#VU9438 Improper access control in PowerDNS Authoritative - CVE-2017-15091

Vulnerability identifier: #VU9438

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15091

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PowerDNS Authoritative
Server applications / DNS servers

Vendor: PowerDNS.COM B.V.

Description
The vulnerability allows a remote attacker to modify arbitrary data on the target system.

The weakness exists due to insufficient validation of the API component of PowerDNS Authoritative. A remote attacker with valid API credentials can configure the API as read-only via the api-readonly keyword, flush the cache, trigger a zone transfer or send a NOTIFY.

Mitigation
Update PowerDNS Authoritative to version 4.0.5.

Vulnerable software versions

PowerDNS Authoritative: 3.4.11, 4.0.0 - 4.0.4

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External links
https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2017-04.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.