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.
*CVSS:
| Base Score: | 2.8 |
| Access Vector: | Remote |
| Access Complexity: | High |
| Authentication: | Not Required |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 2.1 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
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.
References:
- ASA-2007-012: Remote Crash Vulnerability in Manager Interface.
- Asterisk Web site: Asterisk- Downloads.
- Full-Disclosure Mailing List, Tue Apr 24 2007 - 18:24:32 CDT: ASA-2007-012: Remote Crash Vulnerability in Manager Interface.
- 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
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
Reported:
Apr 25, 2007
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.