Authenticated takeover of transferred domain names
Published Jan 30, 2020 · Updated Aug 4, 2024
Improper authorization in Ethereum Name Service ENS before 0.4.0 allows remote authenticated users to reclaim transferred domain names. The published advisory identifies the ENS registry as the affected locus but does not disclose the specific state mutation or authorization error used to plant the trapdoor. Exploitation requires prior ownership of a name and a later transfer accepted by another user; the former owner can then restore control without that user's consent.
Summary
What happened
Improper authorization in Ethereum Name Service ENS before 0.4.0 allows remote authenticated users to reclaim transferred domain names. The published advisory identifies the ENS registry as the affected locus but does not disclose the specific state mutation or authorization error used to plant the trapdoor. Exploitation requires prior ownership of a name and a later transfer accepted by another user; the former owner can then restore control without that user's consent.
The record
- CVE
- CVE-2020-5232
- Published
- Jan 30, 2020
- Updated
- Aug 4, 2024
- Vendor
- Ethereum Name Service
- Product
- ENS
- Classifications
- CWE-285
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 30, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=< 0.4.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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