GLSA-200809-09 : Postfix: Denial of Service

This script is Copyright (C) 2008-2014 Tenable Network Security, Inc.


Synopsis :

The remote Gentoo host is missing one or more security-related
patches.

Description :

The remote host is affected by the vulnerability described in GLSA-200809-09
(Postfix: Denial of Service)

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.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200809-09.xml

Solution :

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'

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 34248 (gentoo_GLSA-200809-09.nasl)

Bugtraq ID:

CVE ID: CVE-2008-3889