CVE-2000-0431 in Cobalt RaQ
Summary
by MITRE
Cobalt RaQ2 and RaQ3 does not properly set the access permissions and ownership for files that are uploaded via FrontPage, which allows attackers to bypass cgiwrap and modify files.
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Analysis
by VulDB Data Team • 04/21/2026
The vulnerability identified as CVE-2000-0431 affects Cobalt RaQ2 and RaQ3 web servers that utilize FrontPage extensions for file management. This issue represents a critical access control flaw that stems from improper file permission and ownership settings during the file upload process. The vulnerability specifically manifests when files are uploaded through FrontPage extensions, creating a pathway for unauthorized modification of system resources that should remain protected. The flaw exists at the operating system level where the web server fails to properly enforce file access controls, allowing attackers to exploit this weakness to bypass security mechanisms designed to protect system integrity.
The technical implementation of this vulnerability involves the failure of the Cobalt RaQ server to properly configure file permissions and ownership when processing uploads through FrontPage extensions. When FrontPage uploads files to the web server, the system does not correctly set the necessary access controls that would normally prevent unauthorized modification of system files. This creates an environment where attackers can leverage the improperly configured permissions to gain elevated privileges and modify files that should be restricted to authorized users only. The vulnerability specifically impacts the cgiwrap functionality, which is designed to provide secure execution of CGI scripts by setting appropriate user permissions and preventing unauthorized access to system resources.
From an operational impact perspective, this vulnerability enables attackers to bypass the standard security controls that protect web server resources and system integrity. The ability to modify files through this weakness allows for potential system compromise, data manipulation, and unauthorized access to sensitive information. Attackers can exploit this vulnerability to gain persistent access to the system, potentially leading to complete system takeover. The impact extends beyond simple file modification as it undermines the fundamental security model of the web server, allowing unauthorized users to bypass the normal access control mechanisms that protect system resources from unauthorized modification. This vulnerability particularly affects organizations relying on Cobalt RaQ servers for web hosting services, where the compromise of a single server could result in widespread service disruption and data loss.
The mitigation strategies for this vulnerability require immediate attention and multiple layers of protection. System administrators should implement proper file permission settings to ensure that uploaded files maintain appropriate access controls and ownership. The recommended approach involves configuring the web server to enforce strict file permission policies during the upload process, ensuring that files are created with appropriate ownership and access restrictions. Additionally, organizations should consider disabling FrontPage extensions if they are not required for business operations, as this eliminates the attack surface associated with the vulnerability. The implementation of proper access control lists and regular security audits can help detect and prevent unauthorized file modifications. This vulnerability aligns with CWE-276, which addresses improper file permissions, and corresponds to techniques described in the MITRE ATT&CK framework under privilege escalation and persistence tactics. Organizations should also consider implementing intrusion detection systems to monitor for suspicious file modification activities and establish regular security patching procedures to prevent exploitation of known vulnerabilities. The remediation process should include comprehensive testing to ensure that file upload processes properly enforce access controls and that the cgiwrap functionality operates as intended without allowing unauthorized modifications.