CVE-2022-30256 Other in n/a

High 7.5 Published 18 Nov 2022 Updated 29 Apr 2025

Attackers can resolve revoked or expired domains due to flawed caching logic, bypassing intended security controls in MaraDNS Deadwood.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-30256?

CVE-2022-30256 is a high-severity vulnerability in n/a, published on 18 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-672

Which versions are affected by CVE-2022-30256?

It affects 1 product.

Products include Maradns Maradns.

How do I fix CVE-2022-30256?

Upgrade to a fixed version.

Is CVE-2022-30256 being exploited?

There is no known exploitation of CVE-2022-30256 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-30256, GHSA-qqpw-wxfv-vfcg, UBUNTU-CVE-2022-30256.