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.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 11 | maradns | 2.0.13-1.4+deb11u1 | DSA-5441-1 |
| Debian 10 | maradns | 2.0.13-1.2+deb10u1 | DLA-3457-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | maradns | 2.0.13-1.4+deb11u1build0.22.04.1 | USN-6271-1 |
| Ubuntu 20.04 LTS | maradns | 2.0.13-1.4+deb11u1build0.20.04.1 | USN-6271-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | maradns | 2.0.13-1.2ubuntu0.1~esm1 | USN-6271-1 |
| Ubuntu Pro 16.04 LTS | maradns | 2.0.13-1ubuntu0.1~esm1 | USN-6271-1 |
Advisories 3
- USN-6271-1 maradns vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-5441-1 maradns - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3457-1 maradns - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://maradns.samiam.org/
- https://maradns.samiam.org/security.html#CVE-2022-30256
- FEDORA-2023-0c012f6245 vendor-advisory
- FEDORA-2023-cdce244fb8 vendor-advisory
- [debian-lts-announce] 20230619 [SECURITY] [DLA 3457-1] maradns security update mailing-list
- DSA-5441 vendor-advisory