firefox-esr - security update

Multiple security issues have been found in the Mozilla Firefox web
browser: Multiple memory safety errors, buffer overflows and other
implementation errors may lead to the execution of arbitrary code or
bypass of the same-origin policy.

A man-in-the-middle attack in the addon update mechanism has been fixed.

A use-after-free vulnerability in the SVG Animation was discovered,
allowing a remote attacker to cause a denial of service (application
crash) or execute arbitrary code, if a user is tricked into opening a
specially crafted website.

For Debian 7 Wheezy, these problems have been fixed in version
45.5.1esr-1~deb7u1.

We recommend that you upgrade your firefox-esr 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;