DescriptionMozilla Firefox before 39.0, Firefox ESR 38.x before 38.1, and Thunderbird before 38.1 do not enforce key pinning upon encountering an X.509 certificate problem that generates a user dialog, which allows user-assisted man-in-the-middle attackers to bypass intended access restrictions by triggering a (1) expired certificate or (2) mismatched hostname for a domain with pinning enabled.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
icedove (PTS)jessie1:52.3.0-4~deb8u2fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
icedovesourcewheezy(not affected)
icedovesourcejessie(not affected)
iceweaselsourcewheezy(not affected)
iceweaselsourcejessie(not affected)


[jessie] - iceweasel <not-affected> (Only affects Firefox 38 and later)
[wheezy] - iceweasel <not-affected> (Only affects Firefox 38 and later)
[jessie] - icedove <not-affected> (Only affects Thunderbird 38 and later)
[wheezy] - icedove <not-affected> (Only affects Thunderbird 38 and later)

Search for package or bug name: Reporting problems