Arch Linux: 201612-1 Critical: Firefox Exploit and Policy Bypass

The package firefox before version 50.0.2-1 is vulnerable to multiple issues including arbitrary code execution and same-origin policy bypass.

Arch Linux Security Advisory ASA-201612-1
========================================
Severity: Critical
Date    : 2016-12-01
CVE-ID  : CVE-2016-9078 CVE-2016-9079
Package : firefox
Type    : multiple issues
Remote  : Yes
Link    : https://wiki.archlinux.org/title/CVE

Summary
======
The package firefox before version 50.0.2-1 is vulnerable to multiple
issues including arbitrary code execution and same-origin policy
bypass.

Resolution
=========
Upgrade to 50.0.2-1.

# pacman -Syu "firefox>=50.0.2-1"

The problems have been fixed upstream in version 50.0.2.

Workaround
=========
None.

Description
==========
- CVE-2016-9078 (same-origin policy bypass)

Redirection from an HTTP connection to a data: URL assigns the
referring site's origin to the data: URL in some circumstances. This
can result in same-origin violations against a domain if it loads
resources from malicious sites. Cross-origin setting of cookies has
been demonstrated without the ability to read them.

- CVE-2016-9079 (arbitrary code execution)

A use-after-free vulnerability has been discovered in the SVG Animation
component of Firefox, leading to arbitrary code execution.

Impact
=====
A remote attacker can bypass the same-origin policy and execute
arbitrary code on the affected host.

References
=========
https://www.mozilla.org/en-US/security/advisories/mfsa2016-91/
https://www.mozilla.org/en-US/security/advisories/mfsa2016-92/
https://access.redhat.com/security/cve/CVE-2016-9078
https://access.redhat.com/security/cve/CVE-2016-9079