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Gentoo Linux Security Advisory GLSA 200809-09 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Postfix: Denial of Service |
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Date: September 19, 2008 |
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Bugs: #236453 |
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ID: 200809-09 |
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Synopsis |
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======== |
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|
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A memory leak in Postfix might allow local users to cause a Denial of |
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Service. |
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Background |
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========== |
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|
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Postfix is Wietse Venema's mailer that attempts to be fast, easy to |
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administer, and secure, as an alternative to the widely-used Sendmail |
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program. |
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 mail-mta/postfix < 2.4.9 >= 2.4.9 |
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>= 2.5.5 |
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mail-mta/postfix < 2.5.5 >= 2.4.9 |
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>= 2.5.5 |
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Description |
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=========== |
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|
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It has been discovered than Postfix leaks an epoll file descriptor when |
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executing external commands, e.g. user-controlled $HOME/.forward or |
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$HOME/.procmailrc files. NOTE: This vulnerability only concerns Postfix |
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instances running on Linux 2.6 kernels. |
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|
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Impact |
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====== |
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|
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A local attacker could exploit this vulnerability to reduce the |
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performance of Postfix, and possibly trigger an assertion, resulting in |
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a Denial of Service. |
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Workaround |
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========== |
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Allow only trusted users to control delivery to non-Postfix commands. |
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Resolution |
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========== |
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All Postfix 2.4 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.4.9" |
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All Postfix 2.5 users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.5.5" |
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|
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References |
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========== |
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[ 1 ] CVE-2008-3889 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3889 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200809-09.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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License |
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======= |
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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