PowerDNS Recursor 3.x < 3.0.1 EDNS0 DoS

medium Nessus Plugin ID 87948


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


According to its self-reported version number, the version of the PowerDNS Recursor listening on the remote host is version 3.x prior to 3.0.1. It is, therefore, affected by a denial of service vulnerability due to improper processing of Extension Mechanisms for DNS (EDNS0) packets. A remote attacker can exploit this vulnerability, via specially crafted EDNS0 packets, to cause an application crash, resulting in a denial of service condition.

Note that Nessus has not attempted to exploit this issue but has instead relied only on the application's self-reported version number.
Also, Nessus has not checked for the presence of the patch.


Upgrade to PowerDNS Recursor 3.0.1 or later. Alternatively, apply the patch referenced in the vendor advisory.

See Also


Plugin Details

Severity: Medium

ID: 87948

File Name: powerdns_recursor_3_0_1.nasl

Version: 1.3

Type: remote

Family: DNS

Published: 1/15/2016

Updated: 7/25/2018

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Vulnerability Information

CPE: cpe:/a:powerdns:powerdns, cpe:/a:powerdns:recursor

Required KB Items: Settings/ParanoidReport, pdns/version, pdns/version_full, pdns/version_source, pdns/type

Exploit Ease: No known exploits are available

Patch Publication Date: 4/25/2006

Vulnerability Publication Date: 4/25/2006

Reference Information

CVE: CVE-2006-2069

BID: 17711