Asterisk Skinny channel driver denial of service
| asterisk-skinny-channel-dos (35870) |  Low Risk |
Description:
Asterisk is vulnerable to a denial of service, caused by a vulnerability in the Skinny channel driver. By sending a specially-crafted "CAPABILITIES_RES_MESSAGE" packet with an overly large capabilities count, a remote attacker with an authenticated session could exploit this vulnerability to cause the driver to segfault.
Platforms Affected:
- Digium, Asterisk Appliance 1.0.x - 1.0.3
- Digium, Asterisk Appliance Developer Kit 0.x.x - 0.7.0
- Digium, Asterisk Open Source 1.4.x
- Digium, AsteriskNOW pre-release -beta7
Remedy:
Refer to ASA-2007-019 for patch, upgrade or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- ASA-2007-019, Remote crash vulnerability in Skinny channel driver at http://downloads.digium.com/pub/asa/ASA-2007-019.pdf.
- BID-25228: Asterisk Skinny Channel Driver Remote Denial of Service Vulnerability
- CVE-2007-4280: The Skinny channel driver (chan_skinny) in Asterisk Open Source before 1.4.10, AsteriskNOW before beta7, Appliance Developer Kit before 0.7.0, and Appliance s800i before 1.0.3 allows remote authenticated users to cause a denial of service (application crash) via a CAPABILITIES_RES_MESSAGE packet with a capabilities count larger than the capabilities_res_message array population.
- FrSIRT/ADV-2007-2808: Asterisk Products Skinny Channel Driver Remote Denial of Service Vulnerability
- SA26340: Asterisk Skinny Channel Driver Denial of Service
- SECTRACK ID: 1018536: Asterisk chan_skinny Driver Lets Remote Authenticated Users Deny Service
Reported:
Aug 07, 2007
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