CVE-2000-1132 in DCForum
Summary
by MITRE
DCForum cgforum.cgi CGI script allows remote attackers to read arbitrary files, and delete the program itself, via a malformed "forum" variable.
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Analysis
by VulDB Data Team • 08/01/2024
The vulnerability identified as CVE-2000-1132 resides within the DCForum cgforum.cgi CGI script, representing a critical security flaw that enables remote attackers to exploit file system access and system integrity violations. This vulnerability manifests through improper input validation mechanisms within the forum variable parameter, allowing malicious actors to manipulate the script's behavior and gain unauthorized access to system resources. The affected DCForum implementation fails to properly sanitize user-supplied input, creating a direct path for attackers to execute arbitrary file operations on the underlying system.
The technical exploitation of this vulnerability occurs through a malformed "forum" variable that bypasses normal input validation checks. When an attacker submits a specially crafted forum parameter, the CGI script processes the input without adequate sanitization, enabling path traversal attacks and arbitrary file access. This flaw directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal vulnerabilities. Attackers can leverage this vulnerability to read sensitive system files, configuration data, and potentially access restricted directories that should normally be protected from unauthorized access.
The operational impact of CVE-2000-1132 extends beyond simple information disclosure to include system compromise and potential service disruption. Remote attackers can not only read arbitrary files but also delete the program itself, which represents a severe escalation of privileges. This capability allows adversaries to completely remove the forum application, potentially disrupting legitimate user access and service availability. The vulnerability can be exploited through standard web browser interactions, making it particularly dangerous as it requires no special tools or privileges beyond basic network connectivity to the affected web server. The attack surface is further expanded by the fact that this vulnerability affects the core CGI script functionality, making it a critical target for exploitation.
Mitigation strategies for this vulnerability should focus on implementing proper input validation and sanitization mechanisms within the CGI script. The most effective approach involves implementing strict parameter validation that rejects any input containing path traversal sequences or special characters that could be used to manipulate file system access. Organizations should also consider implementing web application firewalls that can detect and block suspicious parameter patterns associated with path traversal attacks. Additionally, regular security audits and input validation testing should be conducted to identify similar vulnerabilities in other CGI scripts and web applications. The vulnerability demonstrates the critical importance of following secure coding practices and implementing proper access controls, aligning with ATT&CK technique T1059.007 for command and script injection. System administrators should also implement least privilege principles for web application execution, ensuring that CGI scripts operate with minimal necessary permissions to reduce the potential impact of such vulnerabilities.