ISC BIND 9.7.0.x < 9.9.6-P2 DNSSEC Validation DoS

Medium Nessus Plugin ID 81489

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VPR Score: 3.6

Synopsis

The remote name server is affected by a denial of service vulnerability.

Description

According to its self-reported version number, the remote installation of BIND 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.

Solution

Upgrade to BIND version 9.9.6-P2 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

https://kb.isc.org/article/AA-01245/0/BIND-9.9.6-P2-Release-Notes.html

https://kb.isc.org/docs/aa-01235

Plugin Details

Severity: Medium

ID: 81489

File Name: bind9_996_p2.nasl

Version: 1.7

Type: remote

Family: DNS

Published: 2015/02/24

Updated: 2018/11/15

Dependencies: 10028

Configuration: Enable paranoid mode

Risk Information

Risk Factor: Medium

VPR Score: 3.6

CVSS v2.0

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Required KB Items: bind/version, Settings/ParanoidReport

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/02/18

Vulnerability Publication Date: 2015/02/18

Reference Information

CVE: CVE-2015-1349

BID: 72673