|Number of vulnerabilities||1|
|Public exploit||Public exploit code for vulnerability #1 is available.|
Server applications / DNS servers
This security bulletin contains one medium risk vulnerability.
Exploit availability: NoDescription
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 - 4.1.16, 4.2.0 - 4.2.2, 4.3.0 - 4.3.1
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.