Multiple vulnerabilities in Domain Name Relay Daemon (dnrd)

Published: 2022-08-16

Risk	Medium
Patch available	NO
Number of vulnerabilities	2
CVE-ID	CVE-2022-33993 CVE-2022-33992
CWE-ID	CWE-20 CWE-16
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Domain Name Relay Daemon Server applications / DNS servers
Vendor	DNRD

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU66540

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 - Improper input validation

Exploit availability: No

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.

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.

2) Insecure configuration

EUVDB-ID: #VU66541