ISC BIND 9.x < 9.9.8-S5 / 9.9.9-S3 DoS

medium Nessus Network Monitor Plugin ID 9871


The remote DNS server may be affected by a Denial of Service (DoS) attack vector.


Versions of ISC BIND 9.x prior to 9.9.8-S5 and 9.9.9-S3 are unpatched for a flaw in 'rdataset.c' that is triggered when handling flag values in incoming queries. This may allow a remote attacker to cause a REQUIRE assertion failure leading to termination of the service.


Upgrade ISC BIND to version 9.9.9-S3 or later. If version 9.9.x cannot be obtained, version 9.9.8-S5 is also patched for this vulnerability.

See Also

Plugin Details

Severity: Medium

ID: 9871

Family: DNS Servers

Published: 1/20/2017

Updated: 3/6/2019

Nessus ID: 88716

Risk Information


Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

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

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


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:isc:bind

Patch Publication Date: 2/3/2016

Vulnerability Publication Date: 2/3/2016

Reference Information

CVE: CVE-2016-1284

BID: 82807