CVE-2016-2232: Digium Asterisk

Medium severity, CVSS 6.5. EPSS: 4.9% chance of exploitation in the next 30 days.

Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3 allow remote authenticated users to cause a denial of service (uninitialized pointer dereference and crash) via a zero length error correcting redundancy packet for a UDPTL FAX packet that is lost.

Affected products

• Digium Asterisk: 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; …
• Digium Certified Asterisk: version 1.8.28 only; version 11.6 only; version 11.6.0 only; version 13.1 only; version 13.1.0 only

Published 2016-02-22. Last modified 2026-06-17.