CyberRota Analysis
AI-GeneratedThe vulnerability arises from improper case sensitivity handling in the authorization checks of the Identity Zone Endpoint in Cloud Foundry UAA, allowing authenticated attackers with zones.write authority to bypass restrictions and access the privileged system identity zone. By exploiting this flaw, attackers can overwrite the system zone's JWT signing key, enabling them to forge JWTs with elevated privileges and potentially compromise any Cloud Foundry deployment that relies on UAA. Organizations using UAA with a MySQL backend configured with the default collation should prioritize immediate remediation to mitigate the risk of unauthorized access and system compromise.
Original NVD Description
Improper handling of case sensitivity (CWE-178) in the identity zone authorization check in the Identity Zone Endpoint in Cloud Foundry UAA allows a remote authenticated attacker holding only the zones.write authority to bypass the intended restriction that this authority does not grant access to the privileged uaa (system) identity zone, by referring to the zone identifier in a non-lowercase form (e.g. UAA) in the request path and body. The authorization layer performs a case-sensitive comparison against the system zone identifier, while the underlying MySQL persistence layer resolves identifiers case-insensitively under its default collation, so the request is authorized incorrectly and is then resolved against the real system zone record. This allows the attacker to overwrite the system zone's JWT signing key with attacker-controlled key material, forge JWTs claiming the admin client and administrator scopes, and fully compromise UAA and any Cloud Foundry deployment that trusts it. This issue only affects UAA deployments backed by MySQL using its default collation; PostgreSQL and HSQLDB backends are not affected.