Asterisk null pointer dereference remote pre-authentication DoS vulnerability

Overview

Asterisk contains a null pointer dereference vulnerability that may allow a remote, unauthenticated attacker to cause a denial-of-service condition on a vulnerable system.

Description

Asterisk is a popular PBX application with VoIP support. Asterisk contains a null pointer dereference vulnerability that can allow a remote, unauthenticated attacker to crash the Asterisk server software with a specially crafted Session Initiation Protocol (SIP) packet (typically udp/5060).

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Impact

A remote, unauthenticated attacker may be able to cause a denial of service on a vulnerable server.

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Solution

Apply an update

This issue is addressed in Asterisk versions 1.4.1 and 1.2.16.

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Vendor Information

228032

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Asterisk __ Affected

Updated: March 05, 2007

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

This issue is addressed in Asterisk versions 1.4.1 and 1.2.16.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23228032 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://asterisk.org/node/48320&gt;
• <http://asterisk.org/node/48319&gt;
• <http://secunia.com/advisories/24380/&gt;
• <http://labs.musecurity.com/advisories/MU-200703-01.txt&gt;
• <http://secunia.com/advisories/24427/&gt;
• <http://securitytracker.com/id?1017723&gt;
• <http://www.securityfocus.com/bid/22838&gt;

Acknowledgements

This vulnerability was reported by the Mu Security research team.

This document was written by Will Dormann.

Other Information

CVE IDs:	CVE-2007-1306
Severity Metric:	7.85 Date Public: