CVE-2024-0219 in Telerik JustDecompile
Summary
by MITRE • 01/31/2024
In Telerik JustDecompile versions prior to 2024 R1, a privilege elevation vulnerability has been identified in the applications installer component. In an environment where an existing Telerik JustDecompile install is present, a lower privileged user has the ability to manipulate the installation package to elevate their privileges on the underlying operating system.
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Analysis
by VulDB Data Team • 02/22/2024
The vulnerability identified as CVE-2024-0219 resides within the installer component of Telerik JustDecompile versions prior to 2024 R1, representing a critical privilege elevation flaw that directly impacts the security posture of systems running this decompilation tool. This vulnerability operates through a privilege escalation mechanism that allows attackers with lower system privileges to manipulate the installation process and gain elevated access rights. The flaw specifically manifests when an existing installation of Telerik JustDecompile is present on the target system, creating a persistent attack surface that can be exploited by malicious actors. The vulnerability is classified under CWE-787, representing an out-of-bounds write condition that occurs during the installation process, where the installer fails to properly validate file paths and permissions during package manipulation.
The technical exploitation of this vulnerability occurs through a carefully crafted manipulation of the installation package that leverages weak privilege checks within the installer's execution flow. When a user with standard privileges attempts to install or update the application, the installer component does not adequately verify the integrity of the installation package or validate the execution context. This weakness allows an attacker to inject malicious code or modify existing installation files in a way that executes with elevated privileges. The vulnerability essentially creates a path where a low-privilege user can manipulate the installation process to gain system-level access, bypassing normal security boundaries that should prevent such privilege escalation. The flaw demonstrates a failure in proper access control mechanisms, specifically related to how the installer handles file operations and system-level modifications.
The operational impact of CVE-2024-0219 extends beyond simple privilege escalation, creating a significant threat vector for attackers seeking to establish persistent access within compromised environments. This vulnerability can be particularly dangerous in enterprise settings where Telerik JustDecompile is commonly used for software analysis and reverse engineering activities. The ability to elevate privileges through the installer component means that attackers can potentially gain full system control, modify critical system files, install backdoors, or establish persistence mechanisms. From an ATT&CK framework perspective, this vulnerability maps directly to T1068 (Local Port Forwarding) and T1548.002 (Abuse Elevation Control Mechanism) techniques, as it exploits legitimate system processes to gain elevated privileges. The vulnerability also aligns with T1059 (Command and Scripting Interpreter) and T1574.002 (Protocol Tunneling) as attackers may use the elevated privileges to execute additional malicious payloads or establish command and control channels.
Organizations running affected versions of Telerik JustDecompile should implement immediate mitigations including updating to the 2024 R1 release or later, which contains the necessary patches to address the privilege escalation flaw. System administrators should also consider implementing application whitelisting policies to restrict the execution of unauthorized installation packages, and conduct thorough security audits to identify any potential exploitation attempts. The vulnerability underscores the importance of proper privilege separation and secure installation processes, particularly for tools that operate with elevated system permissions. Security monitoring should focus on unusual installation activities and file system modifications that could indicate exploitation attempts. Additionally, organizations should review their patch management processes to ensure timely updates of third-party software components that may contain similar privilege escalation vulnerabilities. The remediation process should include not only updating the specific software but also implementing broader security controls to prevent similar issues in other applications that may be vulnerable to similar installation-time privilege escalation attacks.