ISC BIND 9.9.6-S2 DNSSEC Validation DoS

medium Nessus Plugin ID 81488
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The remote name server is affected by a denial of service vulnerability.


According to its self-reported version number, the remote installation of BIND (via DNSco) is potentially affected by a denial of service vulnerability due to an error relating to DNSSEC validation and the managed-keys feature. A remote attacker can trigger an incorrect trust-anchor management scenario in which no key is ready for use, resulting in an assertion failure and daemon crash.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Upgrade to BIND version 9.9.6-S3 or later.

Alternatively, as a workaround, do not use 'auto' for the dnssec-validation or dnssec-lookaside options and do not configure a managed-keys statement.

See Also

Plugin Details

Severity: Medium

ID: 81488

File Name: bind9_996_S3_dnsco.nasl

Version: 1.7

Type: remote

Family: DNS

Published: 2/24/2015

Updated: 11/15/2018

Dependencies: bind_version.nasl

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: AV:N/AC:H/Au:N/C:N/I:N/A:C

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:isc:dnsco_bind

Required KB Items: bind/version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2/18/2015

Vulnerability Publication Date: 2/18/2015

Reference Information

CVE: CVE-2015-1349

BID: 72673