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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

2 years ago

Modified

Modified

2 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.

Common Vulnerabilities and Exposures (CVE)