USN-1713-1: Squid vulnerabilities

31 January 2013

squid-cgi could consume excessive system resources, leading to a denial of service attack on it and other hosted services.

Releases

Packages

  • squid - Internet object cache (WWW proxy cache)
  • squid3 - Full featured Web Proxy cache (HTTP proxy)

Details

It was discovered that squid's cachemgr.cgi was vulnerable to excessive
resource use. A remote attacker could exploit this flaw to perform a denial
of service attack on the server and other hosted services. (CVE-2012-5643)

It was discovered that the patch for CVE-2012-5643 was incorrect. A
remote attacker could exploit this flaw to perform a denial of service
attack. (CVE-2013-0189)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.10
Ubuntu 12.04
Ubuntu 11.10
Ubuntu 10.04

In general, a standard system update will make all the necessary changes.
Ensure the webserver access controls properly restrict access to cachemgr.cgi.