CVE-2024-1248
MediumCVSS 4.8Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
The silent Just-In-Time (JIT) provisioning feature in federated authentication implementations fails to properly segregate user roles during account creation when a federated user shares a username with a local user. This allows the provisioning process to overwrite existing roles of local users with roles assigned to the federated user.
Risk Assessment
The organization risks unauthorized modification of local user roles, potentially leading to privilege escalation or degradation, and consequently compromising system integrity and access to sensitive data.
Recommendation
Disable silent JIT provisioning in the federated identity provider or implement mechanisms to prevent overwriting local user roles, such as enforcing unique usernames across domains.
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Original NVD description (English source)
The silent Just-In-Time (JIT) provisioning feature in federated authentication implementations fails to properly segregate user roles during account creation when a federated user shares a username with a local user. This allows the provisioning process to overwrite existing roles of local users with roles assigned to the federated user. Exploitation requires a federated identity provider (IDP) with silent JIT provisioning enabled and an attacker's knowledge of a local user's username. When these conditions are met, a malicious individual can leverage the JIT provisioning process to modify the roles of local users. The overwritten roles are limited to those defined within the federated IDP, typically granting minimal access rights unless explicitly configured otherwise by the federated IDP administrator.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

