Description
Asterisk 1.4 before 1.4.1 and 1.2 before 1.2.16 allows remote attackers to cause a denial of service (crash) by sending a Session Initiation Protocol (SIP) packet without a URI and SIP-version header, which results in a NULL pointer dereference.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | asterisk | 1:1.2.16~dfsg-1 | — |
| Debian 4.0 | asterisk | 1:1.2.13~dfsg-2etch1 | DSA-1358-1 |
| Debian 3.1 | asterisk | 1:1.0.7.dfsg.1-2sarge5 | DSA-1358-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Asterisk 1.2.15/1.4.0 - Remote Denial of Service EDB-3407 · dos · Mar 4, 2007 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 1
- DSA-1358-1 asterisk Debian Security (DSA / DLA) · Mar 9, 2026
References
- ADV-2007-0830 vdb-entry
- 22838 vdb-entry
- 33888 vdb-entry
- 24578 third-party-advisory
- http://asterisk.org/node/48319
- SUSE-SA:2007:034 vendor-advisory
- http://labs.musecurity.com/advisories/MU-200703-01.txt
- http://asterisk.org/node/48320
- 24380 third-party-advisory
- asterisk-sip-channeldriver-dos(32830) vdb-entry
- GLSA-200703-14 vendor-advisory
- 25582 third-party-advisory
- 1017723 vdb-entry
- VU#228032 third-party-advisory
- DSA-1358 vendor-advisory