ID

VAR-201110-0291

CVE

CVE-2011-3368

TITLE

Apache HTTP Server of mod_proxy Vulnerability in module sending requests to intranet server

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 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 initial @ (at sign) character. Apache HTTP Server is prone to an information disclosure vulnerability. An attacker can exploit this vulnerability to gain access to sensitive information. The three CVE ids denote slightly different variants of the same issue. Note that, even with this issue fixed, it is the responsibility of the administrator to ensure that the regular expression replacement pattern for the target URI does not allow a client to append arbitrary strings to the host or port parts of the target URI. This is a violation of the privilege separation between the apache2 processes and could potentially be used to worsen the impact of other vulnerabilities. This could allow a remote attacker using cross site scripting to steal authentication cookies. For the oldstable distribution (lenny), these problems have been fixed in version apache2 2.2.9-10+lenny12. For the stable distribution (squeeze), these problems have been fixed in version apache2 2.2.16-6+squeeze6 For the testing distribution (wheezy), these problems will be fixed in version 2.2.22-1. For the unstable distribution (sid), these problems have been fixed in version 2.2.22-1. We recommend that you upgrade your apache2 packages. The new version number for the oldstable distribution is 2.2.6-02-1+lenny7. In the stable distribution, apache2-mpm-itk has the same version number as apache2. Please review the CVE identifiers referenced below for details. Impact ====== A remote attacker might obtain sensitive information, gain privileges, send requests to unintended servers behind proxies, bypass certain security restrictions, obtain the values of HTTPOnly cookies, or cause a Denial of Service in various ways. Workaround ========== There is no known workaround at this time. Resolution ========== All Apache HTTP Server users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=www-servers/apache-2.2.22-r1" References ========== [ 1 ] CVE-2010-0408 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0408 [ 2 ] CVE-2010-0434 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-0434 [ 3 ] CVE-2010-1452 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-1452 [ 4 ] CVE-2010-2791 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2010-2791 [ 5 ] CVE-2011-3192 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3192 [ 6 ] CVE-2011-3348 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3348 [ 7 ] CVE-2011-3368 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3368 [ 8 ] CVE-2011-3607 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-3607 [ 9 ] CVE-2011-4317 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2011-4317 [ 10 ] CVE-2012-0021 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0021 [ 11 ] CVE-2012-0031 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0031 [ 12 ] CVE-2012-0053 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0053 [ 13 ] CVE-2012-0883 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2012-0883 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201206-25.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 . ========================================================================== Ubuntu Security Notice USN-1259-1 November 11, 2011 apache2, apache2-mpm-itk 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: Multiple vulnerabilities and a regression were fixed in the Apache HTTP server. (CVE-2011-3348) Samuel Montosa discovered that the ITK Multi-Processing Module for Apache did not properly handle certain configuration sections that specify NiceValue but not AssignUserID, preventing Apache from dropping privileges correctly. This issue only affected Ubuntu 10.04 LTS, Ubuntu 10.10 and Ubuntu 11.04. (CVE-2011-1176) USN 1199-1 fixed a vulnerability in the byterange filter of Apache. The upstream patch introduced a regression in Apache when handling specific byte range requests. Original advisory details: A flaw was discovered in the byterange filter in Apache. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 11.10: apache2.2-bin 2.2.20-1ubuntu1.1 Ubuntu 11.04: apache2-mpm-itk 2.2.17-1ubuntu1.4 apache2.2-bin 2.2.17-1ubuntu1.4 Ubuntu 10.10: apache2-mpm-itk 2.2.16-1ubuntu3.4 apache2.2-bin 2.2.16-1ubuntu3.4 Ubuntu 10.04 LTS: apache2-mpm-itk 2.2.14-5ubuntu8.7 apache2.2-bin 2.2.14-5ubuntu8.7 Ubuntu 8.04 LTS: apache2.2-common 2.2.8-1ubuntu0.22 In general, a standard system update will make all the necessary changes. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: httpd security and bug fix update Advisory ID: RHSA-2012:0543-01 Product: JBoss Enterprise Web Server Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0543.html Issue date: 2012-05-07 CVE Names: CVE-2011-3348 CVE-2011-3368 CVE-2011-3607 CVE-2012-0021 CVE-2012-0031 CVE-2012-0053 ===================================================================== 1. Summary: An update for the Apache HTTP Server component for JBoss Enterprise Web Server 1.0.2 that fixes multiple security issues and one bug is now available from the Red Hat Customer Portal. 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. In certain configurations, if a reverse proxy used the ProxyPassMatch directive, or if it used the RewriteRule directive with the proxy flag, a remote attacker could make the proxy connect to an arbitrary server, possibly disclosing sensitive information from internal web servers not directly accessible to the attacker. (CVE-2011-3368) It was discovered that mod_proxy_ajp incorrectly returned an "Internal Server Error" response when processing certain malformed HTTP requests, which caused the back-end server to be marked as failed in configurations where mod_proxy was used in load balancer mode. A remote attacker could cause mod_proxy to not send requests to back-end AJP (Apache JServ Protocol) servers for the retry timeout period or until all back-end servers were marked as failed. (CVE-2011-3348) 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 NULL pointer dereference flaw was found in the httpd mod_log_config module. In configurations where cookie logging is enabled, a remote attacker could use this flaw to crash the httpd child process via an HTTP request with a malformed Cookie header. (CVE-2012-0021) 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) Red Hat would like to thank Context Information Security for reporting the CVE-2011-3368 issue. This update also fixes the following bug: * The fix for CVE-2011-3192 provided by the RHSA-2011:1330 update introduced a regression in the way httpd handled certain Range HTTP header values. This update corrects this regression. (BZ#749071) All users of JBoss Enterprise Web Server 1.0.2 as provided from the Red Hat Customer Portal are advised to apply this update. 3. Solution: The References section of this erratum contains a download link (you must log in to download the update). Before applying the update, back up your existing JBoss Enterprise Web Server installation (including all applications and configuration files). 4. Bugs fixed (http://bugzilla.redhat.com/): 736690 - CVE-2011-3348 httpd: mod_proxy_ajp remote temporary DoS 740045 - CVE-2011-3368 httpd: reverse web proxy vulnerability 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 785065 - CVE-2012-0021 httpd: NULL pointer dereference crash in mod_log_config 785069 - CVE-2012-0053 httpd: cookie exposure due to error responses 5. References: https://www.redhat.com/security/data/cve/CVE-2011-3348.html https://www.redhat.com/security/data/cve/CVE-2011-3368.html https://www.redhat.com/security/data/cve/CVE-2011-3607.html https://www.redhat.com/security/data/cve/CVE-2012-0021.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://access.redhat.com/jbossnetwork/restricted/listSoftware.html?product=webserver&downloadType=securityPatches&version=1.0.2 https://rhn.redhat.com/errata/RHSA-2011-1330.html 6. 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) iD8DBQFPqBfUXlSAg2UNWIIRAgp2AJ432q0jjbDmtWUkzP2pTCOTuyM5ywCcDYDy 4xGCmUQd1BJTxhSroB4/okA= =45KX -----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. Relevant releases/architectures: RHEL Desktop Workstation (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64 Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64 Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64 3. (BZ#736593, BZ#736594) All httpd users should upgrade to these updated packages, which contain backported patches to correct these issues. Solution: Before applying this update, make sure all previously-released errata relevant to your system have been applied. Package List: Red Hat Enterprise Linux AS version 4: Source: ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm i386: httpd-2.0.52-49.ent.i386.rpm httpd-debuginfo-2.0.52-49.ent.i386.rpm httpd-devel-2.0.52-49.ent.i386.rpm httpd-manual-2.0.52-49.ent.i386.rpm httpd-suexec-2.0.52-49.ent.i386.rpm mod_ssl-2.0.52-49.ent.i386.rpm ia64: httpd-2.0.52-49.ent.ia64.rpm httpd-debuginfo-2.0.52-49.ent.ia64.rpm httpd-devel-2.0.52-49.ent.ia64.rpm httpd-manual-2.0.52-49.ent.ia64.rpm httpd-suexec-2.0.52-49.ent.ia64.rpm mod_ssl-2.0.52-49.ent.ia64.rpm ppc: httpd-2.0.52-49.ent.ppc.rpm httpd-debuginfo-2.0.52-49.ent.ppc.rpm httpd-devel-2.0.52-49.ent.ppc.rpm httpd-manual-2.0.52-49.ent.ppc.rpm httpd-suexec-2.0.52-49.ent.ppc.rpm mod_ssl-2.0.52-49.ent.ppc.rpm s390: httpd-2.0.52-49.ent.s390.rpm httpd-debuginfo-2.0.52-49.ent.s390.rpm httpd-devel-2.0.52-49.ent.s390.rpm httpd-manual-2.0.52-49.ent.s390.rpm httpd-suexec-2.0.52-49.ent.s390.rpm mod_ssl-2.0.52-49.ent.s390.rpm s390x: httpd-2.0.52-49.ent.s390x.rpm httpd-debuginfo-2.0.52-49.ent.s390x.rpm httpd-devel-2.0.52-49.ent.s390x.rpm httpd-manual-2.0.52-49.ent.s390x.rpm httpd-suexec-2.0.52-49.ent.s390x.rpm mod_ssl-2.0.52-49.ent.s390x.rpm x86_64: httpd-2.0.52-49.ent.x86_64.rpm httpd-debuginfo-2.0.52-49.ent.x86_64.rpm httpd-devel-2.0.52-49.ent.x86_64.rpm httpd-manual-2.0.52-49.ent.x86_64.rpm httpd-suexec-2.0.52-49.ent.x86_64.rpm mod_ssl-2.0.52-49.ent.x86_64.rpm Red Hat Enterprise Linux Desktop version 4: Source: ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm i386: httpd-2.0.52-49.ent.i386.rpm httpd-debuginfo-2.0.52-49.ent.i386.rpm httpd-devel-2.0.52-49.ent.i386.rpm httpd-manual-2.0.52-49.ent.i386.rpm httpd-suexec-2.0.52-49.ent.i386.rpm mod_ssl-2.0.52-49.ent.i386.rpm x86_64: httpd-2.0.52-49.ent.x86_64.rpm httpd-debuginfo-2.0.52-49.ent.x86_64.rpm httpd-devel-2.0.52-49.ent.x86_64.rpm httpd-manual-2.0.52-49.ent.x86_64.rpm httpd-suexec-2.0.52-49.ent.x86_64.rpm mod_ssl-2.0.52-49.ent.x86_64.rpm Red Hat Enterprise Linux ES version 4: Source: ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm i386: httpd-2.0.52-49.ent.i386.rpm httpd-debuginfo-2.0.52-49.ent.i386.rpm httpd-devel-2.0.52-49.ent.i386.rpm httpd-manual-2.0.52-49.ent.i386.rpm httpd-suexec-2.0.52-49.ent.i386.rpm mod_ssl-2.0.52-49.ent.i386.rpm ia64: httpd-2.0.52-49.ent.ia64.rpm httpd-debuginfo-2.0.52-49.ent.ia64.rpm httpd-devel-2.0.52-49.ent.ia64.rpm httpd-manual-2.0.52-49.ent.ia64.rpm httpd-suexec-2.0.52-49.ent.ia64.rpm mod_ssl-2.0.52-49.ent.ia64.rpm x86_64: httpd-2.0.52-49.ent.x86_64.rpm httpd-debuginfo-2.0.52-49.ent.x86_64.rpm httpd-devel-2.0.52-49.ent.x86_64.rpm httpd-manual-2.0.52-49.ent.x86_64.rpm httpd-suexec-2.0.52-49.ent.x86_64.rpm mod_ssl-2.0.52-49.ent.x86_64.rpm Red Hat Enterprise Linux WS version 4: Source: ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/httpd-2.0.52-49.ent.src.rpm i386: httpd-2.0.52-49.ent.i386.rpm httpd-debuginfo-2.0.52-49.ent.i386.rpm httpd-devel-2.0.52-49.ent.i386.rpm httpd-manual-2.0.52-49.ent.i386.rpm httpd-suexec-2.0.52-49.ent.i386.rpm mod_ssl-2.0.52-49.ent.i386.rpm ia64: httpd-2.0.52-49.ent.ia64.rpm httpd-debuginfo-2.0.52-49.ent.ia64.rpm httpd-devel-2.0.52-49.ent.ia64.rpm httpd-manual-2.0.52-49.ent.ia64.rpm httpd-suexec-2.0.52-49.ent.ia64.rpm mod_ssl-2.0.52-49.ent.ia64.rpm x86_64: httpd-2.0.52-49.ent.x86_64.rpm httpd-debuginfo-2.0.52-49.ent.x86_64.rpm httpd-devel-2.0.52-49.ent.x86_64.rpm httpd-manual-2.0.52-49.ent.x86_64.rpm httpd-suexec-2.0.52-49.ent.x86_64.rpm mod_ssl-2.0.52-49.ent.x86_64.rpm Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm i386: httpd-2.2.3-53.el5_7.3.i386.rpm httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm mod_ssl-2.2.3-53.el5_7.3.i386.rpm x86_64: httpd-2.2.3-53.el5_7.3.x86_64.rpm httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm mod_ssl-2.2.3-53.el5_7.3.x86_64.rpm RHEL Desktop Workstation (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm i386: httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm httpd-devel-2.2.3-53.el5_7.3.i386.rpm httpd-manual-2.2.3-53.el5_7.3.i386.rpm x86_64: httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm httpd-devel-2.2.3-53.el5_7.3.i386.rpm httpd-devel-2.2.3-53.el5_7.3.x86_64.rpm httpd-manual-2.2.3-53.el5_7.3.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/httpd-2.2.3-53.el5_7.3.src.rpm i386: httpd-2.2.3-53.el5_7.3.i386.rpm httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm httpd-devel-2.2.3-53.el5_7.3.i386.rpm httpd-manual-2.2.3-53.el5_7.3.i386.rpm mod_ssl-2.2.3-53.el5_7.3.i386.rpm ia64: httpd-2.2.3-53.el5_7.3.ia64.rpm httpd-debuginfo-2.2.3-53.el5_7.3.ia64.rpm httpd-devel-2.2.3-53.el5_7.3.ia64.rpm httpd-manual-2.2.3-53.el5_7.3.ia64.rpm mod_ssl-2.2.3-53.el5_7.3.ia64.rpm ppc: httpd-2.2.3-53.el5_7.3.ppc.rpm httpd-debuginfo-2.2.3-53.el5_7.3.ppc.rpm httpd-debuginfo-2.2.3-53.el5_7.3.ppc64.rpm httpd-devel-2.2.3-53.el5_7.3.ppc.rpm httpd-devel-2.2.3-53.el5_7.3.ppc64.rpm httpd-manual-2.2.3-53.el5_7.3.ppc.rpm mod_ssl-2.2.3-53.el5_7.3.ppc.rpm s390x: httpd-2.2.3-53.el5_7.3.s390x.rpm httpd-debuginfo-2.2.3-53.el5_7.3.s390.rpm httpd-debuginfo-2.2.3-53.el5_7.3.s390x.rpm httpd-devel-2.2.3-53.el5_7.3.s390.rpm httpd-devel-2.2.3-53.el5_7.3.s390x.rpm httpd-manual-2.2.3-53.el5_7.3.s390x.rpm mod_ssl-2.2.3-53.el5_7.3.s390x.rpm x86_64: httpd-2.2.3-53.el5_7.3.x86_64.rpm httpd-debuginfo-2.2.3-53.el5_7.3.i386.rpm httpd-debuginfo-2.2.3-53.el5_7.3.x86_64.rpm httpd-devel-2.2.3-53.el5_7.3.i386.rpm httpd-devel-2.2.3-53.el5_7.3.x86_64.rpm httpd-manual-2.2.3-53.el5_7.3.x86_64.rpm mod_ssl-2.2.3-53.el5_7.3.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

AFFECTED PRODUCTS