| Name | CVE-2009-2651 | 
| Description | main/rtp.c in Asterisk Open Source 1.6.1 before 1.6.1.2 allows remote attackers to cause a denial of service (crash) via an RTP text frame without a certain delimiter, which triggers a NULL pointer dereference and the subsequent calculation of an invalid pointer. | 
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) | 
| Debian Bugs | 539473 | 
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status | 
|---|
| asterisk (PTS) | bullseye | 1:16.28.0~dfsg-0+deb11u4 | fixed | 
 | bullseye (security) | 1:16.28.0~dfsg-0+deb11u8 | fixed | 
 | sid | 1:22.6.0~dfsg+~cs6.15.60671435-1 | fixed | 
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs | 
|---|
| asterisk | source | etch | (not affected) |  |  |  | 
| asterisk | source | lenny | (not affected) |  |  |  | 
| asterisk | source | squeeze | (not affected) |  |  |  | 
| asterisk | source | (unstable) | 1:1.6.2.0~dfsg~rc1-1 | low |  | 539473 | 
Notes
[etch] - asterisk <not-affected> (Vulnerable code not present)
[lenny] - asterisk <not-affected> (Vulnerable code not present)
[squeeze] - asterisk <not-affected> (Vulnerable code not present)
AST-2009-004