Debian DSA-474-1: Critical Squid ACL Bypass Denial of Service Vulnerability

A vulnerability was discovered in squid, an Internet object cache,
whereby access control lists based on URLs could be bypassed
(CAN-2004-0189). Two other bugs were also fixed with patches
squid-2.4.STABLE7-url_escape.patch (a buffer overrun which does not
appear to be exploitable) and squid-2.4.STABLE7-url_port.patch (a
potential denial of service).

For the stable distribution (woody) these problems have been fixed in
version 2.4.6-2woody2.

For the unstable distribution (sid) these problems have been fixed in
version 2.5.5-1.

We recommend that you update your squid package.

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, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper...