Description
The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature verification. This flaw, triggered by an invalid or unsupported extension manifest, could have caused runtime errors that disrupted the signature validation process. As a result, the enforcement of signature validation for unrelated add-ons may have been bypassed. Signature validation in this context is used to ensure that third-party applications on the user's computer have not tampered with the user's extensions, limiting the impact of this issue. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.
Problem types
Unhandled Exception in Add-on Signature Verification
Product status
Credits
Rob Wu
References
lists.debian.org/debian-lts-announce/2024/11/msg00029.html
bugzilla.mozilla.org/show_bug.cgi?id=1929600
www.mozilla.org/security/advisories/mfsa2024-63/
www.mozilla.org/security/advisories/mfsa2024-64/
www.mozilla.org/security/advisories/mfsa2024-67/
