CVE-2024-5072 in Server
Summary
by MITRE • 05/17/2024
Improper input validation in PAM JIT elevation feature in Devolutions Server 2024.1.11.0 and earlier allows an authenticated user with access to the PAM JIT elevation feature to manipulate the LDAP filter query via a specially crafted request.
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Analysis
by VulDB Data Team • 11/20/2024
The vulnerability identified as CVE-2024-5072 represents a critical security flaw within Devolutions Server's Privileged Access Management Just-In-Time elevation feature. This issue affects versions 2024.1.11.0 and earlier, where improper input validation mechanisms fail to adequately sanitize user-supplied data before processing LDAP filter queries. The flaw exists in the authentication and authorization pathways that govern privileged access control, creating a potential avenue for malicious actors to exploit the system's trust model. The vulnerability specifically targets the JIT elevation functionality, which is designed to provide temporary elevated privileges to users who require them for specific tasks. When an authenticated user gains access to this feature, they can manipulate the LDAP filter parameters through crafted requests that bypass normal validation checks. This type of vulnerability falls under CWE-20, which encompasses improper input validation, and represents a classic example of how insufficient sanitization can lead to unauthorized access and privilege escalation. The attack surface is particularly concerning given that it operates within the privileged access management domain, where successful exploitation could result in significant compromise of sensitive systems and data. The vulnerability demonstrates a fundamental weakness in the server's ability to validate and sanitize inputs that are critical to access control decisions.
The technical implementation of this vulnerability stems from inadequate validation of LDAP filter parameters within the JIT elevation workflow. When a user submits a request through the PAM system, the LDAP filter query is constructed based on user input without proper sanitization or validation of the input characters and structures. This allows an attacker to inject malicious elements into the LDAP filter syntax, potentially manipulating the query to bypass authentication checks or access unauthorized resources. The exploitation occurs at the point where the system processes user-supplied data for LDAP operations, creating a path where crafted input can alter the intended behavior of the access control system. The vulnerability essentially enables a form of LDAP injection where the attacker can manipulate the underlying directory service queries to achieve unauthorized access. This type of attack leverages the trust relationship between the PAM system and the directory service, allowing the malicious actor to exploit the legitimate access pathways to gain elevated privileges or access restricted resources. The attack vector is particularly insidious because it operates within legitimate user sessions, making detection more difficult and potentially allowing for prolonged unauthorized access.
The operational impact of CVE-2024-5072 extends far beyond simple privilege escalation, as it fundamentally undermines the security posture of organizations relying on Devolutions Server for privileged access management. Successful exploitation could enable attackers to gain unauthorized access to critical systems, databases, and network resources that are typically protected by the JIT elevation controls. The vulnerability affects the core principle of least privilege that JIT elevation is designed to enforce, potentially allowing attackers to bypass time-limited access controls and gain persistent access to sensitive environments. Organizations using this software may experience unauthorized data access, system compromise, and potential lateral movement within their networks. The impact is particularly severe in environments where Devolutions Server is used to manage access to critical infrastructure, as the vulnerability could enable attackers to escalate privileges beyond what was intended by the security controls. From an operational standpoint, this vulnerability could result in significant compliance violations, as organizations may fail to meet regulatory requirements for privileged access management. The attack could also lead to extended periods of undetected compromise, as the exploitation occurs within legitimate user sessions and may not trigger standard security alerts. The vulnerability's impact on business continuity is substantial, as it could enable attackers to disrupt critical services or exfiltrate sensitive data.
Organizations should implement immediate mitigations to address CVE-2024-5072, beginning with updating to the latest version of Devolutions Server where the vulnerability has been patched. The patch addresses the improper input validation by implementing proper sanitization and validation of LDAP filter parameters before processing. Security teams should also consider implementing additional monitoring and detection mechanisms to identify potential exploitation attempts, including monitoring for unusual LDAP query patterns or unauthorized access attempts to privileged resources. Network segmentation and access controls should be reviewed to limit the potential impact of successful exploitation, particularly around critical systems that may be accessible through the compromised JIT elevation feature. The implementation of principle of least privilege should be reinforced, ensuring that users have access only to the resources necessary for their specific roles. Organizations should also conduct thorough vulnerability assessments to identify any other systems that may be vulnerable to similar LDAP injection attacks, as this represents a broader class of vulnerability that could affect other directory service integrations. Security controls should include regular audits of access logs to detect anomalous behavior patterns that might indicate exploitation attempts. The vulnerability highlights the importance of proper input validation in security-critical components and underscores the need for comprehensive security testing of privileged access management systems. Organizations should also consider implementing additional security controls such as multi-factor authentication for JIT elevation requests and enhanced logging of all access control decisions to provide better visibility into potential exploitation attempts.