CVE-2021-29985

Name of the Vulnerable Software and Affected Versions Thunderbird versions prior to 78.13 Thunderbird versions prior to 91 Firefox ESR versions prior to 78.13 Firefox versions prior to 91

Description The issue is related to a use-after-free error in the MediaCacheStream::NotifyDataReceived method, which can lead to memory corruption. This could potentially allow a remote attacker to trick a user into opening a specially crafted web page, resulting in the execution of arbitrary code on the target system. The estimated number of potentially affected devices is not specified.

Recommendations For Thunderbird versions prior to 78.13, update to version 78.13 or later. For Thunderbird versions prior to 91, update to version 91 or later. For Firefox ESR versions prior to 78.13, update to version 78.13 or later. For Firefox versions prior to 91, update to version 91 or later.