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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

1 year ago

Modified

Modified

1 year 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.

Common Vulnerabilities and Exposures (CVE)