CVE-2001-0290 in Mailman
Summary
by MITRE
Vulnerability in Mailman 2.0.1 and earlier allows list administrators to obtain user passwords.
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Analysis
by VulDB Data Team • 10/07/2025
The vulnerability identified as CVE-2001-0290 represents a critical security flaw within Mailman version 2.0.1 and earlier installations that fundamentally compromises user authentication mechanisms. This vulnerability specifically targets the list administrator functionality within the Mailman mailing list management system, creating an unauthorized access vector that enables malicious actors with list administrator privileges to extract user passwords from the system. The flaw exists within the password handling and retrieval mechanisms of the software, potentially allowing attackers to escalate their privileges and gain unauthorized access to user accounts. This issue directly impacts the integrity and confidentiality of user authentication data within mailing list environments, making it particularly dangerous for organizations relying on Mailman for email distribution and communication.
The technical implementation of this vulnerability stems from inadequate input validation and insufficient access controls within the Mailman administrative interface. When list administrators attempt to access user information through the system's management functions, the software fails to properly validate the administrative privileges of the requesting user or properly sanitize the data being returned. This creates a scenario where authenticated administrators can exploit the system to retrieve password hashes or plain text passwords associated with mailing list users. The vulnerability operates at the application layer and typically requires an attacker to first obtain legitimate administrative credentials, though the flaw itself allows for further exploitation once those credentials are acquired. This weakness aligns with CWE-284, which addresses improper access control, and demonstrates how insufficient privilege validation can create pathways for unauthorized data access.
The operational impact of CVE-2001-0290 extends beyond simple credential theft, as it can lead to widespread compromise of mailing list environments and potentially broader network infiltration. Organizations utilizing Mailman for business communications, open source project coordination, or community distribution may experience significant security breaches when this vulnerability is exploited, particularly if administrators reuse passwords across multiple systems. The vulnerability can result in unauthorized access to sensitive mailing list communications, potential spam distribution through compromised accounts, and the ability to manipulate mailing list configurations to maintain persistent access. Attackers can leverage this vulnerability to conduct man-in-the-middle attacks, relay messages through compromised lists, or use stolen credentials to access other systems where users may have reused passwords, making this a particularly dangerous flaw in environments where password reuse is common.
Mitigation strategies for CVE-2001-0290 should prioritize immediate patching of affected Mailman installations to version 2.0.2 or later, which contains the necessary security fixes to prevent unauthorized password access. Organizations should implement strict access control policies limiting administrative privileges to only essential personnel and regularly audit administrative access logs to detect potential misuse. Network segmentation and monitoring of administrative interfaces can help detect anomalous access patterns that may indicate exploitation attempts. Security teams should also enforce strong password policies and implement multi-factor authentication for administrative accounts to reduce the impact if credentials are compromised. The vulnerability highlights the importance of proper privilege management and access control mechanisms as outlined in the mitre ATT&CK framework under privilege escalation techniques, emphasizing that even authenticated users with administrative rights must be properly monitored and restricted to prevent abuse of their elevated privileges. Regular security assessments and vulnerability scanning should be conducted to identify similar flaws in other applications and systems within the organization's infrastructure.