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ISC BIND Security Bypass Vulnerability (Remote)

Information

Severity

Severity

Medium

Family

Family

General

CVSSv2 Base

CVSSv2 Base

4.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:P/A:N

Solution Type

Solution Type

Vendor Patch

Created

Created

6 years ago

Modified

Modified

5 years ago

Summary

A flaw was found in the way BIND handled TSIG authentication for dynamic updates. A remote attacker able to communicate with an authoritative BIND server could use this flaw to manipulate the contents of a zone, by forging a valid TSIG or SIG(0) signature for a dynamic update request.

Affected Software

Affected Software

ISC BIND versions 9.4.0-9.8.8, 9.9.0-9.9.10-P1, 9.10.0-9.10.5-P1, 9.11.0-9.11.1-P1, 9.9.3-S1-9.9.10-S2 and 9.10.5-S1-9.10.5-S2

Detection Method

Detection Method

Sends a crafted update request for the TSIG key 'local-ddns' and checks if the response returns a signed MAC.

Solution

Solution

Update to version 9.9.10-P2, 9.10.5-P2, 9.11.1-P2, 9.9.10-S3, 9.10.5-S3 or later.

Common Vulnerabilities and Exposures (CVE)