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GHSA-9g98-5mj6-f9mv: Keycloak vulnerable to user impersonation via stolen UUID code

Keycloak’s OpenID Connect user authentication was found to incorrectly authenticate requests. An authenticated attacker who could also obtain a certain piece of info from a user request, from a victim within the same realm, could use that data to impersonate the victim and generate new session tokens.

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  1. GitHub Advisory Database
  2. GitHub Reviewed
  3. CVE-2023-0264

Keycloak vulnerable to user impersonation via stolen UUID code

High severity GitHub Reviewed Published Mar 2, 2023 in keycloak/keycloak

Package

maven org.keycloak:keycloak-services (Maven)

Affected versions

< 21.0.1

Description

Keycloak’s OpenID Connect user authentication was found to incorrectly authenticate requests. An authenticated attacker who could also obtain a certain piece of info from a user request, from a victim within the same realm, could use that data to impersonate the victim and generate new session tokens.

References

  • GHSA-9g98-5mj6-f9mv
  • keycloak/keycloak@ec81091

Published to the GitHub Advisory Database

Mar 2, 2023

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CVE-2023-0264: cve-details

A flaw was found in Keycloaks OpenID Connect user authentication, which may incorrectly authenticate requests. An authenticated attacker who could obtain information from a user request within the same realm could use that data to impersonate the victim and generate new session tokens. This issue could impact confidentiality, integrity, and availability.

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