Is CVE-2022-30256 in the CISA KEV catalog?

No. CVE-2022-30256 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-30256?

CVE-2022-30256 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-30256?

CVE-2022-30256 has an EPSS score of 0.89% (55th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-30256?

Upgrade maradns on debian 11 to 2.0.13-1.4+deb11u1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2022-30256

HIGH

7.5

CVSS v3

NVD

Description

An issue was discovered in MaraDNS Deadwood through 3.5.0021 that allows variant V1 of unintended domain name resolution. A revoked domain name can still be resolvable for a long time, including expired domains and taken-down malicious domains. The effects of an exploit would be widespread and highly impactful, because the exploitation conforms to de facto DNS specifications and operational practices, and overcomes current mitigation patches for "Ghost" domain names.

CWE-672

How to fix

Remediation Available

maradnsDebian

Fixed in:2.0.13-1.4+deb11u1CVE-2022-30256

duendeUbuntu

Fixed in:2.0.13-1ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.2ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.20.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.22.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.23.04.1USN-6271-1

maradnsUbuntu

Fixed in:2.0.13-1ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.2ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.20.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.22.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.23.04.1USN-6271-1

maradns-deadwoodUbuntu

Fixed in:2.0.13-1ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.2ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.20.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.22.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.23.04.1USN-6271-1

maradns-zoneserverUbuntu

Fixed in:2.0.13-1ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.2ubuntu0.1~esm1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.20.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.22.04.1USN-6271-1

Fixed in:2.0.13-1.4+deb11u1build0.23.04.1USN-6271-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.89%probability of exploitation in 30 days

55thpercentile

Moderate risk: more likely to be exploited than 55% of all known CVEs.

References

Vendor Advisory2

Other references4

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-29.