CVE-2002-2006 in Tomcat
Summary
by MITRE
The default installation of Apache Tomcat 4.0 through 4.1 and 3.0 through 3.3.1 allows remote attackers to obtain the installation path and other sensitive system information via the (1) SnoopServlet or (2) TroubleShooter example servlets.
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Analysis
by VulDB Data Team • 08/31/2025
The vulnerability described in CVE-2002-2006 represents a critical information disclosure flaw affecting multiple versions of Apache Tomcat software. This security weakness specifically targets the default installations of Tomcat versions 3.0 through 3.3.1 and 4.0 through 4.1, where certain example servlets are enabled by default. The SnoopServlet and TroubleShooter example servlets, which are part of the standard Tomcat distribution, contain code that inadvertently exposes sensitive system information to remote attackers. These servlets were designed for diagnostic purposes but were not properly secured in their default configuration, creating a significant security risk for organizations that failed to disable or remove them from production environments.
The technical nature of this vulnerability stems from the improper implementation of security controls within the example servlets. The SnoopServlet and TroubleShooter components directly expose system information including the installation path, operating system details, and potentially other sensitive configuration data. This occurs because these servlets were intended for development and debugging purposes but were left enabled in production deployments. The flaw allows unauthenticated remote attackers to access this information through simple HTTP requests, making it particularly dangerous as it requires no special privileges or credentials to exploit. This type of vulnerability maps directly to CWE-200, which defines information exposure weaknesses in software systems.
The operational impact of this vulnerability extends beyond simple information disclosure, as the exposed installation paths and system details provide attackers with valuable reconnaissance data for subsequent attacks. Knowledge of the exact Tomcat installation directory enables attackers to craft more targeted exploits, potentially leading to privilege escalation or other advanced attack vectors. The information revealed could include operating system version details, Java runtime environment information, and server configuration parameters that would otherwise remain hidden. This vulnerability particularly affects organizations that deploy Tomcat without proper security hardening, leaving default example components accessible to external networks. According to ATT&CK framework, this represents a technique categorized under T1083 (File and Directory Discovery) and T1068 (Exploitation for Privilege Escalation) as attackers can use the disclosed information to plan more sophisticated attacks.
Organizations can mitigate this vulnerability through several defensive measures that align with industry best practices for web application security. The primary remediation involves disabling or removing the SnoopServlet and TroubleShooter example servlets from default installations, which directly addresses the root cause of the vulnerability. System administrators should ensure that only necessary components remain enabled in production environments, following the principle of least privilege. Additionally, implementing proper network segmentation and access controls can limit exposure even if the vulnerable components remain active. Regular security audits and vulnerability assessments should include checks for enabled example servlets and other default components that may pose similar risks. Organizations should also consider implementing web application firewalls and monitoring systems to detect unusual access patterns to these servlets. The remediation approach should follow NIST SP 800-53 security controls, particularly those related to system and information integrity, ensuring that systems are properly configured to prevent unauthorized information disclosure while maintaining operational functionality.