Free and open-source vulnerability scanner
Mageni eases for you the vulnerability scanning, assessment, and management process. It is free and open-source.
Install NowAvailable for macOS, Windows, and Linux
Asterisk DoS Vulnerability (AST-2021-002)
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
6.8
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:S/C:N/I:N/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
2 years ago
Modified
Modified
2 years ago
Summary
Asterisk is prone to a denial of service vulnerability when negotiating T.38.
Insight
Insight
When re-negotiating for T.38 if the initial remote response was delayed just enough Asterisk would send both audio and T.38 in the SDP. If this happened, and the remote responded with a declined T.38 stream then Asterisk would crash.
Affected Software
Affected Software
Asterisk Open Source 16.15.0 - 16.16.0, 17.9.0 - 17.9.1, 18.1.0 - 18.2.0 and 16.8-cert4 - 16.8-cert5.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 16.16.1, 17.9.2, 18.2.1, 16.8-cert6 or later.