Use After Free in Mozilla Firefox
CVE-2017-5402
A use-after-free can occur when events are fired for a "FontFace" object after the object has been already been destroyed while working with fonts. This results in a potentially exploitable crash. This vulnerability affects Firefox < 52, Firefox ESR < 45.8, Thunderbird < 52, and Thunderbird < 45.8.
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: 0.029 (86.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Thunderbird — versions unspecified
- Debian Linux — versions 9.0
- Red Hat Enterprise Linux — versions 5.0, 6.0, 7.0
- Red Hat Enterprise Linux Desktop — versions 5.0, 6.0, 7.0
- Red Hat Enterprise Linux Server — versions 5.0, 6.0, 7.0
- Red Hat Enterprise Linux Server Aus — versions 7.3, 7.4
- Red Hat Enterprise Linux Server Eus — versions 7.3, 7.4, 7.5
- Red Hat Enterprise Linux Workstation — versions 5.0, 6.0, 7.0
Weakness classification (CWE)
References
- bugzilla.mozilla.org/show_bug.cgi (Patch, Issue Tracking, Vendor Advisory)
- rhn.redhat.com/errata/RHSA-2017-0459.html (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2017-09/ (Vendor Advisory)
- www.debian.org/security/2017/dsa-3832 (vendor-advisory, Third Party Advisory)
- www.mozilla.org/security/advisories/mfsa2017-07/ (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2017-05/ (Vendor Advisory)
- www.securitytracker.com/id/1037966 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/96664 (VDB Entry, Third Party Advisory, vdb-entry)
- security.gentoo.org/glsa/201705-06 (vendor-advisory, Third Party Advisory)
- rhn.redhat.com/errata/RHSA-2017-0461.html (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-5402?
- CVE-2017-5402 is a critical-severity vulnerability in Mozilla Firefox, classified under Use After Free. CVSS score: 9.8/10. Published 2018-06-11.
- How severe is CVE-2017-5402?
- Critical severity. CVSS v3 base score is 9.8 out of 10.