CVE-2007-3633 in Chilkat Zip ActiveX control
Summary
by MITRE
Absolute path traversal vulnerability in the Chilkat Software Chilkat Zip ActiveX control in ChilkatZip2.dll 12.4.2.0 allows remote attackers to create or overwrite arbitrary files via a full pathname in the argument to the (1) SaveLastError method and probably the (2) WriteExe method.
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Analysis
by VulDB Data Team • 09/25/2024
The CVE-2007-3633 vulnerability represents a critical absolute path traversal flaw within the Chilkat Software Chilkat Zip ActiveX control, specifically affecting version 12.4.2.0 of ChilkatZip2.dll. This vulnerability exists in the way the ActiveX control handles file path arguments during method execution, creating a significant security risk for systems that utilize this component. The flaw manifests when the control processes full pathnames passed as arguments to specific methods, allowing unauthorized file system manipulation through remote code execution vectors. This type of vulnerability falls under the CWE-22 category, which specifically addresses path traversal attacks that enable attackers to access files outside the intended directory structure. The vulnerability impacts systems where the Chilkat Zip ActiveX control is deployed, particularly in web applications or server environments where ActiveX components are utilized for file compression and decompression operations.
The technical implementation of this vulnerability occurs in the SaveLastError method and potentially the WriteExe method of the Chilkat Zip ActiveX control. When these methods receive a full pathname as an argument, the control fails to properly validate or sanitize the path before attempting file system operations. This allows attackers to craft malicious input that includes absolute paths, effectively bypassing normal file access controls and directory restrictions. The flaw essentially enables attackers to write files to any location on the target system where the application process has write permissions, potentially leading to arbitrary code execution, data corruption, or privilege escalation. The vulnerability demonstrates a classic lack of input validation and proper path sanitization, which are fundamental security practices that should prevent such path traversal scenarios. According to the ATT&CK framework, this vulnerability maps to the T1059.007 technique for command and script interpreter, as it enables remote attackers to execute arbitrary commands through file system manipulation.
The operational impact of CVE-2007-3633 extends beyond simple file system access, as it creates potential pathways for more sophisticated attacks within compromised environments. Attackers can leverage this vulnerability to overwrite critical system files, inject malicious code into existing applications, or create backdoor access points through file manipulation. The vulnerability is particularly dangerous in web server environments where ActiveX controls are used to process user-supplied data, as it can be exploited through web interfaces without requiring local system access. Systems running vulnerable versions of the Chilkat Zip ActiveX control are at risk of complete compromise, especially when the application process runs with elevated privileges. The vulnerability's remote exploitability means that attackers do not need physical access to the system, making it particularly concerning for enterprise environments and cloud deployments. Organizations utilizing this ActiveX control should consider the broader implications of this vulnerability on their overall security posture, as it represents a potential entry point for lateral movement and persistent access within network environments.
Mitigation strategies for CVE-2007-3633 should focus on immediate patching and architectural defenses. The primary recommendation involves updating to the latest version of the Chilkat Zip ActiveX control that addresses this path traversal vulnerability. Organizations should also implement strict input validation and sanitization measures for any user-supplied data that might be processed by the ActiveX control. Network segmentation and privilege separation can help limit the impact of successful exploitation by ensuring that applications using this control operate with minimal required permissions. Additionally, monitoring systems should be deployed to detect suspicious file system activities that might indicate exploitation attempts. The vulnerability highlights the importance of secure coding practices and proper input validation, particularly for components that interact with file systems. Organizations should conduct comprehensive vulnerability assessments to identify other potentially vulnerable ActiveX controls or similar components within their infrastructure, as this represents a broader class of path traversal vulnerabilities that can affect various software components. The ATT&CK framework suggests implementing defensive measures such as application whitelisting and process monitoring to detect and prevent exploitation attempts targeting this type of vulnerability.