What’s Vulnerable › Vulnerabilities

CVE-2022-33989

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-08-15 · updated 2026-06-17
• Weakness: CWE-331

Description

dproxy-nexgen (aka dproxy nexgen) uses a static UDP source port (selected randomly only at boot time) in upstream queries sent to DNS resolvers. This allows DNS cache poisoning because there is not enough entropy to prevent traffic injection attacks.

Affected products

• Dproxy-Nexgen Project Dproxy-Nexgen: all versions

References

• https://sourceforge.net/projects/dproxy/
• https://www.openwall.com/lists/oss-security/2022/08/14/3
• https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner
• https://sourceforge.net/projects/dproxy/
• https://www.openwall.com/lists/oss-security/2022/08/14/3
• https://www.usenix.org/conference/usenixsecurity22/presentation/jeitner

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