Joined: 12 May 2004
|Posted: Tue Feb 26, 2008 11:26 pm Post subject: [ GLSA 200802-11 ] Asterisk: Multiple vulnerabilities
|Gentoo Linux Security Advisory
Title: Asterisk: Multiple vulnerabilities (GLSA 200802-11)
Date: February 26, 2008
Multiple vulnerabilities have been found in Asterisk.
Asterisk is an open source telephony engine and tool kit.
Vulnerable: < 184.108.40.206-r1
Unaffected: >= 1.2.17-r1 < 1.2.18
Unaffected: >= 220.127.116.11-r1
Architectures: All supported architectures
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).
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.
There is no known workaround at this time.
All Asterisk users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.17-r1"