ID

VAR-201111-0207

CVE

CVE-2011-4317

TITLE

Apache HTTP Server mod_proxy Reverse Proxy Mode Security Bypass Vulnerability

DESCRIPTION

The mod_proxy module in the Apache HTTP Server 1.3.x through 1.3.42, 2.0.x through 2.0.64, and 2.2.x through 2.2.21, when the Revision 1179239 patch is in place, does not properly interact with use of (1) RewriteRule and (2) ProxyPassMatch pattern matches for configuration of a reverse proxy, which allows remote attackers to send requests to intranet servers via a malformed URI containing an @ (at sign) character and a : (colon) character in invalid positions. NOTE: this vulnerability exists because of an incomplete fix for CVE-2011-3368. Apache HTTP Server is prone to a security-bypass vulnerability. Successful exploits will allow attackers to bypass certain security restrictions and obtain sensitive information about running web applications. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: httpd security update Advisory ID: RHSA-2012:0128-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0128.html Issue date: 2012-02-13 CVE Names: CVE-2011-3607 CVE-2011-3639 CVE-2011-4317 CVE-2012-0031 CVE-2012-0053 ===================================================================== 1. Summary: Updated httpd packages that fix multiple security issues are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, noarch, x86_64 Red Hat Enterprise Linux HPC Node (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - noarch, x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64 3. It was discovered that the fix for CVE-2011-3368 (released via RHSA-2011:1391) did not completely address the problem. An attacker could bypass the fix and make a reverse proxy connect to an arbitrary server not directly accessible to the attacker by sending an HTTP version 0.9 request, or by using a specially-crafted URI. (CVE-2011-3639, CVE-2011-4317) The httpd server included the full HTTP header line in the default error page generated when receiving an excessively long or malformed header. Malicious JavaScript running in the server's domain context could use this flaw to gain access to httpOnly cookies. (CVE-2012-0053) An integer overflow flaw, leading to a heap-based buffer overflow, was found in the way httpd performed substitutions in regular expressions. An attacker able to set certain httpd settings, such as a user permitted to override the httpd configuration for a specific directory using a ".htaccess" file, could use this flaw to crash the httpd child process or, possibly, execute arbitrary code with the privileges of the "apache" user. (CVE-2011-3607) A flaw was found in the way httpd handled child process status information. A malicious program running with httpd child process privileges (such as a PHP or CGI script) could use this flaw to cause the parent httpd process to crash during httpd service shutdown. (CVE-2012-0031) All httpd users should upgrade to these updated packages, which contain backported patches to correct these issues. After installing the updated packages, the httpd daemon will be restarted automatically. 4. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259 5. Bugs fixed (http://bugzilla.redhat.com/): 752080 - CVE-2011-3639 httpd: http 0.9 request bypass of the reverse proxy vulnerability CVE-2011-3368 fix 756483 - CVE-2011-4317 httpd: uri scheme bypass of the reverse proxy vulnerability CVE-2011-3368 fix 769844 - CVE-2011-3607 httpd: ap_pregsub Integer overflow to buffer overflow 773744 - CVE-2012-0031 httpd: possible crash on shutdown due to flaw in scoreboard handling 785069 - CVE-2012-0053 httpd: cookie exposure due to error responses 6. Package List: Red Hat Enterprise Linux Desktop (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm i386: httpd-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-tools-2.2.15-15.el6_2.1.i686.rpm x86_64: httpd-2.2.15-15.el6_2.1.x86_64.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm Red Hat Enterprise Linux Desktop Optional (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm i386: httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm mod_ssl-2.2.15-15.el6_2.1.i686.rpm noarch: httpd-manual-2.2.15-15.el6_2.1.noarch.rpm x86_64: httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm Red Hat Enterprise Linux HPC Node (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm x86_64: httpd-2.2.15-15.el6_2.1.x86_64.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm noarch: httpd-manual-2.2.15-15.el6_2.1.noarch.rpm x86_64: httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm Red Hat Enterprise Linux Server (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm i386: httpd-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-tools-2.2.15-15.el6_2.1.i686.rpm mod_ssl-2.2.15-15.el6_2.1.i686.rpm noarch: httpd-manual-2.2.15-15.el6_2.1.noarch.rpm ppc64: httpd-2.2.15-15.el6_2.1.ppc64.rpm httpd-debuginfo-2.2.15-15.el6_2.1.ppc.rpm httpd-debuginfo-2.2.15-15.el6_2.1.ppc64.rpm httpd-devel-2.2.15-15.el6_2.1.ppc.rpm httpd-devel-2.2.15-15.el6_2.1.ppc64.rpm httpd-tools-2.2.15-15.el6_2.1.ppc64.rpm mod_ssl-2.2.15-15.el6_2.1.ppc64.rpm s390x: httpd-2.2.15-15.el6_2.1.s390x.rpm httpd-debuginfo-2.2.15-15.el6_2.1.s390.rpm httpd-debuginfo-2.2.15-15.el6_2.1.s390x.rpm httpd-devel-2.2.15-15.el6_2.1.s390.rpm httpd-devel-2.2.15-15.el6_2.1.s390x.rpm httpd-tools-2.2.15-15.el6_2.1.s390x.rpm mod_ssl-2.2.15-15.el6_2.1.s390x.rpm x86_64: httpd-2.2.15-15.el6_2.1.x86_64.rpm httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 6): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/httpd-2.2.15-15.el6_2.1.src.rpm i386: httpd-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-tools-2.2.15-15.el6_2.1.i686.rpm mod_ssl-2.2.15-15.el6_2.1.i686.rpm noarch: httpd-manual-2.2.15-15.el6_2.1.noarch.rpm x86_64: httpd-2.2.15-15.el6_2.1.x86_64.rpm httpd-debuginfo-2.2.15-15.el6_2.1.i686.rpm httpd-debuginfo-2.2.15-15.el6_2.1.x86_64.rpm httpd-devel-2.2.15-15.el6_2.1.i686.rpm httpd-devel-2.2.15-15.el6_2.1.x86_64.rpm httpd-tools-2.2.15-15.el6_2.1.x86_64.rpm mod_ssl-2.2.15-15.el6_2.1.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://www.redhat.com/security/data/cve/CVE-2011-3607.html https://www.redhat.com/security/data/cve/CVE-2011-3639.html https://www.redhat.com/security/data/cve/CVE-2011-4317.html https://www.redhat.com/security/data/cve/CVE-2012-0031.html https://www.redhat.com/security/data/cve/CVE-2012-0053.html https://access.redhat.com/security/updates/classification/#moderate https://rhn.redhat.com/errata/RHSA-2011-1391.html 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2012 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFPOXUIXlSAg2UNWIIRAg4AAJ9vTPttyKrbHbaSV7xCAzG89ytZgACfTSq+ HOLS5+cKusdo+jUiYKIV4mw= =fM2U -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce . This version of Apache is principally a security and bug fix release, including the following significant security fixes: * SECURITY: CVE-2011-3368 (cve.mitre.org) Reject requests where the request-URI does not match the HTTP specification, preventing unexpected expansion of target URLs in some reverse proxy configurations. * SECURITY: CVE-2011-3607 (cve.mitre.org) Fix integer overflow in ap_pregsub() which, when the mod_setenvif module is enabled, could allow local users to gain privileges via a .htaccess file. * SECURITY: CVE-2011-4317 (cve.mitre.org) Resolve additional cases of URL rewriting with ProxyPassMatch or RewriteRule, where particular request-URIs could result in undesired backend network exposure in some configurations. * SECURITY: CVE-2012-0021 (cve.mitre.org) mod_log_config: Fix segfault (crash) when the '%{cookiename}C' log format string is in use and a client sends a nameless, valueless cookie, causing a denial of service. The issue existed since version 2.2.17. * SECURITY: CVE-2012-0053 (cve.mitre.org) Fixed an issue in error responses that could expose "httpOnly" cookies when no custom ErrorDocument is specified for status code 400. The Apache HTTP Project thanks halfdog, Context Information Security Ltd, Prutha Parikh of Qualys, and Norman Hippert for bringing these issues to the attention of the security team. We consider this release to be the best version of Apache available, and encourage users of all prior versions to upgrade. Apache HTTP Server 2.2.22 is available for download from: http://httpd.apache.org/download.cgi Please see the CHANGES_2.2 file, linked from the download page, for a full list of changes. A condensed list, CHANGES_2.2.22 includes only those changes introduced since the prior 2.2 release. A summary of all of the security vulnerabilities addressed in this and earlier releases is available: http://httpd.apache.org/security/vulnerabilities_22.html This release includes the Apache Portable Runtime (APR) version 1.4.5 and APR Utility Library (APR-util) version 1.4.2, bundled with the tar and zip distributions. The APR libraries libapr and libaprutil (and on Win32, libapriconv version 1.2.1) must all be updated to ensure binary compatibility and address many known security and platform bugs. APR-util version 1.4 represents a minor version upgrade from earlier httpd source distributions, which previously included version 1.3. Apache 2.2 offers numerous enhancements, improvements, and performance boosts over the 2.0 codebase. For an overview of new features introduced since 2.0 please see: http://httpd.apache.org/docs/2.2/new_features_2_2.html This release builds on and extends the Apache 2.0 API. Modules written for Apache 2.0 will need to be recompiled in order to run with Apache 2.2, and require minimal or no source code changes. http://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x/VERSIONING When upgrading or installing this version of Apache, please bear in mind that if you intend to use Apache with one of the threaded MPMs (other than the Prefork MPM), you must ensure that any modules you will be using (and the libraries they depend on) are thread-safe. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c03231301 Version: 1 HPSBMU02748 SSRT100772 rev.1 - HP OpenView Network Node Manager (OV NNM) Running Apache HTTP Server, Remote Unauthorized Disclosure of Information, Unauthorized Modification, Denial of Service (DoS) NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2012-03-27 Last Updated: 2012-03-27 Potential Security Impact: Remote unauthorized disclosure of information, unauthorized modification, Denial of Service (DoS) Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY Potential security vulnerabilities have been identified with HP OpenView Network Node Manager (OV NNM) running Apache HTTP Server. The vulnerabilities could be exploited remotely resulting in unauthorized disclosure of information, unauthorized modification, or Denial of Service (DoS). References: CVE-2012-0053, CVE-2012-0031, CVE-2012-0021, CVE-2011-4317, CVE-2011-3607, CVE-2011-3368 SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. HP OpenView Network Node Manager (OV NNM) v7.53 running on HP-UX, Linux, and Solaris. BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2012-0053 (AV:N/AC:M/Au:N/C:P/I:N/A:N) 4.3 CVE-2012-0031 (AV:L/AC:L/Au:N/C:P/I:P/A:P) 4.6 CVE-2012-0021 (AV:N/AC:H/Au:N/C:N/I:N/A:P) 2.6 CVE-2011-4317 (AV:N/AC:M/Au:N/C:N/I:P/A:N) 4.3 CVE-2011-3607 (AV:L/AC:M/Au:N/C:P/I:P/A:P) 4.4 CVE-2011-3368 (AV:N/AC:L/Au:N/C:P/I:N/A:N) 5.0 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided a hotfix to resolve the vulnerabilities. The SSRT100772 hotfix is available by contacting the normal HP Services support channel. MANUAL ACTIONS: Yes - NonUpdate Install the hotfix for SSRT100772. 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 Security Bulletins issued by HP 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 The following text is for use by the HP-UX Software Assistant. AFFECTED VERSIONS (for HP-UX) For HP-UX OV NNM 7.53 HP-UX B.11.31 HP-UX B.11.23 (IA) HP-UX B.11.23 (PA) HP-UX B.11.11 ============= OVNNMgr.OVNNM-RUN,fr=B.07.50.00 action: install the hotfix for SSRT100772 END AFFECTED VERSIONS (for HP-UX) HISTORY Version:1 (rev.1) - 27 March 2012 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 List: A list of HP Security Bulletins, updated periodically, is contained in HP Security Notice HPSN-2011-001: https://h20566.www2.hp.com/portal/site/hpsc/public/kb/docDisplay/?docId=emr_na-c02964430 Security Bulletin Archive: A list of recently released Security Bulletins is available here: http://h20566.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 2012 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. HP Secure Web Server (SWS) for OpenVMS V2.2 and earlier. ============================================================================ Ubuntu Security Notice USN-1368-1 February 16, 2012 apache2 vulnerabilities ============================================================================ A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 11.10 - Ubuntu 11.04 - Ubuntu 10.10 - Ubuntu 10.04 LTS - Ubuntu 8.04 LTS Summary: Several security issues were fixed in the Apache HTTP Server. An attacker having write access to a .htaccess file may exploit this to possibly execute arbitrary code. (CVE-2011-3607) Prutha Parikh discovered that the mod_proxy module did not properly interact with the RewriteRule and ProxyPassMatch pattern matches in the configuration of a reverse proxy. This could allow remote attackers to contact internal webservers behind the proxy that were not intended for external exposure. (CVE-2011-4317) Rainer Canavan discovered that the mod_log_config module incorrectly handled a certain format string when used with a threaded MPM. A remote attacker could exploit this to cause a denial of service via a specially- crafted cookie. (CVE-2012-0021) It was discovered that the Apache HTTP Server incorrectly handled certain type fields within a scoreboard shared memory segment. A local attacker could exploit this to to cause a denial of service. A remote attacker could exploit this to obtain the values of certain HTTPOnly cookies. (CVE-2012-0053) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: apache2.2-common 2.2.20-1ubuntu1.2 Ubuntu 11.04: apache2.2-common 2.2.17-1ubuntu1.5 Ubuntu 10.10: apache2.2-common 2.2.16-1ubuntu3.5 Ubuntu 10.04 LTS: apache2.2-common 2.2.14-5ubuntu8.8 Ubuntu 8.04 LTS: apache2.2-common 2.2.8-1ubuntu0.23 In general, a standard system update will make all the necessary changes. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 _______________________________________________________________________ Mandriva Linux Security Advisory MDVSA-2012:003 http://www.mandriva.com/security/ _______________________________________________________________________ Package : apache Date : January 10, 2012 Affected: 2010.1, 2011., Enterprise Server 5.0 _______________________________________________________________________ Problem Description: Multiple vulnerabilities has been found and corrected in apache: Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, allows local users to gain privileges via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, leading to a heap-based buffer overflow (CVE-2011-3607). The verification of md5 checksums and GPG signatures is performed automatically for you. All packages are signed by Mandriva for security. You can obtain the GPG public key of the Mandriva Security Team by executing: gpg --recv-keys --keyserver pgp.mit.edu 0x22458A98 You can view other update advisories for Mandriva Linux at: http://www.mandriva.com/security/advisories If you want to report vulnerabilities, please contact security_(at)_mandriva.com _______________________________________________________________________ Type Bits/KeyID Date User ID pub 1024D/22458A98 2000-07-10 Mandriva Security Team <security*mandriva.com> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iD8DBQFPDCNImqjQ0CJFipgRAggFAJ9xCusaErCYJUSMv5oAlTiJ5D1aWACg0UBO BqETS5tTpFVDOXlCWWgYIGQ= =8O62 -----END PGP SIGNATURE-----

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

input validation error

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Prutha Parikh, Qualys

SOURCES

LAST UPDATE DATE

2026-08-15T00:52:53.073000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE