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ISC BIND DoS Vulnerability (Aug 2021) - Linux
Information
Severity
Severity
Medium
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
5.0
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
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 (DoS) vulnerability.
Insight
Insight
named failed to check the opcode of responses when performing zone refreshes, stub zone updates, and UPDATE forwarding. This could lead to an assertion failure under certain conditions and has been addressed by rejecting responses whose opcode does not match the expected value.
Affected Software
Affected Software
BIND version prior to 9.11.35, 9.16.x prior 9.16.20 and 9.17.x prior to 9.17.17.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 9.11.35, 9.16.20, 9.17.17 or later.