CVE-2022-22187 in Identity Management Service
Summary
by MITRE • 04/14/2022
An Improper Privilege Management vulnerability in the Windows Installer framework used in the Juniper Networks Juniper Identity Management Service (JIMS) allows an unprivileged user to trigger a repair operation. Running a repair operation, in turn, will trigger a number of file operations in the %TEMP% folder of the user triggering the repair. Some of these operations will be performed from a SYSTEM context (started via the Windows Installer service), including the execution of temporary files. An attacker may be able to provide malicious binaries to the Windows Installer, which will be executed with high privilege, leading to a local privilege escalation. This issue affects Juniper Networks Juniper Identity Management Service (JIMS) versions prior to 1.4.0.
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Analysis
by VulDB Data Team • 04/20/2022
The vulnerability CVE-2022-22187 represents a critical improper privilege management flaw within the Windows Installer framework implementation in Juniper Networks Juniper Identity Management Service (JIMS). This issue stems from the service's failure to properly enforce privilege boundaries during repair operations, creating a pathway for unauthorized privilege escalation. The vulnerability specifically affects JIMS versions prior to 1.4.0, indicating that Juniper had not yet addressed this fundamental security weakness in their software distribution. The flaw operates through a cascading privilege escalation mechanism where a low-privileged user can initiate a repair process that subsequently executes with elevated SYSTEM privileges through the Windows Installer service.
The technical execution of this vulnerability occurs through the Windows Installer framework's inherent design where repair operations are intended to restore system integrity by performing file operations in the %TEMP% directory. However, the JIMS implementation fails to properly isolate these operations from unprivileged user contexts. When a user triggers a repair operation, the Windows Installer service, which runs with SYSTEM privileges, processes the repair by executing temporary files located in the user's %TEMP% directory. This creates an attack surface where malicious binaries can be placed in the temporary directory and subsequently executed with SYSTEM privileges. The underlying mechanism leverages the Windows Installer's service architecture to escalate privileges, bypassing normal user access controls and privilege enforcement mechanisms.
The operational impact of this vulnerability extends beyond simple privilege escalation, creating a comprehensive attack vector that aligns with several ATT&CK framework techniques including privilege escalation through exploitation of software vulnerabilities and execution through Windows Installer. The vulnerability's exploitation requires minimal user interaction beyond initiating a repair operation, making it particularly dangerous in environments where users may have legitimate access to the system. From a CWE perspective, this vulnerability maps to CWE-276, which describes improper privileges, and potentially CWE-78, which covers OS command injection. The attack scenario allows for persistent backdoor installation, system compromise, and potential lateral movement within the network, as the attacker can execute arbitrary code with SYSTEM privileges.
Mitigation strategies for CVE-2022-22187 should focus on immediate software updates to JIMS version 1.4.0 or later, which addresses the privilege management flaw. Organizations should also implement temporary mitigations including restricting write access to %TEMP% directories for unprivileged users, monitoring Windows Installer service operations, and conducting security audits of the JIMS installation. Network segmentation and privilege separation should be enforced to limit the potential impact of successful exploitation. Additionally, security teams should monitor for unusual repair operations or file creation patterns in temporary directories, as these activities may indicate exploitation attempts. The vulnerability highlights the critical importance of proper privilege management in installer frameworks and demonstrates how seemingly benign administrative functions can create significant security risks when not properly isolated from user contexts.