Buffer overflow in Mozilla Firefox
CVE-2016-5270
Heap-based buffer overflow in the nsCaseTransformTextRunFactory::TransformString function in Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird < 45.4 allows remote attackers to cause a denial of service (boolean out-of-bounds write) or possibly have unspecified other impact via Unicode characters that are mishandled during text conversion.
Vulnerability class: Buffer Overflow
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: 0.040 (90.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000
Affected products
- Mozilla Firefox — versions 45.1.0, 45.1.1, 45.2.0
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 (Vendor Advisory)
- www.mozilla.org/security/advisories/mfsa2016-86/
- www.debian.org/security/2016/dsa-3674 (vendor-advisory)
- bugzilla.mozilla.org/show_bug.cgi (Issue Tracking)
- security.gentoo.org/glsa/201701-15 (vendor-advisory)
- rhn.redhat.com/errata/RHSA-2016-1912.html (vendor-advisory)
- www.mozilla.org/security/advisories/mfsa2016-88/
- www.securityfocus.com/bid/93049 (vdb-entry)
- www.securitytracker.com/id/1036852 (vdb-entry)
Frequently asked questions
- What is CVE-2016-5270?
- CVE-2016-5270 is a critical-severity vulnerability in Mozilla Firefox, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2016-09-22.
- How severe is CVE-2016-5270?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2016-5270 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.