🕵️ Mozilla Firefox ESR/Thunderbird/Thunderbird ESR up to 52.7 UTF8 Use-After-Free memory corruption

A vulnerability was found in Mozilla Firefox ESR, Thunderbird and Thunderbird ESR up to 52.7 (Mail Client Software). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the component UTF8 Handler. Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability. ...