Asterisk SIP channel driver dialog history denial of service
| asterisk-sip-dialoghistory-dos (36145) |  Low 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.
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
Remedy:
Refer to AST-2007-020 for patch, upgrade or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- AST-2007-020, Resource Exhaustion vulnerability in SIP channel driver at http://downloads.digium.com/pub/asa/AST-2007-020.html.
- Full-Disclosure Mailing List, Tue Aug 21 2007 - 15:28:41 CDT, AST-2007-020: Resource Exhaustion Vulnerability in Asterisk SIP channel driver at http://archives.neohapsis.com/archives/fulldisclosure/2007-08/0393.html.
- 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
Reported:
Aug 21, 2007
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