TUCoPS :: Web :: Apache :: hack0423.htm

TUCoPS :: Web :: Apache :: hack0423.htm
Apache 2: Remote denial of service attack

[ GLSA 200407-03 ] Apache 2: Remote denial of service attack -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200407-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Apache 2: Remote denial of service attack Date: July 04, 2004 Bugs: #55441 ID: 200407-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A bug in Apache may allow a remote attacker to perform a Denial of Service attack. With certain configurations this could lead to a heap based buffer overflow. 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 <= 2.0.49-r3 >= 2.0.49-r4 < 2 Description =========== A bug in the protocol.c file handling header lines will cause Apache to allocate memory for header lines starting with TAB or SPACE. Impact ====== An attacker can exploit this vulnerability to perform a Denial of Service attack by causing Apache to exhaust all memory. On 64 bit systems with more than 4GB of virtual memory a possible integer signedness error could lead to a buffer based overflow causing Apache to crash 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 2 users should upgrade to the latest version of Apache: # emerge sync # emerge -pv ">=net-www/apache-2.0.49-r4" # emerge ">=net-www/apache-2.0.49-r4" References ========== [ 1 ] Georgi Guninski security advisory #70, 2004 http://www.guninski.com/httpd1.html [ 2 ] CAN-2004-0493 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0493 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200407-03.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 iD8DBQFA6F1fvcL1obalX08RAhz9AKCPeuWIsRNOW23muPm9Wg8o+4DsIgCeIKFG tLPdwSIV5gDVQeZB8jcxozo= =1rY3 -----END PGP SIGNATURE-----