CVE-2007-4924: Ekiga

Medium severity, CVSS 5.0. EPSS: 10.7% chance of exploitation in the next 30 days.

The Open Phone Abstraction Library (opal), as used by (1) Ekiga before 2.0.10 and (2) OpenH323 before 2.2.4, allows remote attackers to cause a denial of service (crash) via an invalid Content-Length header field in Session Initiation Protocol (SIP) packets, which causes a \0 byte to be written to an "attacker-controlled address."

Affected products

• Ekiga Ekiga: up to and including 2.0.9
• OPENH323 Project OPENH323: up to and including 2.2.3

Published 2007-10-08. Last modified 2026-06-16.