CVE-1999-0800 in Forums
Summary
by MITRE
The GetFile.cfm file in Allaire Forums allows remote attackers to read files through a parameter to GetFile.cfm.
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Analysis
by VulDB Data Team • 12/07/2024
The vulnerability identified as CVE-1999-0800 resides within the Allaire Forums application, specifically in the GetFile.cfm component which handles file retrieval operations. This represents a classic arbitrary file access flaw that enables remote attackers to bypass normal access controls and read files from the underlying file system. The vulnerability stems from insufficient input validation and sanitization within the file parameter processing mechanism, allowing malicious actors to manipulate the parameter and gain unauthorized access to sensitive system files. The affected application appears to lack proper authorization checks and path traversal protections, creating an exploitable condition where any remote user can request arbitrary file paths through the GetFile.cfm interface.
The technical implementation of this vulnerability demonstrates a path traversal attack vector where the GetFile.cfm script accepts user-supplied parameters without adequate filtering or validation. Attackers can construct malicious file paths using directory traversal sequences such as ../ or ..\ to navigate outside the intended directory boundaries and access files that should remain restricted. This flaw operates at the application layer and can be exploited through HTTP requests that target the vulnerable component, making it particularly dangerous as it requires no special privileges or local access. The vulnerability essentially allows an attacker to perform unauthorized file system operations, potentially exposing sensitive information including configuration files, database credentials, application source code, and other confidential data stored on the server.
The operational impact of CVE-1999-0800 extends beyond simple information disclosure, as successful exploitation can lead to complete system compromise. An attacker who successfully exploits this vulnerability can access critical system files, including but not limited to web server configuration files, application source code, database connection strings, and potentially operating system files. This information disclosure can facilitate further attacks by providing attackers with insights into the system architecture, application logic, and potential security weaknesses. The vulnerability also poses significant risk to data confidentiality and integrity, as sensitive files containing personal information, business data, or proprietary code can be accessed and potentially modified. Organizations running Allaire Forums applications are particularly vulnerable as this flaw affects the core file handling functionality of the platform, making it a critical security concern for any deployment.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and access control mechanisms. The most effective immediate solution involves sanitizing all user-supplied parameters through strict validation that rejects potentially malicious input sequences including directory traversal patterns. Organizations should implement a whitelist approach for file access, allowing only specific, pre-approved files to be retrieved through the GetFile.cfm interface. Additionally, proper authorization checks must be enforced to ensure that only authenticated users with appropriate privileges can access file retrieval functions. System administrators should also implement proper file system permissions and ensure that the application runs with minimal necessary privileges. This vulnerability aligns with CWE-22 Path Traversal and CWE-73 Path Traversal, and maps to ATT&CK technique T1083 File and Directory Discovery, emphasizing the need for comprehensive defensive measures including network segmentation, regular security audits, and application security reviews to prevent exploitation of similar vulnerabilities in other components.