CVE-2022-33991 json
dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1.
published 2022-08-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-37024
- cvss
- 5.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1. This leads to disabling of DNSSEC protection provided by upstream resolvers.
Exploit prediction
0.99% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- openwall.com https://www.openwall.com/lists/oss-security/2022/08/14/3 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
Classification
- Weakness
-
- CWE-290 Authentication Bypass by Spoofing
References
-
openwall.com
/lists/oss-security/2022/08/14/3
exploit, mailing-list, third-party-advisory
-
sourceforge.net
/projects/dproxy/
third-party-advisory
-
usenix.org
/conference/usenixsecurity22/presentation/jeitner
third-party-advisory
Sources
- CVE List CVE-2022-33991
- NVD CVE-2022-33991
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.