Vulnerability identifier: #VU66540

Vulnerability risk: Medium

CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:U/RC:C]

CVE-ID: CVE-2022-33993

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Domain Name Relay Daemon
Server applications / DNS servers

Vendor: DNRD

Description

The vulnerability allows a remote attacker to perform DNS cache poisoning attacks.

The vulnerability exists due to insufficient validation of special domain name characters. A remote attacker can send specially crafted input to the server and perform DNS cache poisoning attacks.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Domain Name Relay Daemon: 2.5 - 2.20.3

---

External links
http://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
http://www.openwall.com/lists/oss-security/2022/08/14/1
http://www.usenix.org/conference/usenixsecurity21/presentation/jeitner

---

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.