6.8 - RHSA-2016:1217

Problem Description:

An update for firefox is now available for Red Hat Enterprise Linux 5, Red Hat Enterprise Linux 6, and Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ppc, s390x, x86_64 Red Hat Enterprise Linux Client (v. 7) - x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64 Red Hat Enterprise Linux Desktop Optional (v. 6) - x86_64 Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64 Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 6) - ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64 Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 6) - x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

Mozilla Firefox is an open source web browser.

This update upgrades Firefox to version 45.2.0 ESR.

Security Fix(es):

* Multiple flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox. (CVE-2016-2818, CVE-2016-2819, CVE-2016-2821, CVE-2016-2822, CVE-2016-2828, CVE-2016-2831)

Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges sushi Anton Larsson, firehack, Jordi Chancel, Christian Holler, Sylvestre Ledru, Tyson Smith, jomo, Jesse Ruderman, Julian Seward, Timothy Nikkel, Karl Tomlinson, Olli Pettay, and Gary Kwong as the original reporters.

4. Solution:

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing the update, Firefox must be restarted for the changes to take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1342887 - CVE-2016-2818 Mozilla: Miscellaneous memory safety hazards (rv:45.2) (MFSA 2016-49) 1342891 - CVE-2016-2819 Mozilla: Buffer overflow parsing HTML5 fragments (MFSA 2016-50) 1342892 - CVE-2016-2821 Mozilla: Use-after-free deleting tables from a contenteditable document (MFSA 2016-51) 1342893 - CVE-2016-2822 Mozilla: Addressbar spoofing though the SELECT element (MFSA 2016-52) 1342895 - CVE-2016-2828 Mozilla: Use-after-free when textures are used in WebGL operations after recycle pool destruction (MFSA 2016-56) 1342898 - CVE-2016-2831 Mozilla: Entering fullscreen and persistent pointerlock without user permission permission (MFSA 2016-59)