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Asterisk Multiple DoS Vulnerabilities (AST-2021-008, AST-2021-009)

Information

Severity

Severity

High

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

7.8

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Solution Type

Solution Type

Vendor Patch

Created

Created

1 year ago

Modified

Modified

1 year ago

Summary

Asterisk is prone to multiple denial of service (DoS) vulnerabilities.

Insight

Insight

The following vulnerabilities exist: - CVE-2021-32558: If the IAX2 channel driver receives a packet that contains an unsupported media format it can cause a crash to occur in Asterisk. - CVE-2021-32686: Depending on the timing, it's possible for Asterisk to crash when using a TLS connection if the underlying socket parent/listener gets destroyed during the handshake.

Affected Software

Affected Software

Asterisk Open Source 13.x, 16.x, 17.x, 18.x and 16.x Certified Asterisk.

Detection Method

Detection Method

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

Solution

Solution

Update to version 13.38.3, 16.19.1, 17.9.4, 18.5.1, 16.8-cert10 or later.

Common Vulnerabilities and Exposures (CVE)