Digium · Asterisk Open Source · CVE-2009-2651
**Name of the Vulnerable Software and Affected Versions**
Asterisk Open Source version 1.6.1
**Description**
The issue allows remote attackers to cause a denial of service, resulting in a crash. This occurs when an RTP text frame without a certain delimiter is sent, triggering a NULL pointer dereference and the subsequent calculation of an invalid pointer.
**Recommendations**
For Asterisk Open Source version 1.6.1, update to version 1.6.1.2 to resolve the issue.