How severe is CVE-2023-28451?

CVE-2023-28451 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-28451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-28451?

CVE-2023-28451 affects Technitium Dnsserver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-28451?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2023-28451 have an EU (EUVD) identifier?

Yes. CVE-2023-28451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-32133.

When was CVE-2023-28451 published?

CVE-2023-28451 was published on 2024-09-18 and last updated on 2026-06-17.

CVE-2023-28451

CVE-2023-28451 is a high-severity vulnerability in Technitium Dnsserver with a CVSS 3.x base score of 7.5. 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-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (41st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-32133
Weakness: CWE-400
Affected product: Technitium Dnsserver
Published: 2024-09-18
Last modified: 2026-06-17

Description

An issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing DoS (denial of service) for normal resolution. The effects of an exploit would be widespread and highly impactful, because the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.

Frequently asked questions

What is CVE-2023-28451?: An issue was discovered in Technitium 11.0.2. There is a vulnerability (called BadDNS) in DNS resolving software, which triggers a resolver to ignore valid responses, thus causing DoS (denial of service) for normal resolution. The effects of an exploit would be widespread and highly impactful, because the attacker could just forge a response targeting the source port of a vulnerable resolver without the need to guess the correct TXID.
How severe is CVE-2023-28451?: CVE-2023-28451 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-28451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-28451?: CVE-2023-28451 affects Technitium Dnsserver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-28451?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2023-28451 have an EU (EUVD) identifier?: Yes. CVE-2023-28451 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-32133.
When was CVE-2023-28451 published?: CVE-2023-28451 was published on 2024-09-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:technitium:dnsserver:11.0.2:*:*:*:*:*:*:*

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