CVE-2017-9372: Digium Certified Asterisk

High severity, CVSS 7.5. EPSS: 4% chance of exploitation in the next 30 days.

PJSIP, as used in Asterisk Open Source 13.x before 13.15.1 and 14.x before 14.4.1, Certified Asterisk 13.13 before 13.13-cert4, and other products, allows remote attackers to cause a denial of service (buffer overflow and application crash) via a SIP packet with a crafted CSeq header in conjunction with a Via header that lacks a branch parameter.

Affected products

• Digium Certified Asterisk: version 13.13.0 only
• Digium Open Source: version 13.0.0 only; version 13.1.0 only; version 13.2.0 only; version 13.3.0 only; version 13.4.0 only; version 13.5.0 only; …

Published 2017-06-02. Last modified 2026-06-17.