CVE-2012-5484 in FreeIPA
Summary
by MITRE
The client in FreeIPA 2.x and 3.x before 3.1.2 does not properly obtain the Certification Authority (CA) certificate from the server, which allows man-in-the-middle attackers to spoof a join procedure via a crafted certificate.
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Analysis
by VulDB Data Team • 12/29/2024
The vulnerability identified as CVE-2012-5484 affects FreeIPA versions 2.x and 3.x prior to 3.1.2, specifically targeting the client-side certificate validation mechanism during the domain join process. This flaw represents a critical weakness in the authentication and trust establishment procedures that FreeIPA employs to secure communication between client systems and the Certificate Authority infrastructure. The issue manifests when the client fails to properly validate the Certification Authority certificate presented by the server, creating an opportunity for malicious actors to intercept and manipulate the join procedure through fraudulent certificate presentation.
The technical root cause of this vulnerability lies in inadequate certificate validation logic within the FreeIPA client implementation. When a client attempts to join a FreeIPA domain, it must establish trust with the Certificate Authority by validating the CA certificate presented by the server. The flaw occurs because the client does not properly verify the certificate chain or perform sufficient cryptographic validation checks. This allows an attacker positioned in the network path between the client and server to present a forged certificate that appears legitimate to the client, thereby bypassing the normal security controls designed to prevent unauthorized access to the domain.
From an operational perspective, this vulnerability creates a significant attack surface that enables man-in-the-middle attacks during domain join operations. An attacker with network access and the ability to intercept communications can exploit this weakness to impersonate the Certificate Authority, potentially gaining unauthorized access to the domain or redirecting client communications to malicious endpoints. The impact extends beyond simple authentication bypass, as successful exploitation could lead to full domain compromise, allowing attackers to establish persistent access and potentially escalate privileges within the environment. This vulnerability particularly affects organizations relying on FreeIPA for identity management and authentication services, where domain join procedures are frequently executed during system deployment or maintenance activities.
The vulnerability aligns with CWE-295, which addresses improper certificate validation, and maps to ATT&CK technique T1552.001 for credentials from password storage, as it enables attackers to bypass authentication mechanisms and potentially gain access to domain resources. Organizations should implement immediate mitigations including upgrading to FreeIPA 3.1.2 or later versions that contain the necessary certificate validation fixes. Network segmentation and monitoring should be enhanced to detect unusual join procedures or certificate-related anomalies. Additionally, implementing proper certificate pinning mechanisms and ensuring all client systems maintain up-to-date security patches will help prevent exploitation of this vulnerability. Security teams should also conduct thorough audits of their FreeIPA deployments to identify and remediate any instances where older versions remain in use, particularly focusing on systems that frequently perform domain join operations or have elevated network access privileges.