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[ GLSA 200907-02 ] ModSecurity: Denial of Service
From: Alex Legler <a3li () gentoo org>
Date: Thu, 02 Jul 2009 21:38:32 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200907-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: ModSecurity: Denial of Service Date: July 02, 2009 Bugs: #262302 ID: 200907-02 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Two vulnerabilities in ModSecurity might lead to a Denial of Service. Background ========== ModSecurity is a popular web application firewall for the Apache HTTP server. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 www-apache/mod_security < 2.5.9 >= 2.5.9 Description =========== Multiple vulnerabilities were discovered in ModSecurity: * Juan Galiana Lara of ISecAuditors discovered a NULL pointer dereference when processing multipart requests without a part header name (CVE-2009-1902). * Steve Grubb of Red Hat reported that the "PDF XSS protection" feature does not properly handle HTTP requests to a PDF file that do not use the GET method (CVE-2009-1903). Impact ====== A remote attacker might send requests containing specially crafted multipart data or send certain requests to access a PDF file, possibly resulting in a Denial of Service (crash) of the Apache HTTP daemon. NOTE: The PDF XSS protection is not enabled by default. Workaround ========== There is no known workaround at this time. Resolution ========== All ModSecurity users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=www-apache/mod_security-2.5.9" References ========== [ 1 ] CVE-2009-1902 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1902 [ 2 ] CVE-2009-1903 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1903 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200907-02.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
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- [ GLSA 200907-02 ] ModSecurity: Denial of Service Alex Legler (Jul 02)