squid-cgi could consume excessive system resources, leading to a denial of service attack on it and other hosted services.
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)
31 January 2013
A security issue affects these releases of Ubuntu and its derivatives:
squid-cgi could consume excessive system resources, leading to a denial of service attack on it and other hosted services.
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)
The problem can be corrected by updating your system to the following package versions:
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.
Vulmon