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Test your applicationsUpgrade Ubuntu:20.04
firefox
to version 133.0+build2-0ubuntu0.20.04.1 or higher.
Note: Versions mentioned in the description apply only to the upstream firefox
package and not the firefox
package as distributed by Ubuntu
.
See How to fix?
for Ubuntu:20.04
relevant fixed versions and status.
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.