CVE-2022-33988

Name: CVE-2022-33988
Creator: NVD / NIST
Published: 2022-08-15T13:15:17.807+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.91%

Last modified Jun 17, 2026

CVE-2022-33988 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. dproxy-nexgen (aka dproxy nexgen) re-uses the DNS transaction id (TXID) value from client queries, which allows attackers (able to send queries to the resolver) to conduct DNS cache-poisoning attacks because the TXID value is known to the attacker.. EPSS estimates a 0.91% chance of exploitation in the next 30 days.

Description

dproxy-nexgen (aka dproxy nexgen) re-uses the DNS transaction id (TXID) value from client queries, which allows attackers (able to send queries to the resolver) to conduct DNS cache-poisoning attacks because the TXID value is known to the attacker.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.91%

55.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Dproxy-Nexgen Project	Dproxy-Nexgen	All versions

References

https://sourceforge.net/projects/dproxy/Product, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/08/14/3Exploit, Mailing List, Third Party Advisory
https://www.usenix.org/conference/usenixsecurity22/presentation/jeitnerThird Party Advisory
https://sourceforge.net/projects/dproxy/Product, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/08/14/3Exploit, Mailing List, Third Party Advisory
https://www.usenix.org/conference/usenixsecurity22/presentation/jeitnerThird Party Advisory

Timeline

Published: Aug 15, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-33988?

How severe is CVE-2022-33988?

CVE-2022-33988 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.91% probability of exploitation in the next 30 days.

How do I fix CVE-2022-33988?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-33988?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST