Vulnerability Details

ISC BIND DoS Vulnerability (CVE-2017-3140) - Linux

Published: 2021-09-06 08:41:05
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:



severity_date=2019-10-09 23:27:00 +0000 (Wed, 09 Oct 2019)

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

ISC BIND is prone to a denial of service (DoS) vulnerability.

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

Technical Details:
If named is configured to use Response Policy Zones (RPZ), an error processing some rule types can lead to a condition where BIND will endlessly loop while handling a query.

A server is potentially vulnerable to degradation of service if: - the server is configured to use RPZ, - the server uses NSDNAME or NSIP policy rules, and - an attacker can cause the server to process a specific query. Successful exploitation of this condition will cause named to enter a state where it continues to loop while processing the query without ever reaching an end state. While in this state, named repeatedly queries the same sets of authoritative nameservers, and this behavior will usually persist indefinitely beyond the normal client query processing timeout. By triggering this condition multiple times, an attacker could cause a deliberate and substantial degradation in service.

Affected Versions:
BIND 9.9.10, 9.10.5, 9.11.0 through 9.11.1, 9.9.10-S1 and 9.10.5-S1.

Update to version 9.9.10-P1, 9.10.5-P1, 9.11.1-P1, 9.9.10-S2, 9.10.5-S2 or later.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)


CVSS Score
Denial of Service

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