Postfix epoll File Descriptor Leak Local DoS

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


Synopsis :

The remote mail server is vulnerable to a local denial of service
attack.

Description :

According to its banner, the version of Postfix running on the remote
host leaks 'epoll' file descriptors when it executes non-Postfix
commands from, say, a user's .forward file. A local attacker can
access the leaked epoll descriptor to launch a denial of service
attack against Postfix.

Note that this issue only affects hosts running Linux with a 2.6
kernel.

See also :

http://www.securityfocus.com/archive/1/495894/100/0/threaded

Solution :

Upgrade to Postfix 2.4.9 / 2.5.5 / 2.6-20080902 or later.

Risk factor :

Low / CVSS Base Score : 2.1
(CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 1.6
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: SMTP problems

Nessus Plugin ID: 34347 ()

Bugtraq ID: 30977

CVE ID: CVE-2008-3889