CVE-2008-1937 in MoinMoin
Summary
by MITRE
The user form processing (userform.py) in MoinMoin before 1.6.3, when using ACLs or a non-empty superusers list, does not properly manage users, which allows remote attackers to gain privileges.
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Analysis
by VulDB Data Team • 08/10/2019
The vulnerability identified as CVE-2008-1937 represents a critical access control flaw within the MoinMoin wiki software ecosystem, specifically affecting versions prior to 1.6.3. This issue manifests in the user form processing component known as userform.py, which serves as a critical interface for user authentication and authorization within the wiki platform. The flaw becomes particularly dangerous when the wiki implements Access Control Lists (ACLs) or maintains a non-empty superusers list, as these configurations create the conditions under which the privilege escalation vulnerability can be exploited.
The technical root cause of this vulnerability stems from improper user management within the userform.py processing logic. When MoinMoin handles user registration, authentication, or modification requests through this form processing module, it fails to adequately validate or sanitize user input parameters that could influence access control decisions. This inadequate input handling creates a pathway for remote attackers to manipulate the system's user management processes and potentially elevate their privileges to administrator or superuser levels. The vulnerability essentially allows malicious actors to bypass the intended access control mechanisms that should prevent unauthorized users from gaining elevated permissions within the wiki environment.
The operational impact of CVE-2008-1937 extends beyond simple privilege escalation, as it fundamentally compromises the security model of any MoinMoin installation that relies on ACLs or superuser lists for access control. Attackers exploiting this vulnerability can gain unauthorized access to sensitive wiki content, modify or delete critical documentation, manipulate user permissions, and potentially use the compromised system as a foothold for further attacks within the network. This risk is particularly severe in environments where wikis serve as collaborative platforms for sensitive business or technical documentation, as the vulnerability could lead to complete system compromise and data exposure.
Organizations using affected MoinMoin versions should prioritize immediate remediation through upgrading to version 1.6.3 or later, which contains the necessary patches to address the user form processing flaw. Additionally, security teams should implement network monitoring to detect potential exploitation attempts and consider temporary workarounds such as disabling user registration or implementing additional authentication layers. This vulnerability aligns with CWE-284, which describes improper access control issues, and maps to ATT&CK technique T1078 for valid accounts and privilege escalation. The remediation process should also include comprehensive security auditing of existing user accounts and permissions to ensure no unauthorized access has occurred prior to patching, as the vulnerability could have enabled persistent access to the system.