Ezra

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 25.0 Firefox ESR versions 24.x prior to 24.1 Thunderbird versions prior to 24.1 SeaMonkey versions prior to 2.22 **Description** The issue arises from the cycle collection implementation not properly determining the thread for release of an image object. This allows remote attackers to execute arbitrary code or cause a denial of service via a large HTML document containing IMG elements, potentially leading to a race condition and application crash. **Recommendations** For Mozilla Firefox versions prior to 25.0, update to version 25.0 or later. For Firefox ESR versions 24.x prior to 24.1, update to version 24.1 or later. For Thunderbird versions prior to 24.1, update to version 24.1 or later. For SeaMonkey versions prior to 2.22, update to version 2.22 or later.