CVE-2009-4055: Digium Asterisk

Medium severity, CVSS 5.0. EPSS: 2.8% chance of exploitation in the next 30 days.

rtp.c in Asterisk Open Source 1.2.x before 1.2.37, 1.4.x before 1.4.27.1, 1.6.0.x before 1.6.0.19, and 1.6.1.x before 1.6.1.11; Business Edition B.x.x before B.2.5.13, C.2.x.x before C.2.4.6, and C.3.x.x before C.3.2.3; and s800i 1.3.x before 1.3.0.6 allows remote attackers to cause a denial of service (daemon crash) via an RTP comfort noise payload with a long data length.

Affected products

• Digium Asterisk: version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.10 only; version 1.2.11 only; …
• Digium s800i: version 1.3.0 only; version 1.3.0.2 only; version 1.3.0.3 only; version 1.3.0.4 only

Published 2009-12-02. Last modified 2026-06-16.