CVE-2017-7800

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 55 Firefox ESR versions prior to 52.3 Thunderbird versions prior to 52.3

Description The issue is related to a use-after-free vulnerability in the implementation of WebSockets technology. This vulnerability can be exploited by a remote attacker to cause a denial of service, resulting in a crash. The vulnerability occurs when the object holding the connection is freed before the disconnection operation is finished.

Recommendations For Firefox versions prior to 55, update to version 55 or later to resolve the issue. For Firefox ESR versions prior to 52.3, update to version 52.3 or later to resolve the issue. For Thunderbird versions prior to 52.3, update to version 52.3 or later to resolve the issue.