Revoked-domain resolution via cache-expiration bypass
Published Nov 18, 2022 · Updated Apr 29, 2025
Improper cache expiration in MaraDNS Deadwood 3.5.0021 and earlier allows remote attackers to prolong resolution of revoked domains. The recursive resolver allows the Ghost-domain query pattern to retain DNS records beyond max_ttl rather than enforcing its configured cache lifetime. The attacker must be allowed to query a recursive Deadwood instance; the bounded consequence is continued resolution of expired or taken-down domains.
Summary
What happened
Improper cache expiration in MaraDNS Deadwood 3.5.0021 and earlier allows remote attackers to prolong resolution of revoked domains. The recursive resolver allows the Ghost-domain query pattern to retain DNS records beyond max_ttl rather than enforcing its configured cache lifetime. The attacker must be allowed to query a recursive Deadwood instance; the bounded consequence is continued resolution of expired or taken-down domains.
The record
- CVE
- CVE-2022-30256
- Published
- Nov 18, 2022
- Updated
- Apr 29, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-672
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 18, 2022CVE publishedPublication date reported by the CVE source.
- Apr 29, 2025Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
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Attacks
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Public exploit references
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Technologies
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