| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | = 45.0= 45.0.1= 45.0.2= 45.1.1= 45.2.0= 45.3.0≤ 48.0.2 |
Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 rely on unintended expiration dates for Preloaded Public Key Pinning, which allows man-in-the-middle attackers to spoof add-on updates by leveraging possession of an X.509 server certificate for addons.mozilla.org signed by an arbitrary built-in Certification Authority.
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