GLSA-200802-11 : Asterisk: Multiple vulnerabilities

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-200802-11
(Asterisk: Multiple vulnerabilities)

Multiple vulnerabilities have been found in Asterisk:
Russel Bryant reported a stack-based buffer overflow in the IAX2 channel
driver (chan_iax2) when bridging calls between chan_iax2 and any
channel driver that uses RTP for media (CVE-2007-3762).
Chris
Clark and Zane Lackey (iSEC Partners) reported a NULL pointer
dereference in the IAX2 channel driver (chan_iax2)
(CVE-2007-3763).
Will Drewry (Google Security) reported a
vulnerability in the Skinny channel driver (chan_skinny), resulting in
an overly large memcpy (CVE-2007-3764).
Will Drewry (Google
Security) reported a vulnerability in the IAX2 channel driver
(chan_iax2), that does not correctly handle unauthenticated
transactions using a 3-way handshake (CVE-2007-4103).

Impact :

By sending a long voice or video RTP frame, a remote attacker could
possibly execute arbitrary code on the target machine. Sending
specially crafted LAGRQ or LAGRP frames containing information elements
of IAX frames, or a certain data length value in a crafted packet, or
performing a flood of calls not completing a 3-way handshake, could
result in a Denial of Service.

Workaround :

There is no known workaround at this time.

See also :

http://www.gentoo.org/security/en/glsa/glsa-200802-11.xml

Solution :

All Asterisk users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose '>=net-misc/asterisk-1.2.17-r1'

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)

Family: Gentoo Local Security Checks

Nessus Plugin ID: 31294 (gentoo_GLSA-200802-11.nasl)

Bugtraq ID:

CVE ID: CVE-2007-3762
CVE-2007-3763
CVE-2007-3764
CVE-2007-4103