CVE-2007-6253 in Form Client
Summary
by MITRE
Multiple buffer overflows in Adobe Form Designer 5.0 and Form Client 5.0 allow remote attackers to execute arbitrary code via unknown vectors in the (1) Adobe File Dialog Button (FileDlg.dll) and the (2) Adobe Copy to Server Object (SvrCopy.dll) ActiveX controls.
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Analysis
by VulDB Data Team • 11/28/2024
Adobe Form Designer 5.0 and Form Client 5.0 contain multiple buffer overflow vulnerabilities in their ActiveX controls that create significant remote execution risks. These vulnerabilities exist in the Adobe File Dialog Button component (FileDlg.dll) and the Adobe Copy to Server Object component (SvrCopy.dll), both of which are critical attack vectors for malicious actors seeking to compromise systems. The buffer overflows occur due to insufficient input validation and memory management within these components, allowing attackers to craft malicious payloads that can overwrite critical memory locations. The vulnerabilities are particularly dangerous because they leverage ActiveX controls which are commonly enabled in web browsers and corporate environments, providing attackers with multiple potential entry points for exploitation.
The technical flaw manifests through improper bounds checking in the handling of user-supplied data within the FileDlg.dll and SvrCopy.dll libraries. When these components process file dialog operations or server copy functions, they fail to adequately validate the length and content of input parameters, leading to memory corruption that can be exploited to overwrite return addresses, function pointers, or other critical program structures. This type of vulnerability falls under CWE-121, which describes buffer overflow conditions where insufficient bounds checking allows memory to be overwritten beyond allocated boundaries. The nature of ActiveX controls in Windows environments means that successful exploitation can result in arbitrary code execution with the privileges of the compromised user, often running with elevated permissions due to the trusted nature of these components in web browsers.
The operational impact of CVE-2007-6253 extends beyond simple remote code execution to encompass complete system compromise and potential lateral movement within networks. Attackers can leverage these vulnerabilities to install backdoors, steal sensitive data, or establish persistent access to compromised systems. The attack surface is broad as these ActiveX controls are frequently deployed in enterprise environments for document processing and form management, making them attractive targets for advanced persistent threats. According to ATT&CK framework, this vulnerability maps to T1190 (Exploit Public-Facing Application) and T1059 (Command and Scripting Interpreter) as attackers can exploit the vulnerable components to execute malicious code and establish command execution capabilities. The remote nature of these attacks means that exploitation can occur without physical access to target systems, making the vulnerabilities particularly concerning for organizations with web-facing applications.
Mitigation strategies for CVE-2007-6253 should focus on immediate removal of vulnerable ActiveX controls from systems and web browsers where they are not strictly required. Organizations should implement strict ActiveX control policies that disable or restrict the execution of untrusted ActiveX components. Browser security settings should be configured to block ActiveX controls from untrusted sources, and regular security updates should be applied to Adobe products. Network segmentation and intrusion detection systems can help identify exploitation attempts, while endpoint protection solutions should be configured to monitor for suspicious ActiveX behavior. The vulnerability also highlights the importance of the principle of least privilege in system administration, ensuring that users have minimal necessary permissions to reduce the impact of successful exploitation. Organizations should conduct regular vulnerability assessments to identify and remediate similar issues in other ActiveX components and ensure that all Adobe products are updated to versions that address these specific buffer overflow conditions.