What’s Vulnerable › Vulnerabilities

CVE-2022-33993

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-08-15 · updated 2026-06-17

Description

Misinterpretation of special domain name characters in DNRD (aka Domain Name Relay Daemon) 2.20.3 leads to cache poisoning because domain names and their associated IP addresses are cached in their misinterpreted form.

Affected products

• Domain Name Relay Daemon Project Domain Name Relay Daemon: 2.20.3

References

• http://dnrd.sourceforge.net/
• https://www.openwall.com/lists/oss-security/2022/08/14/1
• https://www.usenix.org/conference/usenixsecurity21/presentation/jeitner
• https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
• http://dnrd.sourceforge.net/
• https://www.openwall.com/lists/oss-security/2022/08/14/1
• https://www.usenix.org/conference/usenixsecurity21/presentation/jeitner
• https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner

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