An update for thunderbird 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 Important. 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.
Mozilla Thunderbird is a standalone mail and newsgroup client.
This update upgrades Thunderbird to version 45.4.0.
* Multiple flaws were found in the processing of malformed web content. A web page containing malicious content could cause Thunderbird to crash or, potentially, execute arbitrary code with the privileges of the user running Thunderbird. (CVE-2016-5257)
Red Hat would like to thank the Mozilla project for reporting these issues. Upstream acknowledges Christoph Diehl, Andrew McCreight, Dan Minor, Byron Campen, Jon Coppeard, Steve Fink, Tyson Smith, Philipp and Carsten Book as the original reporters.
Bug 1377543 – (CVE-2016-5257) CVE-2016-5257