#VU9437 Man-in-the-middle attack in PowerDNS Recursor - CVE-2017-15090

Vulnerability identifier: #VU9437

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-15090

CWE-ID: CWE-300

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PowerDNS Recursor
Server applications / DNS servers

Vendor: PowerDNS.COM B.V.

Description
The vulnerability allows a remote attacker to conduct man-in-the-middle attack.

The weakness exists due to improper validation of DNSSEC component of PowerDNS Recursor. A remote attacker can use man-in-the-middle technique, issue a valid signature for the crafted records and alter the content of records.

Mitigation
Update PowerDNS Recursor to version 4.0.7.

Vulnerable software versions

PowerDNS Recursor: 4.0.0 - 4.0.6

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External links
https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-03.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.