Asterisk SIP channel driver dialog history denial of service
| asterisk-sip-dialoghistory-dos (36145) |  Medium Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by the SIP Channel Driver (chan_sip) dialog history recording each history item whether it is enabled or not. By creating a SIP dialog that records an unlimited amount of entries, a remote attacker could exploit this vulnerability to consume all available resources, resulting in a denial of service.
*CVSS:
| Base Score: | 7.1 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 6.4 |
| Exploitability: | Functional |
| Remediation Level: | Unavailable |
| Report Confidence: | Uncorroborated |
Consequences:
Denial of Service
Remedy:
Refer to AST-2007-020 for patch, upgrade or suggested workaround information. See References.
References:
- AST-2007-020: Resource Exhaustion vulnerability in SIP channel driver.
- Full-Disclosure Mailing List, Tue Aug 21 2007 - 15:28:41 CDT: AST-2007-020: Resource Exhaustion Vulnerability in Asterisk SIP channel driver.
- BID-25392: Asterisk SIP Dialog History Resource Exhaustion Remote Denial of Service Vulnerability
- CVE-2007-4455: The SIP channel driver (chan_sip) in Asterisk Open Source 1.4.x before 1.4.11, AsteriskNOW before beta7, Asterisk Appliance Developer Kit 0.x before 0.8.0, and s800i (Asterisk Appliance) 1.x before 1.0.3 allows remote attackers to cause a denial of service (memory exhaustion) via a SIP dialog that causes a large number of history entries to be created.
- SA26553: Asterisk SIP Channel Driver Dialog History Memory Exhaustion
- SECTRACK ID: 1018595: Asterisk SIP Dialog History Processing Error Lets Remote Users Deny Service
- VUPEN/ADV-2007-2953: Asterisk Products SIP Channel Driver Remote Denial of Service Vulnerability
Platforms Affected:
- Digium Asterisk Appliance 1.0.x
- Digium Asterisk Appliance Developer Kit 0.x.x
- Digium Asterisk Open Source 1.4.x prior to1.4.11
- Digium AsteriskNOW pre-release -beta7
Reported:
Aug 21, 2007
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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.