Ubuntu Security Notice USN-1713-1
30th January, 2013
squid, squid3 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 11.10
- Ubuntu 10.04 LTS
squid-cgi could consume excessive system resources, leading to a denial of service attack on it and other hosted services.
- squid - Internet object cache (WWW proxy cache)
- squid3 - Full featured Web Proxy cache (HTTP proxy)
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)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 12.10:
- squid-cgi 3.1.20-1ubuntu1.1
- Ubuntu 12.04 LTS:
- squid-cgi 3.1.19-1ubuntu3.12.04.2
- Ubuntu 11.10:
- squid-cgi 3.1.14-1ubuntu0.3
- Ubuntu 10.04 LTS:
- squid-cgi 2.7.STABLE7-1ubuntu12.6
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
In general, a standard system update will make all the necessary changes.
Ensure the webserver access controls properly restrict access to cachemgr.cgi.