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ISC BIND DoS Vulnerability (Aug 2021) - Windows

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

10 months ago

Modified

Modified

10 months 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.