Security restrictions bypass in PowerDNS Recursor

Published: 2020-07-08
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-14196
Exploitation vector Network
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
PowerDNS Recursor
Server applications / DNS servers

Vendor PowerDNS.COM B.V.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper access control

EUVDB-ID: #VU29577

Risk: Medium


CVE-ID: CVE-2020-14196


Exploit availability:


The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to  ACL applied to the internal web server via "webserver-allow-from" is not properly enforced. A remote attacker can send HTTP queries to the internal web server, bypassing the restriction.

Successful exploitation of the vulnerability requires that the the API webserver is enabled (not the default value).


Install updates from vendor's website.

Vulnerable software versions

PowerDNS Recursor: 4.1.0 - 4.3.1

Fixed software versions

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?