GLSA 200704-01: Asterisk: Two SIP Denial of Service vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	Asterisk: Two SIP Denial of Service vulnerabilities
Date:	04/02/2007
Bugs:	#171467
ID:	200704-01

Synopsis

Asterisk is vulnerable to two Denial of Service issues in the SIP channel.

Background

Asterisk is an open source implementation of a telephone private branch exchange (PBX).

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/asterisk	< 1.2.14-r2	>= 1.2.14-r2	All supported architectures

Description

The Madynes research team at INRIA has discovered that Asterisk contains a null pointer dereferencing error in the SIP channel when handling INVITE messages. Furthermore qwerty1979 discovered that Asterisk 1.2.x fails to properly handle SIP responses with return code 0.

Impact

A remote attacker could cause an Asterisk server listening for SIP messages to crash by sending a specially crafted SIP message or answering with a 0 return code.

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

Note: Asterisk 1.0.x is no longer supported upstream so users should consider upgrading to Asterisk 1.2.x.

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200704-01.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.