- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200907-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Apache: Multiple vulnerabilities Date: July 12, 2009 Bugs: #268154, #271470, #276426, #276792 ID: 200907-04 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Multiple vulnerabilities in the Apache HTTP daemon allow for local privilege escalation, information disclosure or Denial of Service attacks. Background ========== The Apache HTTP server is one of the most popular web servers on the Internet. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 www-servers/apache < 2.2.11-r2 >= 2.2.11-r2 Description =========== Multiple vulnerabilities have been discovered in the Apache HTTP server: * Jonathan Peatfield reported that the "Options=IncludesNoEXEC" argument to the "AllowOverride" directive is not processed properly (CVE-2009-1195). * Sander de Boer discovered that the AJP proxy module (mod_proxy_ajp) does not correctly handle POST requests that do not contain a request body (CVE-2009-1191). * The vendor reported that the HTTP proxy module (mod_proxy_http), when being used as a reverse proxy, does not properly handle requests containing more data as stated in the "Content-Length" header (CVE-2009-1890). * Francois Guerraz discovered that mod_deflate does not abort the compression of large files even when the requesting connection is closed prematurely (CVE-2009-1891). Impact ====== A local attacker could circumvent restrictions put up by the server administrator and execute arbitrary commands with the privileges of the user running the Apache server. A remote attacker could send multiple requests to a server with the AJP proxy module, possibly resulting in the disclosure of a request intended for another client, or cause a Denial of Service by sending specially crafted requests to servers running mod_proxy_http or mod_deflate. Workaround ========== Remove "include", "mod_proxy_ajp", "mod_proxy_http" and "deflate" from APACHE2_MODULES in make.conf and rebuild Apache, or disable the aforementioned modules in the Apache configuration. Resolution ========== All Apache users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=www-servers/apache-2.2.11-r2" References ========== [ 1 ] CVE-2009-1195 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1195 [ 2 ] CVE-2009-1191 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1191 [ 3 ] CVE-2009-1890 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1890 [ 4 ] CVE-2009-1891 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1891 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200907-04.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 http://bugs.gentoo.org. License ======= Copyright 2009 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