CVE-2013-5641: Digium Asterisk

Medium severity, CVSS 5.0. EPSS: 4.1% chance of exploitation in the next 30 days.

The SIP channel driver (channels/chan_sip.c) in Asterisk Open Source 1.8.17.x through 1.8.22.x, 1.8.23.x before 1.8.23.1, and 11.x before 11.5.1 and Certified Asterisk 1.8.15 before 1.8.15-cert3 and 11.2 before 11.2-cert2 allows remote attackers to cause a denial of service (NULL pointer dereference, segmentation fault, and daemon crash) via an ACK with SDP to a previously terminated channel. NOTE: some of these details are obtained from third party information.

Affected products

• Digium Asterisk: version 1.8.17.0 only; version 1.8.18.0 only; version 1.8.18.1 only; version 1.8.19.0 only; version 1.8.19.1 only; version 1.8.20.0 only; …
• Digium Certified Asterisk: version 1.8.15 only; version 11.2.0 only

Published 2013-09-09. Last modified 2026-06-16.