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Asterisk DoS Vulnerability (AST-2021-003)
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
3 years ago
Modified
Modified
3 years ago
Summary
Asterisk is prone to a denial of service vulnerability where remote attackers could prematurely tear down SRTP calls.
Insight
Insight
An unauthenticated remote attacker could replay SRTP packets which could cause an Asterisk instance configured without strict RTP validation to tear down calls prematurely.
Affected Software
Affected Software
Asterisk Open Source 13.38.1, 16.16.0, 17.9.1, 18.2.0 and 16.8-cert5.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 13.38.2, 16.16.1, 17.9.2, 18.2.1, 16.8-cert6 or later.