CVE-2007-4891 in Visual Studio
Summary
by MITRE
A certain ActiveX control in PDWizard.ocx 6.0.0.9782 and earlier in Microsoft Visual Studio 6.0 exposes dangerous (1) StartProcess, (2) SyncShell, (3) SaveAs, (4) CABDefaultURL, (5) CABFileName, and (6) CABRunFile methods, which allows remote attackers to execute arbitrary programs and have other impacts, as demonstrated using absolute pathnames in arguments to StartProcess and SyncShell.
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Analysis
by VulDB Data Team • 10/07/2024
The vulnerability described in CVE-2007-4891 represents a critical security flaw within the PDWizard.ocx ActiveX control version 6.0.0.9782 and earlier components distributed with Microsoft Visual Studio 6.0. This ActiveX control exposes six dangerous methods including StartProcess, SyncShell, SaveAs, CABDefaultURL, CABFileName, and CABRunFile that collectively create a significant attack surface for remote exploitation. The vulnerability stems from improper input validation and privilege escalation mechanisms within the ActiveX control's method implementations, allowing malicious actors to execute arbitrary code on vulnerable systems. The issue specifically manifests when absolute pathnames are passed as arguments to the StartProcess and SyncShell methods, which bypass normal security boundaries and enable unauthorized system access. This type of vulnerability falls under the CWE-74 standard for Improper Neutralization of Special Elements in Output Used by a Downstream Component, commonly known as injection flaws that occur when untrusted data is sent to an interpreter as part of a command or query.
The operational impact of this vulnerability extends beyond simple code execution to encompass a broad range of malicious activities that can compromise entire systems. Attackers can leverage the exposed methods to perform arbitrary file operations, execute malicious code with elevated privileges, and potentially establish persistent backdoors within compromised environments. The StartProcess and SyncShell methods are particularly dangerous as they can directly invoke system processes without proper authorization checks, while the SaveAs method allows for unauthorized file creation and modification operations. The CABDefaultURL, CABFileName, and CABRunFile methods further amplify the threat by enabling attackers to manipulate compressed archive files and execute code from remote locations. These capabilities align with ATT&CK techniques such as T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, demonstrating how this vulnerability can be used to establish initial access and maintain persistence within target networks. The vulnerability exists at the application layer and can be exploited through web browsers or other applications that load ActiveX controls, making it particularly dangerous in enterprise environments where ActiveX controls are commonly used for legacy application support.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The most effective immediate solution involves removing or disabling the vulnerable PDWizard.ocx ActiveX control from affected systems, particularly in environments where ActiveX controls are not essential for business operations. System administrators should implement strict security policies that prevent loading of untrusted ActiveX controls and enforce application whitelisting measures to restrict execution of potentially malicious code. The vulnerability also highlights the importance of proper input validation and privilege separation within ActiveX controls, which should be addressed through secure coding practices and regular security reviews. Organizations should consider implementing network segmentation and monitoring to detect suspicious activities related to ActiveX control usage, while also ensuring that legacy systems are properly updated or migrated to modern platforms that do not rely on potentially insecure ActiveX technologies. Additionally, the vulnerability demonstrates the critical need for regular security assessments of legacy software components and proper patch management procedures to prevent exploitation of known vulnerabilities in older development tools and runtime environments.