#VU66541 Insecure configuration in Domain Name Relay Daemon - CVE-2022-33992

Vulnerability identifier: #VU66541

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2022-33992

CWE-ID: CWE-16

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
Domain Name Relay Daemon

Software vendor:
DNRD

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to DNRD forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1, which in turn disables DNSSEC protection provided by upstream resolvers and allows to perform DNS cache poisoning.

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

• https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
• https://www.openwall.com/lists/oss-security/2022/08/14/1