PowerDNS Recursor 3.x < 3.7.3 Label Decompression DoS

high Nessus Plugin ID 87952


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 3.7.3. It is, therefore, affected by a denial of service vulnerability due to improper validation of user-supplied input when handling self-referential names during label decompression. An unauthenticated, remote attacker can exploit this vulnerability, via crafted query packets, to crash the server.

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 3.7.3 or later. Alternatively, apply the patch referenced in the vendor advisory.

See Also


Plugin Details

Severity: High

ID: 87952

File Name: powerdns_recursor_3_7_3.nasl

Version: 1.4

Type: remote

Family: DNS

Published: 1/15/2016

Updated: 7/26/2018

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

Vulnerability Information

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

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/9/2015

Vulnerability Publication Date: 4/23/2015

Reference Information

CVE: CVE-2015-1868, CVE-2015-5470

BID: 74306