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ISC BIND DoS Vulnerability - CVE-2020-8621 (Windows)

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

ISC BIND is prone to a denial of service vulnerability.

Insight

Insight

While query forwarding and QNAME minimization are mutually incompatible, BIND did sometimes allow QNAME minimization when continuing with recursion after 'forward first' did not result in an answer. In these cases the data used by QNAME minimization might be inconsistent, leading to an assertion failure causing the server to exit.

Affected Software

Affected Software

BIND 9.14.0 - 9.16.5 and 9.17.0 - 9.17.3.

Detection Method

Detection Method

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

Solution

Solution

Update to version 9.16.6, 9.17.4 or later.

Common Vulnerabilities and Exposures (CVE)