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Keycloak: Impersonation and lockout possible through incorrect handling of email trust

Moderate severity GitHub Reviewed Published Jul 18, 2023 in keycloak/keycloak • Updated Jul 18, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

< 22.0.1

Patched versions

22.0.1

Description

Impersonation and lockout are possible due to email trust not being handled correctly in Keycloak. Since the verified state is not reset when the email changes, it is possible for users to shadow others with the same email and lock out or impersonate them.

References

@stianst stianst published to keycloak/keycloak Jul 18, 2023
Published to the GitHub Advisory Database Jul 18, 2023
Reviewed Jul 18, 2023
Last updated Jul 18, 2023

Severity

Moderate

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
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

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:N/UI:N/S:U/C:N/I:L/A:L

EPSS score

0.079%
(36th percentile)

Weaknesses

CVE ID

CVE-2023-0105

GHSA ID

GHSA-c7xw-p58w-h6fj

Source code

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