Asterisk Management Interface denial of service
| asterisk-interface-dos (33886) |  Low Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by a Null pointer dereference that can occur with certain configuration settings. If the Management Interface is enabled and a user is configured in the manager.conf file without a password, a remote attacker could exploit this vulnerability to crash the application.
Platforms Affected:
- Debian, Debian Linux 3.1
- Debian, Debian Linux 4.0
- Digium, Asterisk Appliance Developer Kit 0.x.x - 0.4.0
- Digium, Asterisk Business Edition A.x.x
- Digium, Asterisk Business Edition B.x.x
- Digium, Asterisk Open Source 1.0.0
- Digium, Asterisk Open Source 1.2.x
- Digium, Asterisk Open Source 1.4.x
- Digium, AsteriskNOW Beta5 and prior
- Novell, OpenSUSE 10.2
- SuSE, SuSE SLES 9
Remedy:
Refer to ASA-2007-012 for patch, upgrade or suggested workaround information. See References.
For Debian/GNU Linux:
Refer to DSA-1358-1 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- ASA-2007-012, Remote Crash Vulnerability in Manager Interface at http://asterisk.org/node/48352.
- Asterisk Web site, Asterisk- Downloads at http://asterisk.org/downloads.
- Full-Disclosure Mailing List, Tue Apr 24 2007 - 18:24:32 CDT, ASA-2007-012: Remote Crash Vulnerability in Manager Interface at http://archives.neohapsis.com/archives/fulldisclosure/2007-04/0652.html.
- BID-23649: Asterisk ManagerInterface Manager.Conf Remote Denial of Service Vulnerability
- CVE-2007-2294: The Manager Interface in Asterisk before 1.2.18 and 1.4.x before 1.4.3 allows remote attackers to cause a denial of service (crash) by using MD5 authentication to authenticate a user that does not have a password defined in manager.conf, resulting in a NULL pointer dereference.
- DSA-1358: asterisk -- several vulnerabilities
- OSVDB ID: 35369: Asterisk Manager Interface Passwordless User MD5 Authentication DoS
- SA24977: Asterisk T.38 SDP Buffer Overflows and Management Interface Denial of Service
- SECTRACK ID: 1017955: Asterisk Manager Interface NULL Pointer Dereference Lets Remote Users Deny Service
- SUSE-SA:2007:034: Asterisk security update
- VUPEN/ADV-2007-1534: Asterisk Packets Handling Remote Buffer Overflow and Denial of Service Vulnerabilities
Reported:
Apr 25, 2007
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