CVE-2012-5500 in Plone
Summary
by MITRE
The batch id change script (renameObjectsByPaths.py) in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to change the titles of content items by leveraging a valid CSRF token in a crafted request.
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Analysis
by VulDB Data Team • 04/03/2022
The vulnerability identified as CVE-2012-5500 affects Plone content management systems version 4.2.2 and earlier, as well as version 4.3 beta 1 and earlier. This security flaw resides within the batch id change script known as renameObjectsByPaths.py which is designed to facilitate bulk renaming operations within the Plone environment. The vulnerability represents a significant security concern as it allows remote attackers to manipulate content items through unauthorized title modifications, potentially leading to data integrity compromise and content manipulation.
The technical exploitation of this vulnerability relies on the improper validation of CSRF (Cross-Site Request Forgery) tokens within the batch processing functionality. When a valid CSRF token is present in a crafted HTTP request, attackers can leverage this token to execute unauthorized batch operations that modify content item titles. The flaw essentially bypasses the normal access control mechanisms that should prevent unauthorized modifications to content items. The renameObjectsByPaths.py script fails to properly validate whether the user initiating the batch operation has the necessary permissions to modify the targeted content items, despite having access to a valid CSRF token. This weakness creates a path for attackers to manipulate content without proper authentication or authorization, as the system trusts the presence of a valid token without sufficient verification of the user's rights to perform the requested operations.
The operational impact of CVE-2012-5500 extends beyond simple title modifications to encompass broader content integrity threats within Plone environments. Attackers can potentially manipulate content to mislead users, disrupt information systems, or create confusion within the content management structure. The vulnerability particularly affects organizations relying on Plone for content management, as it enables unauthorized modification of publicly accessible or sensitive content items. The implications are especially severe in environments where content integrity is critical, such as news portals, corporate websites, or government information systems. Additionally, this vulnerability can be exploited in conjunction with other attacks to create more sophisticated compromise scenarios, potentially leading to full system compromise through content manipulation that may be used for phishing or social engineering attacks.
Organizations should implement immediate mitigations including upgrading to Plone versions 4.2.3 or later, which contain patches addressing this vulnerability. The fix typically involves strengthening the CSRF token validation process and implementing proper access control checks for batch operations. Security administrators should also review and audit existing batch operations to ensure that proper authorization checks are in place. The vulnerability aligns with CWE-352, which describes Cross-Site Request Forgery, and maps to ATT&CK technique T1078.004 which covers Valid Accounts - Cloud Accounts, as unauthorized access through CSRF tokens represents a form of account compromise. Organizations should also consider implementing additional security controls such as request origin validation, enhanced logging of batch operations, and monitoring for unusual content modification patterns. The mitigation strategy should include comprehensive testing of patched systems to ensure that the CSRF validation is properly enforced without disrupting legitimate administrative functions. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in related systems and applications that may be vulnerable to similar CSRF-based attacks.