Andrew Sutherland

**Name of the Vulnerable Software and Affected Versions** Firefox versions prior to 84 **Description** The issue occurs when a HTTPS page is embedded in a HTTP page and a service worker is registered for the secure page. In such cases, the service worker could intercept the request for the secure page, despite the iframe not being a secure context due to the insecure framing. **Recommendations** For versions prior to 84, update to version 84 or later to resolve the issue. As a temporary workaround, consider disabling service workers for secure pages embedded in insecure contexts until a patch is available. Restrict access to sensitive information on secure pages to minimize the risk of exploitation.

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 41.0 Mozilla Firefox ESR versions prior to 38.3 **Description** The issue is related to a use-after-free vulnerability in the HTMLVideoElement interface, which can be exploited by remote attackers to execute arbitrary code via crafted JavaScript code. This code modifies the URI table of a media element. **Recommendations** For Mozilla Firefox versions prior to 41.0, update to version 41.0 or later. For Mozilla Firefox ESR versions prior to 38.3, update to version 38.3 or later.

**Name of the Vulnerable Software and Affected Versions** Mozilla Firefox versions prior to 15.0 Firefox ESR versions prior to 10.0.7 Thunderbird versions prior to 15.0 Thunderbird ESR versions prior to 10.0.7 SeaMonkey versions prior to 2.12 **Description** The issue allows remote attackers to cause a denial of service, resulting in memory corruption and application crash, or possibly execute arbitrary code via unknown vectors. **Recommendations** For Mozilla Firefox versions prior to 15.0, update to version 15.0 or later. For Firefox ESR versions prior to 10.0.7, update to version 10.0.7 or later. For Thunderbird versions prior to 15.0, update to version 15.0 or later. For Thunderbird ESR versions prior to 10.0.7, update to version 10.0.7 or later. For SeaMonkey versions prior to 2.12, update to version 2.12 or later.