Integer overflow in Mozilla Firefox
CVE-2016-5261
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.
Vulnerability class: Integer Overflow
EPSS: 0.042 (89.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Mozilla Firefox
- N/a — versions n/a
Weakness classification (CWE)
References
- security@mozilla.org (vdb-entry, x_refsource_SECTRACK)
- security@mozilla.org (x_refsource_CONFIRM)
- security@mozilla.org (x_refsource_CONFIRM)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory)
- security@mozilla.org (vendor-advisory, x_refsource_DEBIAN)
- security@mozilla.org (Permissions Required, x_refsource_CONFIRM, Issue Tracking)
- security@mozilla.org (vdb-entry, x_refsource_BID)
- security@mozilla.org (vendor-advisory, x_refsource_GENTOO)
- security@mozilla.org (x_refsource_REDHAT, vendor-advisory)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-5261?
- CVE-2016-5261 is a high-severity vulnerability in Mozilla Firefox, classified under Integer Overflow or Wraparound. CVSS score: 8.8/10. Published 2016-08-05.
- How severe is CVE-2016-5261?
- High severity. CVSS v3 base score is 8.8 out of 10.