CVE-2011-1175: Digium Asterisk

Medium severity, CVSS 5.0. EPSS: 2.7% chance of exploitation in the next 30 days.

tcptls.c in the TCP/TLS server in Asterisk Open Source 1.6.1.x before 1.6.1.23, 1.6.2.x before 1.6.2.17.1, and 1.8.x before 1.8.3.1 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) by establishing many short TCP sessions to services that use a certain TLS API.

Affected products

• Digium Asterisk: version 1.6.1 only; version 1.6.1.0 only; version 1.6.1.1 only; version 1.6.1.2 only; version 1.6.1.3 only; version 1.6.1.4 only; …

Published 2011-03-31. Last modified 2026-06-16.