Debian Security Advisory DSA 966-1 – Thomas Reifferscheid discovered that adzapper, a proxy advertisement zapper add-on, when installed as plugin in squid, the Internet object cache, can consume a lot of CPU resources and hence cause a denial of service on the proxy host.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/43701/dsa-966-1.txt
Source: https://packetstormsecurity.com/files/43701/Debian-Linux-Security-Advisory-966-1.html