How severe is CVE-2022-33989?

CVE-2022-33989 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.

Is CVE-2022-33989 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-33989?

CVE-2022-33989 affects Dproxy-nexgen Project Dproxy-nexgen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-33989?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-33989 published?

CVE-2022-33989 was published on 2022-08-15 and last updated on 2026-06-17.

CVE-2022-33989

CVE-2022-33989 is a medium-severity vulnerability in Dproxy-nexgen Project Dproxy-nexgen with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-331.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-331
Affected product: Dproxy-nexgen Project Dproxy-nexgen
Published: 2022-08-15
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-33989?: 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.
How severe is CVE-2022-33989?: CVE-2022-33989 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
Is CVE-2022-33989 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-33989?: CVE-2022-33989 affects Dproxy-nexgen Project Dproxy-nexgen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-33989?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-33989 published?: CVE-2022-33989 was published on 2022-08-15 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dproxy-nexgen_project:dproxy-nexgen:-:*:*:*:*:*:*:*

More vulnerabilities in Dproxy-nexgen Project Dproxy-nexgen

CVE-2022-33990 — High (CVSS 7.5): Misinterpretation of special domain name characters in dproxy-nexgen (aka dproxy nexgen) leads to cache poisoning…
CVE-2022-33988 — High (CVSS 7.5): dproxy-nexgen (aka dproxy nexgen) re-uses the DNS transaction id (TXID) value from client queries, which allows…
CVE-2022-33991 — Medium (CVSS 5.3): dproxy-nexgen (aka dproxy nexgen) forwards and caches DNS queries with the CD (aka checking disabled) bit set to 1.…

All CVEs affecting Dproxy-nexgen Project Dproxy-nexgen →

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CVE-2024-47945 — Critical (CVSS 9.8): The devices are vulnerable to session hijacking due to insufficient entropy in its session ID generation algorithm.…
CVE-2024-25730 — Critical (CVSS 9.8): Hitron CODA-4582 and CODA-4589 devices have default PSKs that are generated from 5-digit hex values concatenated with a…
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CVE-2022-34294 — Critical (CVSS 9.8): totd 1.5.3 uses a fixed UDP source port in upstream queries sent to DNS resolvers. This allows DNS cache poisoning…

Browse all CWE-331 vulnerabilities →