What’s Vulnerable › Vulnerabilities

CVE-2022-30256

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-19 · updated 2026-06-17
• Weakness: CWE-672

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.

Affected products

• MaraDNS: before 3.4.03; from 3.5.0 before 3.5.0022 — fixed in 3.4.03, 3.5.0022

How to fix

Upgrade to a fixed version: MaraDNS 3.4.03, 3.5.0022. Check the vendor advisory for mitigations.

References

• https://lists.debian.org/debian-lts-announce/2023/06/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3VSMLJX25MXGQ6A7UPOGK7VPUVDESPHL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NB7LDZM5AGWC5BHHQHW6CP5OFNBBKFOQ/
• https://maradns.samiam.org/
• https://maradns.samiam.org/security.html#CVE-2022-30256
• https://www.debian.org/security/2023/dsa-5441
• https://lists.debian.org/debian-lts-announce/2023/06/msg00019.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3VSMLJX25MXGQ6A7UPOGK7VPUVDESPHL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NB7LDZM5AGWC5BHHQHW6CP5OFNBBKFOQ/
• https://maradns.samiam.org/
• https://maradns.samiam.org/security.html#CVE-2022-30256
• https://www.debian.org/security/2023/dsa-5441

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