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[ GLSA 200809-09 ] Postfix: Denial of Service
From: Pierre-Yves Rofes <py () gentoo org>
Date: Fri, 19 Sep 2008 22:10:45 +0200
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200809-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Postfix: Denial of Service Date: September 19, 2008 Bugs: #236453 ID: 200809-09 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A memory leak in Postfix might allow local users to cause a Denial of Service. Background ========== Postfix is Wietse Venema's mailer that attempts to be fast, easy to administer, and secure, as an alternative to the widely-used Sendmail program. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 mail-mta/postfix < 2.4.9 >= 2.4.9 >= 2.5.5 mail-mta/postfix < 2.5.5 >= 2.4.9 >= 2.5.5 Description =========== It has been discovered than Postfix leaks an epoll file descriptor when executing external commands, e.g. user-controlled $HOME/.forward or $HOME/.procmailrc files. NOTE: This vulnerability only concerns Postfix instances running on Linux 2.6 kernels. Impact ====== A local attacker could exploit this vulnerability to reduce the performance of Postfix, and possibly trigger an assertion, resulting in a Denial of Service. Workaround ========== Allow only trusted users to control delivery to non-Postfix commands. Resolution ========== All Postfix 2.4 users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.4.9" All Postfix 2.5 users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.5.5" References ========== [ 1 ] CVE-2008-3889 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3889 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200809-09.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 2008 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 200809-09 ] Postfix: Denial of Service Pierre-Yves Rofes (Sep 19)