GLSA 200802-11: Asterisk: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	high
Title:	Asterisk: Multiple vulnerabilities
Date:	02/26/2008
Bugs:	#185713
ID:	200802-11

Synopsis

Multiple vulnerabilities have been found in Asterisk.

Background

Asterisk is an open source telephony engine and tool kit.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/asterisk	< 1.2.21.1-r1	>= 1.2.17-r1	All supported architectures

Description

Multiple vulnerabilities have been found in Asterisk:

Russel Bryant reported a stack 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.

Resolution

All Asterisk users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.17-r1"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200802-11.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 https://bugs.gentoo.org.