CVE-2007-2297: Asterisk

High severity, CVSS 7.8. EPSS: 2.4% chance of exploitation in the next 30 days.

The SIP channel driver (chan_sip) in Asterisk before 1.2.18 and 1.4.x before 1.4.3 does not properly parse SIP UDP packets that do not contain a valid response code, which allows remote attackers to cause a denial of service (crash).

Affected products

• Asterisk Asterisk: version 1.2.0_beta1 only; version 1.2.0_beta2 only; version 1.2.10 only; version 1.2.11 only; version 1.2.12 only; version 1.2.13 only; …

Published 2007-04-26. Last modified 2026-06-16.