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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 3.96% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-787
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
- http://rhn.redhat.com/errata/RHSA-2016-1912.html
- http://www.debian.org/security/2016/dsa-3674
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.htmlVendor Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.securityfocus.com/bid/93049
- http://www.securitytracker.com/id/1036852
- https://bugzilla.mozilla.org/show_bug.cgi?id=1291016Issue Tracking
- 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://www.debian.org/security/2016/dsa-3674
- http://www.mozilla.org/security/announce/2016/mfsa2016-85.htmlVendor Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- http://www.securityfocus.com/bid/93049
- http://www.securitytracker.com/id/1036852
- https://bugzilla.mozilla.org/show_bug.cgi?id=1291016Issue Tracking
- 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.