CVE-2008-3008 in Windows
Summary
by MITRE
Stack-based buffer overflow in the WMEncProfileManager ActiveX control in wmex.dll in Microsoft Windows Media Encoder 9 Series allows remote attackers to execute arbitrary code via a long first argument to the GetDetailsString method, aka "Windows Media Encoder Buffer Overrun Vulnerability."
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Analysis
by VulDB Data Team • 05/26/2025
The CVE-2008-3008 vulnerability represents a critical stack-based buffer overflow flaw within the Windows Media Encoder 9 Series WMEncProfileManager ActiveX control. This vulnerability specifically affects the wmex.dll component and manifests when the GetDetailsString method receives an excessively long first argument, creating a condition where attacker-controlled data can overwrite adjacent memory locations on the stack. The flaw exists due to inadequate input validation within the ActiveX control implementation, allowing malicious input to exceed the allocated buffer space and potentially corrupt program execution flow. This vulnerability is particularly concerning because it enables remote code execution without requiring local system access, making it an attractive target for attackers seeking to compromise systems through web-based attacks.
The technical exploitation of this vulnerability leverages the fundamental principles of stack-based buffer overflows as classified under CWE-121, where insufficient bounds checking allows data to overwrite stack memory regions including return addresses and function parameters. Attackers can craft malicious input strings that, when passed to the vulnerable GetDetailsString method, cause the stack pointer to be overwritten with malicious code addresses. The vulnerability operates within the context of ActiveX controls that are commonly enabled in Internet Explorer browsers, making web pages containing malicious ActiveX references a direct attack vector. This aligns with ATT&CK technique T1203, where adversaries leverage browser-based attacks to execute malicious code on target systems. The flaw essentially allows attackers to inject and execute arbitrary code with the privileges of the user running the vulnerable ActiveX control.
The operational impact of CVE-2008-3008 extends beyond simple remote code execution, as it represents a complete compromise of system integrity and confidentiality. Successful exploitation can result in full system control, data theft, persistence mechanisms, and lateral movement within network environments. The vulnerability affects systems running Windows Media Encoder 9 Series, which was widely deployed in enterprise environments, making the potential attack surface substantial. Organizations using older versions of Windows Media Player or Windows Media Encoder 9 Series are particularly at risk since these components were frequently integrated into web applications and corporate software distributions. The vulnerability's remote exploitability means that attackers do not need physical access to target systems, and the attack can be initiated through web browsers or web-based ActiveX-enabled applications.
Mitigation strategies for CVE-2008-3008 focus on both immediate remediation and long-term security hardening measures. The primary recommendation involves applying Microsoft security patches that address the specific buffer overflow in wmex.dll, which were released as part of Microsoft's regular security updates. Organizations should also implement ActiveX control restrictions through group policies and browser security settings to prevent automatic execution of potentially vulnerable ActiveX components. Network-based mitigations include implementing web application firewalls and content filtering systems that can detect and block malicious ActiveX content. Additionally, security teams should conduct comprehensive vulnerability assessments to identify systems running vulnerable versions of Windows Media Encoder 9 Series and ensure that all systems are updated to supported versions. The vulnerability demonstrates the importance of maintaining up-to-date software components and implementing defense-in-depth strategies that limit the attack surface of potentially vulnerable ActiveX controls. Organizations should also consider implementing runtime application self-protection measures and monitoring for anomalous behavior that might indicate exploitation attempts.