From koon@gentoo.org Mon Jun 21 18:58:50 2004 From: Thierry Carrez To: gentoo-announce@lists.gentoo.org Cc: bugtraq@securityfocus.com, full-disclosure@lists.netsys.com, security-alerts@linuxsecurity.com Date: Mon, 21 Jun 2004 23:03:59 +0200 Subject: [Full-Disclosure] [ GLSA 200406-16 ] Apache 1.3: Buffer overflow in mod_proxy -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200406-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Apache 1.3: Buffer overflow in mod_proxy Date: June 21, 2004 Bugs: #53544 ID: 200406-16 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A bug in mod_proxy may allow a remote attacker to execute arbitrary code when Apache is configured a certain way. Background ========== The Apache HTTP Server Project is an effort to develop and maintain an open-source HTTP server for modern operating systems. The goal of this project is to provide a secure, efficient and extensible server that provides services in tune with the current HTTP standards. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-www/apache <= 1.3.31-r1 >= 1.3.31-r2 Description =========== A bug in the proxy_util.c file may lead to a remote buffer overflow. To trigger the vulnerability an attacker would have to get mod_proxy to connect to a malicous server which returns an invalid (negative) Content-Length. Impact ====== An attacker could cause a Denial of Service as the Apache child handling the request, which will die and under some circumstances execute arbitrary code as the user running Apache, usually "apache". Workaround ========== There is no known workaround at this time. All users are encouraged to upgrade to the latest available version: Resolution ========== Apache 1.x users should upgrade to the latest version of Apache: # emerge sync # emerge -pv ">=net-www/apache-1.3.31-r2" # emerge ">=net-www/apache-1.3.31-r2" References ========== [ 1 ] Georgi Guninski security advisory #69, 2004 http://www.guninski.com/modproxy1.html [ 2 ] CAN-2004-0492 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0492 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200406-16.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 2004 Gentoo Technologies, 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/1.0 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFA100/vcL1obalX08RAhswAKCQ3EJPyzBXKSvsP0GaCbrAfWvm/QCfe9/+ ony5ZwKQQ34i1LK1JHwQ5wA= =W2E1 -----END PGP SIGNATURE----- _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html