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Asterisk T.38 DoS Vulnerability (AST-2019-004)
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
4.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:S/C:N/I:N/A:P
Solution Type
Solution Type
Vendor Patch
Created
Created
4 years ago
Modified
Modified
4 years ago
Summary
Asterisk is prone to a denial of service vulnerability when negotiating for T.38 with a declined stream.
Insight
Insight
When Asterisk sends a re-invite initiating T.38 faxing, and the endpoint responds with a declined media stream a crash will then occur in Asterisk.
Affected Software
Affected Software
Asterisk Open Source 15.x and 16.x.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Upgrade to Version 15.7.4, 16.5.1 or later.