CVE-2009-2346: Asterisk Appliance s800i

High severity, CVSS 7.8. EPSS: 2.6% chance of exploitation in the next 30 days.

The IAX2 protocol implementation in Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.2, 1.6.0.x before 1.6.0.15, and 1.6.1.x before 1.6.1.6; Business Edition B.x.x before B.2.5.10, C.2.x before C.2.4.3, and C.3.x before C.3.1.1; and s800i 1.3.x before 1.3.0.3 allows remote attackers to cause a denial of service (call-number exhaustion) by initiating many IAX2 message exchanges, a related issue to CVE-2008-3263.

Affected products

• Asterisk Appliance s800i: version 1.3 only; version 1.3.0.2 only
• Asterisk Asterisk: version b.1.3.2 only; version b.1.3.3 only; version b.2.2.0 only; version b.2.2.1 only; version b.2.3.1 only; version b.2.3.2 only; …
• Asterisk Open Source: version 1.2.0 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.4 only; version 1.2.5 only; …
• Asterisk Opensource: version 1.4.23.2 only; version 1.4.24 only; version 1.4.24.1 only; version 1.4.26 only; version 1.4.26.1 only
• Sangoma Asterisk: version 1.6.1 only; version 1.6.1.4 only

Published 2009-09-08. Last modified 2026-06-16.