ID

VAR-201403-0275

CVE

CVE-2014-2532

TITLE

OpenSSH of sshd Vulnerabilities that can circumvent environmental restrictions

DESCRIPTION

sshd in OpenSSH before 6.6 does not properly support wildcards on AcceptEnv lines in sshd_config, which allows remote attackers to bypass intended environment restrictions by using a substring located before a wildcard character. OpenSSH is prone to a security-bypass vulnerability. An attacker can exploit this issue to bypass certain security restrictions and perform unauthorized actions. This may lead to further attacks. Versions prior to OpenSSH 6.6 are vulnerable. Here are the details from the Slackware 14.1 ChangeLog: +--------------------------+ patches/packages/openssh-6.6p1-i486-1_slack14.1.txz: Upgraded. This update fixes a security issue when using environment passing with a sshd_config(5) AcceptEnv pattern with a wildcard. For more information, see: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2532 (* Security fix *) +--------------------------+ Where to find the new packages: +-----------------------------+ Thanks to the friendly folks at the OSU Open Source Lab (http://osuosl.org) for donating FTP and rsync hosting to the Slackware project! :-) Also see the "Get Slack" section on http://slackware.com for additional mirror sites near you. Updated package for Slackware 13.0: ftp://ftp.slackware.com/pub/slackware/slackware-13.0/patches/packages/openssh-5.9p1-i486-1_slack13.0.txz Updated package for Slackware x86_64 13.0: ftp://ftp.slackware.com/pub/slackware/slackware64-13.0/patches/packages/openssh-5.9p1-x86_64-1_slack13.0.txz Updated package for Slackware 13.1: ftp://ftp.slackware.com/pub/slackware/slackware-13.1/patches/packages/openssh-5.9p1-i486-1_slack13.1.txz Updated package for Slackware x86_64 13.1: ftp://ftp.slackware.com/pub/slackware/slackware64-13.1/patches/packages/openssh-5.9p1-x86_64-1_slack13.1.txz Updated package for Slackware 13.37: ftp://ftp.slackware.com/pub/slackware/slackware-13.37/patches/packages/openssh-5.9p1-i486-3_slack13.37.txz Updated package for Slackware x86_64 13.37: ftp://ftp.slackware.com/pub/slackware/slackware64-13.37/patches/packages/openssh-5.9p1-x86_64-3_slack13.37.txz Updated package for Slackware 14.0: ftp://ftp.slackware.com/pub/slackware/slackware-14.0/patches/packages/openssh-6.6p1-i486-1_slack14.0.txz Updated package for Slackware x86_64 14.0: ftp://ftp.slackware.com/pub/slackware/slackware64-14.0/patches/packages/openssh-6.6p1-x86_64-1_slack14.0.txz Updated package for Slackware 14.1: ftp://ftp.slackware.com/pub/slackware/slackware-14.1/patches/packages/openssh-6.6p1-i486-1_slack14.1.txz Updated package for Slackware x86_64 14.1: ftp://ftp.slackware.com/pub/slackware/slackware64-14.1/patches/packages/openssh-6.6p1-x86_64-1_slack14.1.txz Updated package for Slackware -current: ftp://ftp.slackware.com/pub/slackware/slackware-current/slackware/n/openssh-6.6p1-i486-1.txz Updated package for Slackware x86_64 -current: ftp://ftp.slackware.com/pub/slackware/slackware64-current/slackware64/n/openssh-6.6p1-x86_64-1.txz MD5 signatures: +-------------+ Slackware 13.0 package: 0729d3be6a1886c2462522110333abc0 openssh-5.9p1-i486-1_slack13.0.txz Slackware x86_64 13.0 package: a474f048de648347207bacb21b5f8f28 openssh-5.9p1-x86_64-1_slack13.0.txz Slackware 13.1 package: 8df387cdf44f359a9de7c3e40ea321c6 openssh-5.9p1-i486-1_slack13.1.txz Slackware x86_64 13.1 package: e7eb361401849bbcfb0e20ea17181836 openssh-5.9p1-x86_64-1_slack13.1.txz Slackware 13.37 package: 8404668d896f81b44ddd5e6e2985f590 openssh-5.9p1-i486-3_slack13.37.txz Slackware x86_64 13.37 package: b50bb951453824e53dcddbdf1d571561 openssh-5.9p1-x86_64-3_slack13.37.txz Slackware 14.0 package: 755d1ec29f80ac40636741ddf618715a openssh-6.6p1-i486-1_slack14.0.txz Slackware x86_64 14.0 package: cc74307ab8875a8fa04a87f18b0cd216 openssh-6.6p1-x86_64-1_slack14.0.txz Slackware 14.1 package: 1dcb917e01fa83d1cabd59378c81dd32 openssh-6.6p1-i486-1_slack14.1.txz Slackware x86_64 14.1 package: dfb1f98206ce1e2300fea647a5281486 openssh-6.6p1-x86_64-1_slack14.1.txz Slackware -current package: 7a5f7c123c397d040fff868afbf86e8b n/openssh-6.6p1-i486-1.txz Slackware x86_64 -current package: e6d3cced2c7c9e642d8982b27295a408 n/openssh-6.6p1-x86_64-1.txz Installation instructions: +------------------------+ Upgrade the package as root: # upgradepkg openssh-6.6p1-i486-1_slack14.1.txz Next, restart the sshd daemon: # sh /etc/rc.d/rc.sshd restart +-----+ Slackware Linux Security Team http://slackware.com/gpg-key security@slackware.com +------------------------------------------------------------------------+ | To leave the slackware-security mailing list: | +------------------------------------------------------------------------+ | Send an email to majordomo@slackware.com with this text in the body of | | the email message: | | | | unsubscribe slackware-security | | | | You will get a confirmation message back containing instructions to | | complete the process. Please do not reply to this email address. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201405-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: OpenSSH: Multiple vulnerabilities Date: May 11, 2014 Bugs: #231292, #247466, #386307, #410869, #419357, #456006, #505066 ID: 201405-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities have been found in OpenSSH, the worst of which may allow remote attackers to execute arbitrary code. Background ========== OpenSSH is a complete SSH protocol implementation that includes an SFTP client and server support. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/openssh < 6.6_p1-r1 >= 6.6_p1-r1 Description =========== Multiple vulnerabilities have been discovered in OpenSSH. Please review the CVE identifiers referenced below for details. Impact ====== A remote attacker could execute arbitrary code, cause a Denial of Service condition, obtain sensitive information, or bypass environment restrictions. Workaround ========== There is no known workaround at this time. Resolution ========== All OpenSSH users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/openssh-6.6_p1-r1" NOTE: One or more of the issues described in this advisory have been fixed in previous updates. They are included in this advisory for the sake of completeness. It is likely that your system is already no longer affected by them. References ========== [ 1 ] CVE-2008-5161 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2008-5161 [ 2 ] CVE-2010-4478 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-4478 [ 3 ] CVE-2010-4755 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2010-4755 [ 4 ] CVE-2010-5107 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-5107 [ 5 ] CVE-2011-5000 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-5000 [ 6 ] CVE-2012-0814 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-0814 [ 7 ] CVE-2014-2532 http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-2532 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201405-06.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 2014 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 . _______________________________________________________________________ References: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2532 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-2653 http://advisories.mageia.org/MGASA-2014-0143.html http://advisories.mageia.org/MGASA-2014-0166.html _______________________________________________________________________ Updated Packages: Mandriva Business Server 1/X86_64: 753bd40deb60429adc6a7c1afd63ee3d mbs1/x86_64/openssh-5.9p1-6.3.mbs1.x86_64.rpm 377e7fbb14f72a1e32da41f19be7baa8 mbs1/x86_64/openssh-askpass-5.9p1-6.3.mbs1.x86_64.rpm a906db623fc8d56eab9b8b99b1af84d9 mbs1/x86_64/openssh-askpass-common-5.9p1-6.3.mbs1.x86_64.rpm 9fc03d4929efdf21a26aef308eb66f14 mbs1/x86_64/openssh-askpass-gnome-5.9p1-6.3.mbs1.x86_64.rpm f2dbea4a0a8109bc835c69e871f07a69 mbs1/x86_64/openssh-clients-5.9p1-6.3.mbs1.x86_64.rpm a20d329b8332ff7f7f10dd541a3865a9 mbs1/x86_64/openssh-server-5.9p1-6.3.mbs1.x86_64.rpm 0fd2c0a9338a7e8e8747c2ea3ae43c49 mbs1/SRPMS/openssh-5.9p1-6.3.mbs1.src.rpm _______________________________________________________________________ To upgrade automatically use MandrivaUpdate or urpmi. The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 - ------------------------------------------------------------------------- Debian Security Advisory DSA-2894-1 security@debian.org http://www.debian.org/security/ Salvatore Bonaccorso April 05, 2014 http://www.debian.org/security/faq - ------------------------------------------------------------------------- Package : openssh CVE ID : CVE-2014-2532 CVE-2014-2653 Debian Bug : 742513 Two vulnerabilities were discovered in OpenSSH, an implementation of the SSH protocol suite. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2014-2532 Jann Horn discovered that OpenSSH incorrectly handled wildcards in AcceptEnv lines. CVE-2014-2653 Matthew Vernon reported that if a SSH server offers a HostCertificate that the ssh client doesn't accept, then the client doesn't check the DNS for SSHFP records. As a consequence a malicious server can disable SSHFP-checking by presenting a certificate. Note that a host verification prompt is still displayed before connecting. For the oldstable distribution (squeeze), these problems have been fixed in version 1:5.5p1-6+squeeze5. For the stable distribution (wheezy), these problems have been fixed in version 1:6.0p1-4+deb7u1. For the unstable distribution (sid), these problems have been fixed in version 1:6.6p1-1. We recommend that you upgrade your openssh packages. ============================================================================ Ubuntu Security Notice USN-2155-1 March 25, 2014 openssh vulnerability ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 13.10 - Ubuntu 12.10 - Ubuntu 12.04 LTS - Ubuntu 10.04 LTS Summary: OpenSSH incorrectly handled environment restrictions with wildcards. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 13.10: openssh-server 1:6.2p2-6ubuntu0.2 Ubuntu 12.10: openssh-server 1:6.0p1-3ubuntu1.1 Ubuntu 12.04 LTS: openssh-server 1:5.9p1-5ubuntu1.2 Ubuntu 10.04 LTS: openssh-server 1:5.3p1-3ubuntu7.1 In general, a standard system update will make all the necessary changes. References: http://www.ubuntu.com/usn/usn-2155-1 CVE-2014-2532 Package Information: https://launchpad.net/ubuntu/+source/openssh/1:6.2p2-6ubuntu0.2 https://launchpad.net/ubuntu/+source/openssh/1:6.0p1-3ubuntu1.1 https://launchpad.net/ubuntu/+source/openssh/1:5.9p1-5ubuntu1.2 https://launchpad.net/ubuntu/+source/openssh/1:5.3p1-3ubuntu7.1 . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Note: the current version of the following document is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/ docDisplay?docId=emr_na-c04499681 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c04499681 Version: 1 HPSBUX03188 SSRT101487 rev.1 - HP-UX running HP Secure Shell, Remote Denial of Service (DoS) and other Vulnerabilities NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2014-11-07 Last Updated: 2014-11-07 Potential Security Impact: Remote Denial of Service (DoS) and other vulnerabilities Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified with HP-UX running HP Secure Shell. These vulnerabilities could be exploited remotely to create a Denial of Service (DoS) and other vulnerabilities. References: CVE-2013-4548 - remote Permissions, Privileges, and Access Control (CWE-264) CVE-2014-1692 - remote Denial of Service (DoS), Buffer Errors (CWE-119) CVE-2014-2532 - remote Permissions, Privileges, and Access Control (CWE-264) CVE-2014-2653 - remote Input Validation (CWE-20) SSRT101487 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP-UX B.11.11 running HP Secure Shell before version A.06.20.010 HP-UX B.11.23 running HP Secure Shell before version A.06.20.011 HP-UX B.11.31 running HP Secure Shell before version A.06.20.012 BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2013-4548 (AV:N/AC:M/Au:S/C:P/I:P/A:P) 6.0 CVE-2014-1692 (AV:N/AC:L/Au:N/C:P/I:P/A:P) 7.5 CVE-2014-2532 (AV:N/AC:M/Au:N/C:P/I:P/A:N) 5.8 CVE-2014-2653 (AV:N/AC:M/Au:N/C:P/I:P/A:N) 5.8 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided the following software updates to resolve this vulnerability. The updates are available for download from: http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber= T1471AA OS Release HP Secure Shell Version Depot Name HP-UX B.11.11 (11i v1) A.06.20.010 or subsequent HP_UX_11i_v1_T1471AA_A.06.20.010_HP-UX_B.11.11_32_64.depot HP-UX B.11.23 (11i v2) A.06.20.011 or subsequent HP_UX_11i_v2_T1471AA_A.06.20.011_HP-UX_B.11.23_IA_PA.depot HP-UX B.11.31 (11i v3) A.06.20.012 or subsequent HP_UX_11i_v3_SecureShell_A.06.20.012_HP-UX_B.11.31_IA_PA.depot MANUAL ACTIONS: Yes - Update 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 HP-UX B.11.11 ============== Secure_Shell.SECURE_SHELL action: install revision A.06.20.010 or subsequent HP-UX B.11.23 ============== Secure_Shell.SECSH-CMN Secure_Shell.SECURE_SHELL action: install revision A.06.20.011 or subsequent HP-UX B.11.31 ============== Secure_Shell.SECSH-CMN Secure_Shell.SECURE_SHELL action: install revision A.06.20.012 or subsequent END AFFECTED VERSIONS HISTORY: Version:1 (rev.1) - 7 November 2014 Initial Release 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 issues about implementing the recommendations of this Security Bulletin, contact normal HP Services support channel. For other issues about the content of this Security Bulletin, send e-mail to security-alert@hp.com. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com Subscribe: To initiate a subscription to receive future HP Security Bulletin alerts via Email: http://h41183.www4.hp.com/signup_alerts.php?jumpid=hpsc_secbulletins Security Bulletin Archive: A list of recently released Security Bulletins is available here: https://h20564.www2.hp.com/portal/site/hpsc/public/kb/secBullArchive/ Software Product Category: The Software Product Category is represented in the title by the two characters following HPSB. 3C = 3COM 3P = 3rd Party Software GN = HP General Software HF = HP Hardware and Firmware MP = MPE/iX MU = Multi-Platform Software NS = NonStop Servers OV = OpenVMS PI = Printing and Imaging PV = ProCurve ST = Storage Software TU = Tru64 UNIX UX = HP-UX Copyright 2014 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 SIGNATURE----- Version: GnuPG v1.4.13 (GNU/Linux) iEYEARECAAYFAlRdO/EACgkQ4B86/C0qfVnYkgCeLMLjqzE6VGLCkM3u78b26zM1 fb0AoP1SzrPW/A7s5xQwcYjlVEYxqxvL =ZG0w -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

permissions and access control

CONFIGURATIONS

PATCH

EXTERNAL IDS

REFERENCES