漏洞信息
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漏洞标题
Org.keycloak.protocol.oidc: keycloak refresh token reuse bypass via toctou race condition
漏洞描述信息
A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined.
CVSS信息
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
漏洞类别
检查时间与使用时间(TOCTOU)的竞争条件