Description
The Public Key Pinning (PKP) implementation in Mozilla Firefox before 33.0 skips pinning checks upon an unspecified issuer-verification error, which makes it easier for remote attackers to bypass an intended pinning configuration and spoof a web site via a crafted certificate that leads to presentation of the Untrusted Connection dialog to the user.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 33.0+build2-0ubuntu0.14.04.1 | USN-2372-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
Advisories 2
- USN-2372-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- openSUSE-SU-2014:1344 vendor-advisory
- FEDORA-2014-13042 vendor-advisory
- http://www.mozilla.org/security/announce/2014/mfsa2014-80.html
- 1031028 vdb-entry
- openSUSE-SU-2014:1345 vendor-advisory
- 70434 vdb-entry
- GLSA-201504-01 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1066190
- FEDORA-2014-14084 vendor-advisory
- USN-2372-1 vendor-advisory
- 62022 third-party-advisory
- 62023 third-party-advisory