Integer Overflow or Wraparound Affecting firefox-esr package, versions <45.4.0esr-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-DEBIAN14-FIREFOXESR-11742357
- published10 Aug 2025
- disclosed5 Aug 2016
Introduced: 5 Aug 2016
CVE-2016-5261 (opens in a new tab)How to fix?
Upgrade Debian:14 firefox-esr to version 45.4.0esr-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian.
See How to fix? for Debian:14 relevant fixed versions and status.
Integer overflow in the WebSocketChannel class in the WebSockets subsystem in Mozilla Firefox before 48.0 and Firefox ESR < 45.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted packets that trigger incorrect buffer-resize operations during buffering.
References
- https://security-tracker.debian.org/tracker/CVE-2016-5261
- http://www.debian.org/security/2016/dsa-3674
- https://security.gentoo.org/glsa/201701-15
- https://www.mozilla.org/security/advisories/mfsa2016-86/
- http://www.mozilla.org/security/announce/2016/mfsa2016-75.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1287266
- http://rhn.redhat.com/errata/RHSA-2016-1912.html
- http://www.securityfocus.com/bid/92260
- http://www.securitytracker.com/id/1036508
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-5261
- http://www.ubuntu.com/usn/USN-3044-1