CVE-2008-1318 in MediaWiki
Summary
by MITRE
Unspecified vulnerability in MediaWiki 1.11 before 1.11.2 allows remote attackers to obtain sensitive "cross-site" information via the callback parameter in an API call for JavaScript Object Notation (JSON) formatted results.
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Analysis
by VulDB Data Team • 08/06/2019
The vulnerability identified as CVE-2008-1318 represents a critical security flaw in MediaWiki versions prior to 1.11.2, specifically targeting the application's handling of cross-site information disclosure through API endpoints. This issue arises from insufficient validation of the callback parameter within JSON formatted API responses, creating a potential vector for remote attackers to exploit. The vulnerability exists within the core web application framework that powers numerous wikis including Wikipedia, making it particularly concerning for organizations relying on MediaWiki for content management and collaboration.
The technical flaw manifests when MediaWiki processes API requests with JSON formatted output and fails to properly sanitize or validate the callback parameter. This parameter is typically used for JSONP (JSON with Padding) functionality to enable cross-domain data retrieval in web applications. When attackers manipulate this parameter, they can potentially extract sensitive information from the application's API responses through cross-site scripting techniques. The vulnerability falls under CWE-200 - Information Exposure and specifically relates to improper input validation mechanisms that should prevent malicious callback values from being processed. The flaw enables attackers to craft malicious API requests that could reveal internal system information, user data, or other sensitive cross-site information that would normally be protected by the application's security model.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates opportunities for more sophisticated attacks within the broader threat landscape. Attackers could potentially leverage this vulnerability to gather intelligence about the MediaWiki installation, including version information, configuration details, and potentially user session data. The vulnerability aligns with ATT&CK technique T1566 - Phishing, as it could be used in conjunction with social engineering campaigns to gather information for more targeted attacks. Organizations running affected MediaWiki versions face risks including unauthorized data access, potential credential exposure, and information gathering that could lead to further exploitation attempts. The cross-site nature of the vulnerability means that it could be exploited from different domains, making detection and mitigation more complex for network defenders.
Mitigation strategies for CVE-2008-1318 should prioritize immediate patching of MediaWiki installations to version 1.11.2 or later, which includes proper validation and sanitization of the callback parameter. Organizations should implement strict input validation controls for all API endpoints, particularly those handling JSONP functionality, ensuring that callback parameters are properly escaped and validated against known safe patterns. Network defenders should monitor API traffic for suspicious callback parameter usage and implement web application firewalls to detect and block malformed API requests. Additionally, organizations should consider disabling JSONP functionality if not required, as this eliminates the attack surface entirely. Regular security audits of web applications should include verification of parameter handling in API endpoints, and security teams should maintain awareness of similar vulnerabilities in other web frameworks that may exhibit similar cross-site information disclosure patterns. The remediation process should also include reviewing and updating security configurations to ensure that all API endpoints properly validate and sanitize all user-supplied input parameters.