CVE-2015-2741

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-07-06 · updated 2026-06-17
Weakness: CWE-310

Description

Mozilla 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.

Affected products

Mozilla Firefox: through 38.1.0; 31.0, 31.1.0, 31.1.1, 31.3.0, 31.5.1, 31.5.2 (+2)
Mozilla Firefox ESR: 31.1, 31.2, 31.3, 31.4, 31.5, 31.6.0 (+1)
Oracle Corporation Solaris Operating System: 11.3

References

http://lists.opensuse.org/opensuse-security-announce/2015-07/msg00025.html
http://rhn.redhat.com/errata/RHSA-2015-1207.html
http://rhn.redhat.com/errata/RHSA-2015-1455.html
http://www.mozilla.org/security/announce/2015/mfsa2015-67.html
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.securityfocus.com/bid/75541
http://www.securitytracker.com/id/1032783
http://www.securitytracker.com/id/1032784
http://www.ubuntu.com/usn/USN-2656-1
http://www.ubuntu.com/usn/USN-2656-2
https://bugzilla.mozilla.org/show_bug.cgi?id=1147497

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