CVE-2019-11282 in Cloud Foundry UAA
Summary
by MITRE
Cloud Foundry UAA, versions prior to v74.3.0, contains an endpoint that is vulnerable to SCIM injection attack. A remote authenticated malicious user with scim.invite scope can craft a request with malicious content which can leak information about users of the UAA.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 01/27/2024
The vulnerability identified as CVE-2019-11282 affects Cloud Foundry User Account and Authentication (UAA) service versions prior to v74.3.0, representing a critical security flaw that undermines the integrity of user identity management within cloud environments. This issue manifests through a specific endpoint that fails to properly validate and sanitize input parameters, creating an avenue for attackers to exploit SCIM (System for Cross-domain Identity Management) injection techniques. The vulnerability specifically targets authenticated users who possess the scim.invite scope, which grants them permission to invite new users to the system but should not provide access to sensitive user information disclosure capabilities.
The technical implementation of this vulnerability stems from insufficient input validation within the UAA's SCIM endpoint, which processes user management requests according to SCIM protocol standards. When a malicious actor with appropriate privileges submits crafted requests containing specially formatted data, the system fails to properly filter or sanitize the input before processing it through the underlying user directory service. This allows attackers to inject additional SCIM operations or modify existing queries in ways that bypass normal access controls and authorization checks. The flaw enables unauthorized information leakage about existing users within the UAA system, potentially exposing user account details, permissions, or other sensitive metadata that should remain protected.
From an operational perspective, this vulnerability creates significant risks for organizations relying on Cloud Foundry UAA for identity management, particularly in multi-tenant environments where user isolation is critical for security. The impact extends beyond simple information disclosure, as leaked user information could enable more sophisticated attacks such as credential harvesting, social engineering campaigns, or targeted phishing efforts. Attackers could potentially enumerate valid user accounts, identify privileged users, or gather intelligence about user roles and access patterns that would otherwise remain confidential. The vulnerability particularly affects organizations with large user bases where the exposure of even partial user information could have cascading security implications for the entire platform.
The security implications align with CWE-20, which describes improper input validation, and can be mapped to ATT&CK technique T1087.001 for account discovery, as the vulnerability enables unauthorized enumeration of user accounts. Organizations should prioritize immediate remediation by upgrading to UAA version 74.3.0 or later, which includes proper input sanitization and validation mechanisms. Additional mitigations include implementing stricter access controls for the scim.invite scope, monitoring for unusual SCIM request patterns, and conducting regular security assessments of identity management systems. Network segmentation and privilege separation should also be enforced to limit the potential impact of successful exploitation, while continuous monitoring of authentication logs can help detect anomalous usage patterns that might indicate exploitation attempts.