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Asterisk T.38 Negotiation Remote Denial Of Service Vulnerability
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
12 years ago
Modified
Modified
3 years ago
Summary
This host is running Asterisk and is prone to Denial of Service vulnerability.
Insight
Insight
The flaw is caused by an error when handling 'T.38 negotiations' over SIP with a negative or overly large value in the 'FaxMaxDatagram' field, or without any 'FaxMaxDatagram' field, which could allows attackers to crash a server.
Affected Software
Affected Software
Asterisk version 1.6.0.x before 1.6.0.22, 1.6.1.x before 1.6.1.14, and 1.6.2.x before 1.6.2.2
Solution
Solution
Upgrade to version 1.6.0.22, 1.6.1.14, 1.6.2.2 or apply the patch from the linked references
Common Vulnerabilities and Exposures (CVE)
References
- http://secunia.com/advisories/38395
- http://www.vupen.com/english/advisories/2010/0289
- http://securitytracker.com/alerts/2010/Feb/1023532.html
- http://downloads.asterisk.org/pub/security/AST-2010-001.html
- http://www.asterisk.org/downloads
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.0.diff
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.1.diff
- http://downloads.asterisk.org/pub/security/AST-2010-001-1.6.2.diff