CVE-2007-4455: Asterisk

Medium severity, CVSS 5.0. EPSS: 1.8% chance of exploitation in the next 30 days.

The SIP channel driver (chan_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Asterisk Appliance Developer Kit 0.x before 0.8.0, and s800i (Asterisk Appliance) 1.x before 1.0.3 allows remote attackers to cause a denial of service (memory exhaustion) via a SIP dialog that causes a large number of history entries to be created.

Affected products

• Asterisk Asterisk: up to and including 1.4.9
• Asterisk Asterisk Appliance Developer Kit: up to and including 0.7
• Asterisk Asterisknow: up to and including beta_6

Published 2007-08-22. Last modified 2026-06-16.