CVE-2017-16672: Digium Asterisk

Medium severity, CVSS 5.9. EPSS: 4.7% chance of exploitation in the next 30 days.

An issue was discovered in Asterisk Open Source 13 before 13.18.1, 14 before 14.7.1, and 15 before 15.1.1 and Certified Asterisk 13.13 before 13.13-cert7. A memory leak occurs when an Asterisk pjsip session object is created and that call gets rejected before the session itself is fully established. When this happens the session object never gets destroyed. Eventually Asterisk can run out of memory and crash.

Affected products

• Digium Asterisk: from 13.0.0, before 13.18.1 (fixed in 13.18.1); from 14.0.0, before 14.7.1 (fixed in 14.7.1); from 15.0.0, before 15.1.1 (fixed in 15.1.1)
• Digium Certified Asterisk: version 13.13.0 only

Published 2017-11-09. Last modified 2026-06-17.