ISC BIND 9.x < 9.9.9-P1 / 9.9.9-S3 / 9.10.4-P1 / 9.11.0b1 DoS

medium Nessus Network Monitor Plugin ID 9874

Synopsis

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

Description

Versions of ISC BIND 9.x prior to 9.9.9-P1, 9.9.9-S3, 9.10.4-P1 and 9.11.0b1 are unpatched for a flaw in 'lwresd' that is triggered during the handling of 'getrrsetbyname()' with a non-absolute name, which can cause an infinite recursion. This may allow a remote attacker to cause a denial of service.

Solution

Upgrade ISC BIND to version 9.11.0b1 or later. If version 9.11.x cannot be obtained, versions 9.10.4-P1, 9.9.9-S3 and 9.9.9-P1 are also patched for these issues.

See Also

https://kb.isc.org/article/AA-01398

https://kb.isc.org/article/AA-01393/74/CVE-2016-2775%3A-A-query-name-which-is-too-long-can-cause-a-segmentation-fault-in-lwresd.html

Plugin Details

Severity: Medium

ID: 9874

Family: DNS Servers

Published: 1/20/2017

Updated: 3/6/2019

Nessus ID: 92493

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.4

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

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

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 5.1

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

Temporal Vector: CVSS:3.0/E:X/RL:O/RC:C

Vulnerability Information

CPE: cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*

Patch Publication Date: 7/18/2016

Vulnerability Publication Date: 7/18/2016

Reference Information

CVE: CVE-2016-2775

BID: 92037