Squid 'DNS' Reply Remote Denial of Service Vulnerability

Bugtraq ID:	42645
Class:	Failure to Handle Exceptional Conditions
CVE:	CVE-2010-2951
Remote:	Yes
Local:	No
Published:	Aug 24 2010 12:00AM
Updated:	Apr 13 2015 10:19PM
Credit:	Jan iankko Lieskovsky
Vulnerable:	Squid Web Proxy Cache 3.1.6 Gentoo Linux
Not Vulnerable:	Squid Web Proxy Cache 3.1.7

Squid 'DNS' Reply Remote Denial of Service Vulnerability

Squid is prone to a remote denial-of-service vulnerability.

An attacker can exploit this issue to cause a denial-of-service condition.

Squid 3.1.6 is vulnerable; other versions may also be affected.

Update (October 14, 2010): This issue was originally documented as a buffer overflow. It was determined that the issue was instead a denial-of-service vulnerability stemming from an assertion failure; impact has been adjusted accordingly.

Squid 'DNS' Reply Remote Denial of Service Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected]

Squid 'DNS' Reply Remote Denial of Service Vulnerability

Solution:
Updates are available. Please see the references for more information.

Squid 'DNS' Reply Remote Denial of Service Vulnerability

References:

• Bug 3021 - Large DNS reply causes crash when no ipv6 resolver present (Stephen Thorne)
  
• Bug 626927 - Squid: Buffer overread when processing large DNS replies with no IP (Red Hat)
  
• Squid 3.1.7 is available (Amos Jeffries)