squid - security update

A security issue has been discovered in the Squid chaching proxy, on its
2.7.STABLE9 version branch.

• CVE-2016-4554
  Jianjun Chen found that Squid was vulnerable to a header smuggling
  attack that could lead to cache poisoning and to bypass of same-origin
  security policy in Squid and some client browsers.

For Debian 7 Wheezy, this issue has been fixed in version
2.7.STABLE9-4.1+deb7u2.

We recommend that you upgrade your squid 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;