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Malicious takeover of previously owned ENS names

High severity GitHub Reviewed Published Jan 30, 2020 in ensdomains/ens • Updated Jan 29, 2023

Package

npm @ensdomains/ens (npm)

Affected versions

< 0.4.0

Patched versions

0.4.0

Description

Impact

A user who owns an ENS domain can set a "trapdoor", allowing them to transfer ownership to another user, and later regain ownership without the new owner's consent or awareness.

Patches

A new ENS deployment is being rolled out that fixes this vulnerability in the ENS registry. The registry is newly deployed at 0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e.

Workarounds

Do not accept transfers of ENS domains from other users on the old registrar.

References

@decanus decanus published to ensdomains/ens Jan 30, 2020
Reviewed Jan 30, 2020
Published to the GitHub Advisory Database Jan 30, 2020
Published by the National Vulnerability Database Jan 31, 2020
Last updated Jan 29, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N

EPSS score

0.063%
(29th percentile)

Weaknesses

CVE ID

CVE-2020-5232

GHSA ID

GHSA-8f9f-pc5v-9r5h

Source code

No known source code
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