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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
3 years ago
Modified
Modified
3 years 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.