CVE-2012-2753 in EndPoint Connect
Summary
by MITRE
Untrusted search path vulnerability in TrGUI.exe in the Endpoint Connect (aka EPC) GUI in Check Point Endpoint Security R73.x and E80.x on the VPN blade platform, Endpoint Security VPN R75, Endpoint Connect R73.x, and Remote Access Clients E75.x allows local users to gain privileges via a Trojan horse DLL in the current working directory.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 03/25/2021
The vulnerability identified as CVE-2012-2753 represents a critical untrusted search path issue affecting Check Point Endpoint Security products including Endpoint Connect GUI components. This flaw exists within TrGUI.exe executable which is part of the Endpoint Connect suite running on VPN blade platforms. The vulnerability specifically impacts versions R73.x and E80.x of Endpoint Security, as well as Endpoint Security VPN R75, Endpoint Connect R73.x, and Remote Access Clients E75.x. The core technical issue stems from improper handling of dynamic link library loading sequences where the application fails to validate the source of loaded modules, creating a path traversal vulnerability that can be exploited by local attackers.
The technical implementation of this vulnerability leverages the Windows dynamic link library loading mechanism which searches for required DLL files in a specific order including the current working directory. When TrGUI.exe executes, it attempts to load dependent DLL libraries without proper validation of their source or authenticity. This behavior creates a window of opportunity for malicious actors to place a specially crafted Trojan horse DLL file in the same directory as the vulnerable executable, effectively allowing arbitrary code execution with the privileges of the running process. The vulnerability is classified as a privilege escalation issue because local users can leverage this flaw to execute malicious code with elevated privileges, potentially leading to complete system compromise. This weakness directly maps to CWE-426 Untrusted Search Path, which specifically addresses the dangers of allowing applications to load libraries from untrusted locations.
The operational impact of this vulnerability extends beyond simple local privilege escalation as it provides attackers with a persistent foothold within the network infrastructure. Since the vulnerable components are typically installed on VPN blade platforms, successful exploitation could enable attackers to maintain access to critical network resources while bypassing traditional security controls. The attack vector is particularly concerning because it requires minimal privileges and can be executed through simple file placement operations. The vulnerability affects enterprise environments where endpoint security solutions are deployed, making it attractive to threat actors seeking to compromise high-value targets. Network defenders face significant challenges in detecting such attacks since they occur through legitimate application execution paths rather than through network-based exploitation.
Mitigation strategies for CVE-2012-2753 should prioritize immediate patching of affected systems to address the root cause of the untrusted search path vulnerability. Organizations must ensure that all affected versions of Check Point Endpoint Security products are updated to patched releases that implement proper DLL loading validation. System administrators should also implement strict directory permissions and file integrity monitoring to detect unauthorized DLL placements. The principle of least privilege should be enforced by running vulnerable executables with minimal required permissions and by implementing application whitelisting policies that prevent execution of unauthorized DLL files. Additionally, network segmentation and monitoring solutions should be deployed to detect anomalous file placement activities in directories containing critical executables, providing defense-in-depth against this class of vulnerability. This approach aligns with ATT&CK technique T1068 for local privilege escalation and T1546 for persistence mechanisms that exploit dynamic link library loading behaviors.