CVE-2000-0842 in UnixWare
Summary
by MITRE
The search97cgi/vtopic" in the UnixWare 7 scohelphttp webserver allows remote attackers to read arbitrary files via a .. (dot dot) attack.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 10/12/2025
The vulnerability identified as CVE-2000-0842 represents a critical directory traversal flaw within the scohelphttp webserver component of UnixWare 7 operating system. This weakness resides in the search97cgi/vtopic script which fails to properly validate user input when processing file requests, creating an avenue for malicious actors to access files outside the intended web root directory. The vulnerability specifically affects the web server's handling of path traversal sequences using the ".." (dot dot) notation, which is a well-established technique for navigating file system directories beyond the designated boundaries.
The technical implementation of this flaw stems from inadequate input sanitization within the web server's CGI script processing logic. When users submit requests containing directory traversal sequences, the application does not properly filter or normalize these paths before attempting to access files on the underlying file system. This allows attackers to craft malicious URLs that reference parent directories and access sensitive system files, configuration data, or other restricted resources that should remain protected from unauthorized access. The vulnerability operates at the application layer and requires no special privileges to exploit, making it particularly dangerous in environments where the web server has elevated file system permissions.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with the ability to read arbitrary files from the system. This could potentially expose sensitive configuration files, password databases, application source code, or other confidential data that may contain credentials, system architecture details, or business logic. The attack vector is straightforward and can be executed remotely without authentication, making it a high-risk vulnerability that could lead to further system compromise. Security professionals should consider this weakness in the context of broader web application security frameworks and recognize it as a variant of the common directory traversal attack pattern.
Organizations affected by this vulnerability should implement immediate mitigations including input validation for all web application components, particularly CGI scripts that handle file system operations. The recommended approach involves implementing proper path normalization and validation techniques that prevent directory traversal sequences from being processed. Security measures should include restricting web server permissions to minimize the impact of successful attacks and implementing web application firewalls to detect and block malicious path traversal attempts. This vulnerability aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory, and represents a classic example of how insufficient input validation can create security breaches. The attack pattern corresponds to techniques documented in the ATT&CK framework under T1059 and T1566, highlighting the importance of proper input sanitization in preventing unauthorized file access. System administrators should also consider upgrading to patched versions of UnixWare 7 or implementing network segmentation to limit exposure of vulnerable web server components to external threat actors.