CVE-2012-0046 in MediaWiki
Summary
by MITRE
mediawiki allows deleted text to be exposed
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 01/29/2024
The vulnerability identified as CVE-2012-0046 affects MediaWiki installations and represents a critical information disclosure flaw that allows deleted content to remain accessible to unauthorized users. This vulnerability specifically targets the content management system's handling of deleted pages and their associated text, creating a persistent security risk where sensitive information can be recovered through various exploitation vectors. The issue stems from inadequate cleanup processes within the MediaWiki software that fail to properly remove all traces of deleted content from the system's database and cache mechanisms.
Technical exploitation of this vulnerability occurs when administrators or malicious actors access deleted pages through various URL patterns or database queries that bypass normal access controls. The flaw allows for the retrieval of text content that should have been permanently removed from the system, potentially exposing confidential information, private communications, or sensitive data that was marked for deletion. This behavior violates fundamental security principles of data sanitization and access control, as the system fails to properly enforce its own deletion policies. The vulnerability operates at the application layer and can be classified under CWE-200, which deals with information exposure, while also relating to CWE-502, concerning deserialization of untrusted data, if the deletion process involves serialized content manipulation.
The operational impact of CVE-2012-0046 extends beyond simple information disclosure, as it can lead to significant data breaches and compliance violations for organizations using MediaWiki platforms. The exposure of deleted text can compromise user privacy, business confidentiality, and regulatory compliance requirements, particularly in environments governed by data protection regulations such as GDPR or HIPAA. Attackers can leverage this vulnerability to reconstruct deleted content, potentially recovering sensitive documents, personal information, or proprietary data that was intended to be permanently removed from the system. The vulnerability also affects the integrity of the content management system's audit trail, as deleted content can be recovered and potentially modified without proper authorization.
Mitigation strategies for this vulnerability require immediate implementation of security patches provided by the MediaWiki development team, along with comprehensive database cleanup procedures to remove existing traces of deleted content. Organizations should implement additional access controls and monitoring mechanisms to detect unauthorized access attempts to deleted content, while also establishing proper data retention and deletion policies that align with security best practices. The remediation process should include thorough database audits to identify and remove any existing compromised data, alongside configuration reviews to ensure that deletion processes properly sanitize all content from memory, cache, and storage systems. Security teams must also consider implementing network monitoring to detect unusual access patterns that might indicate exploitation attempts, while ensuring that all system components are regularly updated to prevent similar vulnerabilities from emerging in the future.