Taegeon Lee

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 63 Firefox ESR versions prior to 60.3 Thunderbird versions prior to 60.3 **Description** The issue is caused by memory safety bugs, including evidence of memory corruption, which could potentially be exploited to run arbitrary code with enough effort. It is also described as a buffer overflow in memory, allowing a remote attacker to execute arbitrary code. **Recommendations** For Firefox versions prior to 63, update to version 63 or later. For Firefox ESR versions prior to 60.3, update to version 60.3 or later. For Thunderbird versions prior to 60.3, update to version 60.3 or later.