lighttpd - security update

Dominic Scheirlinck and Scott Geary of Vend reported an insecure
behaviour in the lighttpd web server. Lighttpd assigned Proxy header
values from client requests to internal HTTP_PROXY environment
variables. This could be used to carry out Man in the Middle Attacks
(MIDM) or create connections to arbitrary hosts.

For Debian 7 Wheezy, this issue has been fixed in version
1.4.31-4+deb7u5.

We recommend that you upgrade your lighttpd packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;