CVE-2000-1016 in Linux
Summary
by MITRE
The default configuration of Apache (httpd.conf) on SuSE 6.4 includes an alias for the /usr/doc directory, which allows remote attackers to read package documentation and obtain system configuration information via an HTTP request for the /doc/packages URL.
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Analysis
by VulDB Data Team • 10/11/2025
The vulnerability described in CVE-2000-1016 represents a classic misconfiguration issue that exposed sensitive system information through web server configuration flaws. This weakness specifically affected Apache HTTP server installations on SuSE Linux 6.4 systems where the default httpd.conf file contained an alias directive pointing to the /usr/doc directory. The configuration allowed unauthorized remote access to package documentation and system configuration data through simple HTTP requests targeting the /doc/packages URL path. This misconfiguration created an information disclosure vulnerability that could be exploited by attackers without requiring authentication or special privileges.
The technical flaw stems from improper access control implementation within the Apache web server configuration, specifically violating the principle of least privilege by exposing system documentation directories to external network access. The vulnerability manifests when the web server processes requests for the /doc/packages URL, which maps to the /usr/doc directory containing package documentation files and system configuration information. This issue falls under CWE-200, which categorizes improper information exposure, and represents a direct violation of secure configuration practices. The flaw operates at the application layer of the network stack, making it particularly dangerous as it can be exploited through standard HTTP protocols without requiring specialized tools or techniques.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with valuable reconnaissance data that can be used for further exploitation attempts. The exposed documentation may contain system architecture details, package versions, installed software information, and potentially sensitive configuration parameters that could aid in crafting more sophisticated attacks. This vulnerability aligns with ATT&CK technique T1083, Information Discovery, as it enables adversaries to gather system information through web server access. The exposure of system configuration information could potentially reveal system layout, software versions, and architectural details that would otherwise be protected by proper access controls.
Mitigation strategies for this vulnerability involve immediate configuration changes to remove or restrict access to the problematic alias directive in the Apache configuration file. System administrators should modify the httpd.conf file to either remove the /doc alias entirely or implement proper access controls using directives such as Allow, Deny, or Require to restrict access to authorized personnel only. The recommended approach includes implementing directory-level access controls using <Directory> blocks with appropriate authentication mechanisms. Additionally, regular security audits of web server configurations should be conducted to identify and remediate similar misconfigurations. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for unauthorized access attempts to sensitive directories, as this vulnerability demonstrates how default configurations can create security risks that require ongoing vigilance and maintenance.