CVE-2022-30256: An issue was discovered in MaraDNS Deadwood through 3.5.0021 that allows variant V1 of unintended domain name

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HIGH 7.5REMOTEUPGRADE

CVE-2022-30256 is a high-severity flaw (CVSS 7.5) affecting maradns. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-672
Published	2022-11-19
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: maradns

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-19 00:15 UTCPublished CVE record published
2026-06-17 04:43 UTCUpdated Record last modified

maradns maradns UPGRADE

Affected: < 3.4.03 · >= 3.5.0 and < 3.5.0022

Fixed in: 3.4.03, 3.5.0022

Safe to downgrade to: a release before 3.5.0

1. Check installed version

apt-cache policy maradns || rpm -q maradns || maradns --version

2. UPGRADE to 3.4.03 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade maradns

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade maradns

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 3.5.0 (Debian / Ubuntu)

apt-cache madison maradns sudo apt install maradns=<VERSION_BEFORE_3.5.0> sudo apt-mark hold maradns

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list maradns sudo dnf downgrade maradns-<VERSION_BEFORE_3.5.0> sudo dnf versionlock add maradns

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-30256?

maradns: upgrade to 3.4.03, 3.5.0022. Exact commands for each OS are on this page.

Is CVE-2022-30256 being exploited?

CVE-2022-30256 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-30256 affect?

CVE-2022-30256 affects maradns. Severity is high (CVSS 7.5). 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 doma

How urgent is CVE-2022-30256?

Priority 47/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-31137 HIGH 7.5 UPGRADE MITIGATE MaraDNS is open-source software that implements the Domain Name System (DNS)

References

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