CVE-2012-4758 in PowerProducer
Summary
by MITRE
Multiple untrusted search path vulnerabilities in CyberLink PowerProducer 5.5.3.2325 allow local users to gain privileges via a Trojan horse (1) mfc71loc.dll or (2) mfc71enu.dll file in the current working directory, as demonstrated by a directory that contains a .ppp or .rdf file. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 04/16/2017
This vulnerability exists in CyberLink PowerProducer version 5.5.3.2325 and represents a classic untrusted search path weakness that enables local privilege escalation through malicious dynamic link library injection. The flaw occurs when the application loads DLL files from the current working directory without proper validation of their source or authenticity. Specifically, attackers can place malicious mfc71loc.dll or mfc71enu.dll files in the same directory as a targeted .ppp or .rdf file, causing the application to execute arbitrary code with elevated privileges when processing these files. This vulnerability falls under CWE-426 which describes the weakness of untrusted search path usage, and aligns with ATT&CK technique T1068 which covers privilege escalation through the exploitation of system vulnerabilities. The attack vector leverages the application's trust in the current working directory for DLL resolution, a common pattern in Windows applications that fail to implement secure library loading practices.
The operational impact of this vulnerability extends beyond simple local privilege escalation to potentially enable full system compromise when users process malicious files. CyberLink PowerProducer is commonly used for video editing and production, making it a prime target for attackers who could distribute malicious .ppp or .rdf files through various social engineering vectors. When users open these files, the application's improper DLL loading behavior triggers execution of the attacker-controlled DLLs, effectively allowing code execution at the privilege level of the victim user. The vulnerability's exploitation requires local access and user interaction, but the potential for privilege escalation makes it particularly dangerous in environments where users may process untrusted multimedia content from various sources including email attachments, file sharing platforms, or malicious websites.
Mitigation strategies for this vulnerability should focus on implementing secure coding practices and system hardening measures. Organizations should ensure that all applications properly implement the secure DLL loading mechanism by using LoadLibraryEx with the LOAD_WITH_ALTERED_SEARCH_PATH flag or by explicitly specifying full paths to required libraries. System administrators should consider implementing application whitelisting policies that restrict which executables can run in critical environments, and users should be educated about the risks of processing untrusted multimedia files. The vulnerability also highlights the importance of keeping software updated, as this issue was likely addressed in subsequent versions of CyberLink PowerProducer through proper DLL loading implementation. Security monitoring should include detection of suspicious DLL loading patterns and unauthorized modifications to application directories, particularly in environments where users may process multimedia files from untrusted sources. Organizations should also consider implementing least privilege principles where possible to limit the impact of potential exploitation, as the vulnerability requires local access and user interaction to be effective.