CVE-2018-4938 in ColdFusion
Summary
by MITRE
Adobe ColdFusion Update 5 and earlier versions, ColdFusion 11 Update 13 and earlier versions have an exploitable Insecure Library Loading vulnerability. Successful exploitation could lead to local privilege escalation.
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Analysis
by VulDB Data Team • 05/06/2025
The vulnerability identified as CVE-2018-4938 represents a critical insecure library loading flaw affecting Adobe ColdFusion versions 5 and earlier, as well as ColdFusion 11 Update 13 and earlier versions. This vulnerability resides in the application's dynamic library loading mechanism, which fails to properly validate or sanitize the paths from which shared libraries are loaded. The flaw allows attackers to manipulate the library loading process by placing malicious DLL files in strategic locations within the system's library search path, thereby enabling unauthorized code execution with elevated privileges. The vulnerability is classified under CWE-427 Uncontrolled Search Path Element, which specifically addresses situations where applications search for libraries in insecure locations that could be manipulated by attackers. This issue is particularly dangerous because it can be exploited to achieve local privilege escalation, allowing an attacker with limited access to potentially gain administrative rights on the affected system.
The technical exploitation of this vulnerability relies on the inherent weaknesses in ColdFusion's library loading behavior where the application does not enforce strict path validation during dynamic library resolution. Attackers can leverage this weakness by placing malicious shared libraries in directories that are searched before the legitimate library locations, typically taking advantage of the Windows library search order mechanism. When ColdFusion attempts to load a required library, it may inadvertently load the attacker-controlled malicious library instead of the intended legitimate one. This behavior creates a window of opportunity for privilege escalation attacks, particularly when the ColdFusion service runs with elevated privileges. The vulnerability is categorized under the ATT&CK technique T1068 Exploitation for Privilege Escalation, which specifically addresses methods used to gain higher-level permissions through software exploitation. The attack vector typically involves placing crafted DLL files in locations such as the current working directory or other directories that appear earlier in the system's library search path.
The operational impact of CVE-2018-4938 extends beyond simple code execution to encompass significant security implications for enterprise environments running vulnerable ColdFusion installations. Organizations utilizing these older versions face substantial risk as attackers can exploit this vulnerability to establish persistent access, escalate privileges, and potentially compromise entire network infrastructures. The vulnerability affects systems where ColdFusion is installed with default configurations that do not properly isolate library loading processes from potential attack vectors. This flaw is particularly concerning in environments where ColdFusion applications handle sensitive data or serve as critical business applications, as successful exploitation could lead to data breaches, system compromise, and unauthorized access to corporate resources. The impact is amplified when considering that many organizations maintain legacy systems running older ColdFusion versions due to compatibility requirements or migration delays, leaving these systems vulnerable to exploitation without proper patching or mitigation strategies. Security teams must prioritize this vulnerability as part of their remediation efforts, particularly in environments where ColdFusion applications are exposed to untrusted users or network access.
Organizations should implement immediate mitigations including applying the vendor-provided patches and updates that address the insecure library loading vulnerability in affected ColdFusion versions. The recommended approach involves upgrading to patched versions of ColdFusion that properly validate library loading paths and implement secure library resolution mechanisms. System administrators should also consider implementing additional security controls such as restricting write access to ColdFusion installation directories and implementing strict library search path policies. The mitigation strategies should include monitoring for suspicious library loading activities and implementing application whitelisting controls to prevent unauthorized DLL execution. Organizations should also conduct comprehensive vulnerability assessments to identify all instances of vulnerable ColdFusion installations and prioritize remediation efforts based on risk exposure. Implementation of these security measures aligns with the ATT&CK mitigation techniques that focus on reducing attack surface and preventing exploitation of known vulnerabilities through proper patch management and secure configuration practices. Additionally, security monitoring should be enhanced to detect potential exploitation attempts through unusual library loading patterns or privilege escalation activities that may indicate successful exploitation of this vulnerability.