Unbound < 1.4.14 / 1.4.13p2 Multiple DoS

medium Nessus Plugin ID 57574
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Synopsis

The remote name server is affected by multiple denial of service vulnerabilities.

Description

According to its self-reported version number, the remote Unbound DNS resolver is affected by multiple denial of service vulnerabilities :

- A denial of service vulnerability exists due to an attempt to free unallocated memory during the processing of duplicate CNAME records in a signed zone. An attacker can exploit this, via a specially crafted response, to cause a daemon crash, resulting in a denial of service condition. (CVE-2011-4528)

- A denial of service vulnerability exists due to improper proof processing for NSEC3-signed zones. An attacker can exploit this, via a malformed response that lacks expected NSEC3 records, to cause a daemon crash, resulting in a denial of service condition.
(CVE-2011-4869)

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

Solution

Upgrade to Unbound version 1.4.14 / 1.4.13p2 or later.

See Also

https://nlnetlabs.nl/downloads/unbound/CVE-2011-4528.txt

http://www.nessus.org/u?47029a7d

Plugin Details

Severity: Medium

ID: 57574

File Name: unbound_1_4_14.nasl

Version: 1.7

Type: remote

Family: DNS

Published: 1/17/2012

Updated: 11/15/2018

Dependencies: unbound_version.nasl

Configuration: Enable paranoid mode

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

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

Vulnerability Information

CPE: cpe:/a:unbound:unbound

Required KB Items: unbound/version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 12/19/2011

Vulnerability Publication Date: 12/19/2011

Reference Information

CVE: CVE-2011-4528, CVE-2011-4869

BID: 51115

CERT: 209659