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Asterisk Multiple DoS Vulnerabilities (AST-2020-003, AST-2020-004)

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 multiple denial of service vulnerabilities.

Insight

Insight

Multiple flaws exist in the res_pjsip_diversion module: - A crash can occur when a SIP message is received that has a History-Info header, which contains a tel-uri. - A crash can occur when a SIP 181 response is received that has a Diversion header, which contains a tel-uri.

Affected Software

Affected Software

Asterisk Open Source 13.38.0, 16.15.0, 17.9.0 and 18.1.0.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Upgrade to Version 13.38.1, 16.15.1, 17.9.1, 18.1.1 or later.