CVE-2013-2686: Asterisk Certified Asterisk

Medium severity, CVSS 5.0. EPSS: 2.1% chance of exploitation in the next 30 days.

main/http.c in the HTTP server in Asterisk Open Source 1.8.x before 1.8.20.2, 10.x before 10.12.2, and 11.x before 11.2.2; Certified Asterisk 1.8.15 before 1.8.15-cert2; and Asterisk Digiumphones 10.x-digiumphones before 10.12.2-digiumphones does not properly restrict Content-Length values, which allows remote attackers to conduct stack-consumption attacks and cause a denial of service (daemon crash) via a crafted HTTP POST request. NOTE: this vulnerability exists because of an incorrect fix for CVE-2012-5976.

Affected products

• Asterisk Certified Asterisk: version 1.8.15 only; version 1.8.15.0 only
• Asterisk Digiumphones: version 10.0.0 only; version 10.1.0 only; version 10.2.0 only; version 10.3.0 only; version 10.4.0 only; version 10.5.0 only; …
• Asterisk Open Source: version 1.8.0 only; version 1.8.1 only; version 1.8.1.1 only; version 1.8.1.2 only; version 1.8.2 only; version 1.8.2.1 only; …

Published 2013-04-01. Last modified 2026-06-16.