PowerDNS Authoritative Server 3.x < 3.4.5 Label Decompression Self-Referential Name Handling DoS

high Nessus Plugin ID 87946


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


According to its self-reported version number, the version of the PowerDNS Authoritative Server listening on the remote host is version 3.x prior to 3.4.5. 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, via specially 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 Authoritative Server 3.4.5 or later.
Alternatively, apply the patch referenced in the vendor advisory.

See Also


Plugin Details

Severity: High

ID: 87946

File Name: powerdns_authoritative_3_4_5.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:authoritative

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

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