CVE-2017-7753

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

Description An out-of-bounds read occurs when applying style rules to pseudo-elements, such as ::first-line, using cached style data. This issue can be exploited by a remote attacker to cause a denial of service.

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