CVE-2008-3263: Asterisk

High severity, CVSS 7.8. EPSS: 28% chance of exploitation in the next 30 days.

The IAX2 protocol implementation in Asterisk Open Source 1.0.x, 1.2.x before 1.2.30, and 1.4.x before 1.4.21.2; Business Edition A.x.x, B.x.x before B.2.5.4, and C.x.x before C.1.10.3; AsteriskNOW; Appliance Developer Kit 0.x.x; and s800i 1.0.x before 1.2.0.1 allows remote attackers to cause a denial of service (call-number exhaustion and CPU consumption) by quickly sending a large number of IAX2 (IAX) POKE requests.

Affected products

• Asterisk Asterisk: version 0.1.0 only; version 0.1.1 only; version 0.1.2 only; version 0.1.3 only; version 0.1.4 only; version 0.1.5 only; …

Published 2008-07-22. Last modified 2026-06-16.