CVE-2007-4252 in ASP String
Summary
by MITRE
Absolute path traversal vulnerability in a certain ActiveX control in CkString.dll 1.1 and earlier in CHILKAT ASP String allows remote attackers to create or overwrite arbitrary files via a full pathname in the first argument to the SaveToFile method, a different vulnerability than CVE-2007-3633.
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Analysis
by VulDB Data Team • 09/29/2024
The CVE-2007-4252 vulnerability represents a critical absolute path traversal flaw within the CHILKAT ASP String ActiveX control component. This vulnerability specifically affects versions 1.1 and earlier of the CkString.dll library, which is part of the broader CHILKAT ASP String framework. The flaw exists in the SaveToFile method of the ActiveX control, where the first argument accepts a full pathname that is not properly validated or sanitized. This allows remote attackers to manipulate the file system by specifying absolute paths that can result in the creation or overwriting of arbitrary files on the target system.
The technical implementation of this vulnerability stems from inadequate input validation within the ActiveX control's file handling mechanisms. When the SaveToFile method processes the first argument containing a full pathname, it does not perform proper sanitization to ensure that the path remains within acceptable boundaries. This lack of path validation creates an opportunity for attackers to specify absolute paths that bypass normal file system access controls. The vulnerability operates at the file system level, allowing attackers to write files to locations where they would normally not have permission to create or modify content, effectively circumventing standard security restrictions.
From an operational perspective, this vulnerability presents a severe risk to systems running affected versions of the CHILKAT ASP String ActiveX control. Remote attackers can exploit this weakness to upload malicious files to critical system directories, potentially leading to arbitrary code execution or system compromise. The impact extends beyond simple file manipulation as attackers can overwrite system files, configuration files, or even critical executables. This vulnerability particularly affects web applications that utilize the CHILKAT ASP String component for string manipulation and file handling operations, making it a significant concern for enterprise environments where such components are deployed.
The vulnerability aligns with CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. This classification emphasizes the fundamental flaw in path validation and access control mechanisms. From an attack framework perspective, this vulnerability maps to ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute malicious code through the created or modified files. Additionally, it relates to T1566 for credential access through the potential to overwrite system files containing sensitive information or authentication data.
Mitigation strategies for CVE-2007-4252 should prioritize immediate remediation through software updates to versions that address the path traversal vulnerability. Organizations must ensure that all instances of the CHILKAT ASP String ActiveX control are upgraded to patched versions that properly validate and sanitize file paths. Network segmentation and access controls should be implemented to limit exposure of systems running vulnerable components, particularly those accessible from untrusted networks. Input validation should be strengthened at all application layers, with proper path sanitization and directory restriction mechanisms implemented. Regular security assessments and vulnerability scanning should be conducted to identify and remediate similar path traversal vulnerabilities in other components and applications throughout the organization's infrastructure.