Keycloak vulnerable to Plaintext Storage of User Password

高 8.8CVE-2023-4918 · GHSA-5q66-v53q-pm35 · 12/09/2023 公開 · 17/06/2026 更新

要点

CVE-2023-4918 は org.keycloak:keycloak-core, keycloak (redhat) に影響する深刻度「高」 (CVSS 8.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.57%（全脆弱性の 47.4% より高い）。
対処：22.0.3 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
org.keycloak:keycloak-core Maven	`≥ 22.0.2, < 22.0.3`	`22.0.3`
keycloak redhat	`= 22.0.2`	修正版なし

概要

A flaw was discovered in Keycloak Core package. When a user registers itself through registration flow, the "password" and "password-confirm" field from the form will occur as regular attributes in the users attributes. The password is also created, but the user attributes must not be there. This way, any entities (all users and clients with proper rights/roles) are able to retrieve the users passwords in clear-text.

Impact

Passwords for self-registered users are stored as cleartext attributes associated with the user.

Mitigation

Disable self-registration for users in all realms until patched.

NVD の説明

A flaw was found in the Keycloak package, more specifically org.keycloak.userprofile. When a user registers itself through registration flow, the "password" and "password-confirm" field from the form will occur as regular user attributes. All users and clients with proper rights and roles are able to read users attributes, allowing a malicious user with minimal access to retrieve the users passwords in clear text, jeopardizing their environment.