CVE-2017-7793

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 56 Firefox ESR versions prior to 52.4 Thunderbird versions prior to 52.4

Description A use-after-free issue can occur in the Fetch API when the worker or the associated window are freed while still in use, potentially leading to a crash. This issue may allow a remote attacker to cause a denial of service.

Recommendations For Firefox versions prior to 56, update to version 56 or later. For Firefox ESR versions prior to 52.4, update to version 52.4 or later. For Thunderbird versions prior to 52.4, update to version 52.4 or later.