Improper input validation in Mozilla Firefox
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 server certificate for addons.mozilla.org signed by an arbitrary built-in Certification Authority.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.024 (83.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000
Affected products
- Mozilla Firefox — versions 45.0, 45.0.1, 45.0.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- www.mozilla.org/security/announce/2016/mfsa2016-85.html (Release Notes)
- www.mozilla.org/security/advisories/mfsa2016-86/
- blog.mozilla.org/security/2016/09/16/update-on-add-on-pinning-vulnerability/ (VDB Entry, Third Party Advisory)
- hackernoon.com/tor-browser-exposed-anti-privacy-implantation-at-mass-scale-bd68… (Technical Description)
- www.debian.org/security/2016/dsa-3674 (vendor-advisory)
- bugzilla.mozilla.org/show_bug.cgi (VDB Entry, Third Party Advisory, Issue Tracking)
- seclists.org/dailydave/2016/q3/51 (mailing-list, Third Party Advisory)
- security.gentoo.org/glsa/201701-15 (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-1912.html (vendor-advisory)
Frequently asked questions
- What is CVE-2016-5284?
- CVE-2016-5284 is a high-severity vulnerability in Mozilla Firefox, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2016-09-22.
- How severe is CVE-2016-5284?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2016-5284 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.