CVE-2000-0037 in Majordomo
Summary
by MITRE
Majordomo wrapper allows local users to gain privileges by specifying an alternate configuration file.
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Analysis
by VulDB Data Team • 11/28/2024
The vulnerability described in CVE-2000-0037 resides within the Majordomo mailing list management system, a widely deployed tool for managing email lists in Unix environments during the late 1990s and early 2000s. This particular flaw represents a classic privilege escalation vulnerability that exploits the software's handling of configuration file paths and execution contexts. The issue manifests when local users can manipulate the system's configuration file resolution process to execute commands with elevated privileges, typically through the wrapper script that interfaces with the underlying Majordomo utilities.
The technical mechanism behind this vulnerability involves the Majordomo wrapper script's improper validation of configuration file paths and its failure to properly sanitize user input during command execution. When the wrapper processes commands, it often relies on a default configuration file location that can be overridden by local users through environment variables or command-line parameters. This allows attackers to specify an alternate configuration file that contains malicious directives or points to executables with higher privileges. The flaw stems from the wrapper's assumption that it will always operate with the intended configuration file, without implementing proper access controls or path validation checks that would prevent unauthorized modifications.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential system compromise and unauthorized access to sensitive mailing list data. Local users who exploit this vulnerability can effectively gain administrative privileges over the mailing list system, potentially allowing them to modify list memberships, access confidential communications, or even execute arbitrary commands on the host system. This represents a significant security risk in environments where multiple users share the same system and where the Majordomo system is configured with elevated privileges. The vulnerability particularly affects Unix-based systems where the wrapper script may be executed with setuid permissions, creating an attack surface that can be leveraged for broader system compromise.
Organizations affected by this vulnerability should implement immediate mitigations including updating to patched versions of Majordomo, implementing proper access controls on configuration files, and reviewing the wrapper script's execution context. The vulnerability aligns with CWE-276, which addresses improper file permissions, and can be categorized under ATT&CK technique T1068, which covers local privilege escalation through configuration file manipulation. Security administrators should also consider implementing file integrity monitoring to detect unauthorized modifications to the wrapper scripts and configuration files, while ensuring that all system components follow the principle of least privilege. Additionally, this vulnerability underscores the importance of proper input validation and secure coding practices, particularly when dealing with system-level utilities that handle user-provided parameters and configuration data.