Vulnerability identifier: #VU28142
Vulnerability risk: Medium
Exploitation vector: Network
Exploit availability: No
Vendor: PowerDNS.COM B.V.
The vulnerability allows a remote attacker to perform a spoofing attack.
The vulnerability exists due to records in the answer section of a NXDOMAIN response lacking an SOA are not properly validated in SyncRes::processAnswer. A remote attacker with ability to perform a Man-in-the-Middle (MitM) attack can send a NXDOMAIN answer for a name that does exist and bypass DNSSEC validation.
Successful exploitation of the vulnerability may allow an attacker to perform a spoofing attack.
Install updates from vendor's website.
Vulnerable software versions
PowerDNS Recursor: 4.3.0 - 4.3.0 rc2, 4.2.0 - 4.2.1, 4.1.0 - 4.1.15
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.