CVE-2012-4483 in commons
Summary
by MITRE
The commons_discussion_views_default_views function in modules/features/commons_discussion/commons_discussion.views_default.inc in the Drupal Commons module 6.x-2.x before 6.x-2.8 for Drupal does not properly enforce intended node access restrictions, which might allow remote attackers to obtain sensitive information via the recent comments listing.
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Analysis
by VulDB Data Team • 02/23/2019
The vulnerability identified as CVE-2012-4483 affects the Drupal Commons module version 6.x-2.x prior to 6.x-2.8, presenting a significant information disclosure risk within the Drupal content management system. This flaw exists within the commons_discussion_views_default_views function that handles the display of recent comments through the module's default views implementation. The vulnerability stems from improper enforcement of node access restrictions that should normally prevent unauthorized users from viewing comments associated with nodes they do not have permission to access. Attackers can exploit this weakness to bypass intended access controls and obtain sensitive information through the recent comments listing functionality.
The technical nature of this vulnerability aligns with CWE-284, which addresses improper access control mechanisms, and represents a classic case of insufficient authorization checks within web application components. The flaw specifically manifests when the Drupal Commons module processes view displays for recent comments, failing to validate whether the authenticated user possesses appropriate permissions to view the underlying nodes associated with those comments. This allows remote attackers to construct requests that retrieve comment data from nodes they should not be able to access, potentially exposing confidential discussions, private communications, or sensitive content that should remain restricted to specific user roles or groups.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable attackers to gather intelligence about site content, user activities, and potentially sensitive business or personal information shared through discussion forums. The vulnerability affects Drupal 6.x installations using the Commons module, particularly impacting sites that rely on the module's discussion features for community engagement, internal communications, or collaborative workspaces. Given that the Commons module is designed for social networking and community building within Drupal, the exposure of unauthorized comment access can compromise the integrity of user discussions and potentially reveal information about user relationships, project details, or organizational activities that should remain private.
Mitigation strategies for this vulnerability require immediate patching of the Drupal Commons module to version 6.x-2.8 or later, which contains the necessary fixes to properly enforce node access restrictions. Organizations should also implement comprehensive security monitoring to detect unauthorized access attempts and review their existing access control configurations to ensure proper role-based permissions are enforced. The remediation process should include thorough testing of the patched module to verify that comment access controls function correctly and that legitimate users can still access appropriate content while unauthorized users are properly restricted. Additionally, administrators should consider implementing network-level access controls and logging mechanisms to monitor for suspicious activities related to comment access and to maintain audit trails of user interactions with discussion content. This vulnerability demonstrates the critical importance of proper access control implementation in web applications and highlights the potential consequences of inadequate authorization checks in content management systems.