Debian: DSA-1884-1 Critical: Nginx Buffer Underflow Remote Code Execute

Chris Ries discovered that nginx, a high-performance HTTP server, reverse
proxy and IMAP/POP3 proxy server, is vulnerable to a buffer underflow when
processing certain HTTP requests. An attacker can use this to execute
arbitrary code with the rights of the worker process (www-data on Debian)
or possibly perform denial of service attacks by repeatedly crashing
worker processes via a specially crafted URL in an HTTP request.


For the oldstable distribution (etch), this problem has been fixed in
version 0.4.13-2+etch2.

For the stable distribution (lenny), this problem has been fixed in
version 0.6.32-3+lenny2.

For the testing distribution (squeeze), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 0.7.61-3.


We recommend that you upgrade your nginx packages.

Upgrade instructions
- --------------------

wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager...