CVE-2007-4309 in Lotus Notes
Summary
by MITRE
IBM Lotus Notes 5.x through 7.0.2 allows user-assisted remote authenticated administrators to obtain a cleartext notes.id password by setting the notes.ini (1) KFM_ShowEntropy and (2) Debug_Outfile debug variables, a different vulnerability than CVE-2005-2696.
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Analysis
by VulDB Data Team • 10/26/2017
This vulnerability exists in IBM Lotus Notes versions 5.x through 7.0.2 and represents a significant security flaw that allows authenticated administrators to extract cleartext passwords from the notes.id file through specific configuration variable manipulation. The vulnerability specifically leverages two debug variables in the notes.ini configuration file: KFM_ShowEntropy and Debug_Outfile, which when properly configured can expose sensitive authentication information. This represents a privilege escalation vulnerability where authenticated users can gain access to password information that should remain protected within the system's security boundaries. The flaw falls under CWE-200, Information Exposure, and more specifically aligns with CWE-312, Cleartext Storage of Sensitive Information, as it exposes password data in an unencrypted format during legitimate administrative operations.
The technical implementation of this vulnerability involves the manipulation of the notes.ini configuration file which governs various operational parameters of the Lotus Notes client and server environments. When an administrator sets the KFM_ShowEntropy variable to a specific value, it enables entropy display functionality that can reveal cryptographic information. The Debug_Outfile variable, when configured appropriately, directs debugging output to a specified file location where the cleartext password information becomes accessible. This configuration change requires administrative privileges to implement, making it a user-assisted remote attack where an authenticated administrator must knowingly configure these variables to expose the sensitive information. The vulnerability operates at the application level rather than at network or system levels, making it particularly concerning for environments where administrative access is granted to multiple users.
The operational impact of this vulnerability extends beyond simple information disclosure, as it provides attackers with direct access to authentication credentials that can be used for further exploitation within the Lotus Notes environment. Once an attacker gains access to the cleartext password, they can potentially impersonate users, access sensitive email communications, and perform administrative functions within the Notes system. This vulnerability creates a persistent threat vector that remains active as long as the debug variables remain configured, and the exposure can be maintained across system restarts. The risk is particularly elevated in multi-user environments where multiple administrators may have access to the configuration files, and where proper access controls and monitoring are not implemented. This vulnerability also represents a failure in the principle of least privilege as it allows for privilege escalation through legitimate administrative functions that should not expose sensitive data.
Organizations affected by this vulnerability should implement immediate mitigations including disabling the problematic debug variables in production environments, implementing strict access controls for notes.ini configuration files, and conducting comprehensive audits of administrative access permissions. System administrators should disable or remove the KFM_ShowEntropy and Debug_Outfile variables from all production configurations and ensure that only trusted personnel have access to modify these settings. The vulnerability demonstrates the importance of secure configuration management and proper privilege separation, as outlined in the NIST Cybersecurity Framework and ISO 27001 standards for information security management. Additionally, organizations should implement logging and monitoring for configuration changes to detect unauthorized modifications that could expose sensitive data, and consider implementing automated configuration management tools to prevent accidental or malicious configuration changes that could lead to information disclosure. This vulnerability highlights the critical need for proper security hardening practices and configuration management as part of the overall security posture of enterprise email and collaboration platforms.