Use After Free in Mozilla Firefox
CVE-2016-5254
Use-after-free vulnerability in the nsXULPopupManager::KeyDown function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows attackers to execute arbitrary code or cause a denial of service (heap memory corruption and application crash) by leveraging keyboard access to use the Alt key during selection of top-level menu items.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.030 (86.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Mozilla Firefox — versions 45.1.0, 45.1.1, 45.2.0
- Oracle Linux — versions 5.0, 6, 7
Weakness classification (CWE)
References
- www.debian.org/security/2016/dsa-3640 (vendor-advisory)
- www.securitytracker.com/id/1036508 (vdb-entry)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html (Third Party Advisory)
- www.mozilla.org/security/announce/2016/mfsa2016-70.html (Vendor Advisory)
- www.ubuntu.com/usn/USN-3044-1 (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-1551.html (vendor-advisory)
- security.gentoo.org/glsa/201701-15 (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html (vendor-advisory)
- www.securityfocus.com/bid/92261 (vdb-entry)
Frequently asked questions
- What is CVE-2016-5254?
- CVE-2016-5254 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2016-08-05.
- How severe is CVE-2016-5254?
- Critical severity. CVSS v3 base score is 9.8 out of 10.