38195 : Asterisk IAX2 Channel Driver (chan_iax2) Malformed IAX Frame Remote DoS
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Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
7	161	over 4 years ago	over 3 years ago	1 times	90%

Timeline

Disclosure Date	Vendor Solution Date
2007-07-17	2007-07-17

Keywords

AST-2007-015

Description

A remote overflow exists in the IAX2 channel driver (chan_iax2). The driver fails to provide proper boundary control on receiving LAGRQ and LAGRP frames resulting in a null pointer overflow. With a specially crafted request, an attacker can cause a denial of service resulting in a loss of availability.

Classification

Location: Remote / Network Access
Attack Type: Denial of Service
Impact: Loss of Availability
Solution: Upgrade
Exploit: Exploit Unknown
Disclosure: Vendor Verified

Solution

Upgrade to Asterisk version 1.2.22 and/or 1.4.8, Asterisk Business Edition B.2.2.1, AsteriskNOW beta 7, Asterisk Appliance Developer Kit 0.5.0, s800i Asterisk Appliance 1.0.2 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products

Asterisk	Asterisk	1.0.x
		1.4.8 (not affected)
		1.4.5
		1.4.7.1
		1.4.0-beta1
		1.4.0-beta2
		1.4.0-beta3
		1.4.0-beta4
		1.4.7
		1.4.1
		1.4.2
		1.4.3
		1.4.0
		1.4.4
		1.4.6
		1.2.5
		1.2.0-rc2
		1.2.18
		1.2.0
		1.2.21.1
		1.2.3
		1.2.6
		1.2.17
		1.2.16
		1.2.0-beta1
		1.2.7
		1.2.10
		1.2.8
		1.2.1
		1.2.15
		1.2.9
		1.2.13
		1.2.2
		1.2.14
		1.2.12.1
		1.2.12
		1.2.22 (not affected)
		1.2.9.1
		1.2.11
		1.2.7.1
		1.2.21
		1.2.20
		1.2.4
		1.2.0-beta2
		1.2.0-rc1
		1.2.19
	Asterisk Appliance Developer Kit	0.5.0 (not affected)
		0.4.0
		0.3.2a
		0.2.0
	AsteriskNOW	beta7 (not affected)
		beta5
		beta6
		beta4
		beta3
		beta2
		beta1
	Asterisk Business Edition	A.x.x
		B.2.2.1 (not affected)
		B.1.x
	s800i	1.0.2 (not affected)
	s800i	1.0.1

References

Security Tracker: 1018407
CVE ID: 2007-3763 (see also: NVD)
Secunia Advisory ID: 22588 26099 26602 29051
Bugtraq ID: 24949 24950
ISS X-Force ID: 35466 35480
Related OSVDB ID: 38193 38194 38196
VUPEN Advisory: ADV-2007-2563
Mail List Post: http://archives.neohapsis.com/archives/fulldisclosure/2007-07/0348.html
Vendor Specific News/Changelog Entry: http://ftp.digium.com/pub/asa/ASA-2007-015.pdf
Other Advisory URL: http://lists.debian.org/debian-security-announce/debian-security-announce-2007/msg00120.html
http://lists.opensuse.org/opensuse-security-announce/2007-08/msg00003.html
http://www.debian.org/security/2007/dsa-1358
http://www.gentoo.org/security/en/glsa/glsa-200802-11.xml
http://www.novell.com/linux/security/advisories/2007_15_sr.html

Tools & Filters

	25938 31294

Credit

Chris Clark - iSEC Partners
Zane Lackey - iSEC Partners

CVSSv2 Score

CVSSv2 Base Score = 5.0
Source: nvd.nist.gov | Generated: 2007-07-19 | Disagree?

Blogs

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