CVE-2016-5284
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.37%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.4 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
- EPSS
- 2.37% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
- http://rhn.redhat.com/errata/RHSA-2016-1912.html
- http://seclists.org/dailydave/2016/q3/51Third Party Advisory
- http://www.debian.org/security/2016/dsa-3674
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.htmlRelease Notes
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.securityfocus.com/bid/93049
- http://www.securitytracker.com/id/1036852
- https://blog.mozilla.org/security/2016/09/16/update-on-add-on-pinning-vulnerability/Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1303127Issue Tracking, Third Party Advisory, VDB Entry
- https://hackernoon.com/tor-browser-exposed-anti-privacy-implantation-at-mass-scale-bd68e9eb1e95Technical Description
- https://security.gentoo.org/glsa/201701-15
- https://www.mozilla.org/security/advisories/mfsa2016-86/
- https://www.mozilla.org/security/advisories/mfsa2016-88/
- http://rhn.redhat.com/errata/RHSA-2016-1912.html
- http://seclists.org/dailydave/2016/q3/51Third Party Advisory
- http://www.debian.org/security/2016/dsa-3674
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.htmlRelease Notes
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.securityfocus.com/bid/93049
- http://www.securitytracker.com/id/1036852
- https://blog.mozilla.org/security/2016/09/16/update-on-add-on-pinning-vulnerability/Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1303127Issue Tracking, Third Party Advisory, VDB Entry
- https://hackernoon.com/tor-browser-exposed-anti-privacy-implantation-at-mass-scale-bd68e9eb1e95Technical Description
- https://security.gentoo.org/glsa/201701-15
- https://www.mozilla.org/security/advisories/mfsa2016-86/
- https://www.mozilla.org/security/advisories/mfsa2016-88/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.