Debian Security Advisory DSA 2802-1 (nginx - restriction bypass)

Summary
Ivan Fratric of the Google Security Team discovered a bug in nginx, a web server, which might allow an attacker to bypass security restrictions by using a specially crafted request. The oldstable distribution (squeeze) is not affected by this problem.
Solution
For the stable distribution (wheezy), this problem has been fixed in version 1.2.1-2.2+wheezy2. For the unstable distribution (sid), this problem has been fixed in version 1.4.4-1. We recommend that you upgrade your nginx packages.
Insight
Nginx ('engine X') is a high-performance web and reverse proxy server created by Igor Sysoev. It can be used both as a standalone web server and as a proxy to reduce the load on back-end HTTP or mail servers.
Affected
nginx on Debian Linux
Detection
This check tests the installed software version using the apt package manager.
References