CVE-2017-5439

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 52.1 Firefox ESR versions prior to 52.1 Firefox ESR versions prior to 45.9 Firefox versions prior to 53

Description A use-after-free issue occurs during XSLT processing due to poor handling of template parameters, resulting in a potentially exploitable crash. The vulnerability is related to the nsTArray Length() function and is associated with the use of memory after it has been freed when processing XSLT documents. This could allow a remote attacker to cause a denial of service.

Recommendations For Thunderbird versions prior to 52.1, update to version 52.1 or later. For Firefox ESR versions prior to 52.1, update to version 52.1 or later. For Firefox ESR versions prior to 45.9, update to version 45.9 or later. For Firefox versions prior to 53, update to version 53 or later.