABLE or 7-STABLE, or to the RELENG_7_0 or RELENG_6_3 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 6.3 and 7.0 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 6.3] # fetch http://security.FreeBSD.org/patches/SA-08:06/bind63.patch # fetch http://security.FreeBSD.org/patches/SA-08:06/bind63.patch.asc [FreeBSD 7.0] # fetch http://security.FreeBSD.org/patches/SA-08:06/bind7.patch # fetch http://security.FreeBSD.org/patches/SA-08:06/bind7.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/lib/bind # make obj && make depend && make && make install # cd /usr/src/usr.sbin/named # make obj && make depend && make && make install NOTE WELL: This update causes BIND to choose a new, random UDP port for each new query; this may cause problems for some network configurations, particularly if firewall(s) block incoming UDP packets on particular ports. The avoid-v4-udp-ports and avoid-v6-udp-ports options should be used to avoid selecting random port numbers within a blocked range. NOTE WELL: If a port number is specified via the query-source or query-source-v6 options to BIND, randomized port selection will not be used. Consequently it is strongly recommended that these options not be used to specify fixed port numbers. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_6 src/contrib/bind9/bin/named/client.c 1.1.1.2.2.5 src/contrib/bind9/bin/named/server.c 1.1.1.2.2.4 src/contrib/bind9/lib/dns/api 1.1.1.2.2.5 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.1.4.4 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.1.4.3 src/contrib/bind9/lib/dns/resolver.c 1.1.1.2.2.8 RELENG_6_3 src/UPDATING 1.416.2.37.2.8 src/sys/conf/newvers.sh 1.69.2.15.2.7 src/contrib/bind9/bin/named/client.c 1.1.1.2.2.3.2.1 src/contrib/bind9/bin/named/server.c 1.1.1.2.2.2.2.1 src/contrib/bind9/lib/dns/api 1.1.1.2.2.3.2.1 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.1.4.2.2.1 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.1.4.1.2.1 src/contrib/bind9/lib/dns/resolver.c 1.1.1.2.2.6.2.1 RELENG_7 src/contrib/bind9/bin/named/client.c 1.1.1.6.2.2 src/contrib/bind9/bin/named/server.c 1.1.1.6.2.2 src/contrib/bind9/lib/dns/api 1.1.1.6.2.2 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.4.2.2 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.3.2.2 src/contrib/bind9/lib/dns/resolver.c 1.1.1.9.2.2 RELENG_7_0 src/UPDATING 1.507.2.3.2.7 src/sys/conf/newvers.sh 1.72.2.5.2.7 src/contrib/bind9/bin/named/client.c 1.1.1.6.2.1.2.1 src/contrib/bind9/bin/named/server.c 1.1.1.6.2.1.2.1 src/contrib/bind9/lib/dns/api 1.1.1.6.2.1.2.1 src/contrib/bind9/lib/dns/dispatch.c 1.1.1.4.2.1.2.1 src/contrib/bind9/lib/dns/include/dns/dispatch.h 1.1.1.3.2.1.2.1 src/contrib/bind9/lib/dns/resolver.c 1.1.1.9.2.1.2.1 - ------------------------------------------------------------------------- VII

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

security feature problem

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES