CVE-2012-4379 in MediaWiki
Summary
by MITRE
MediaWiki before 1.18.5, and 1.19.x before 1.19.2 does not send a restrictive X-Frame-Options HTTP header, which allows remote attackers to conduct clickjacking attacks via an embedded API response in an IFRAME element.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 11/26/2019
The vulnerability identified as CVE-2012-4379 represents a critical security flaw in MediaWiki software versions prior to 1.18.5 and 1.19.x versions before 1.19.2. This issue stems from the absence of a restrictive X-Frame-Options HTTP header in the web server responses, creating a significant attack vector for malicious actors seeking to exploit clickjacking techniques. The vulnerability specifically affects web applications that rely on MediaWiki for content management and collaboration, making it particularly concerning for organizations that depend on these platforms for their digital infrastructure.
The technical flaw manifests through the missing X-Frame-Options header implementation, which is a crucial security mechanism designed to prevent a web page from being rendered within an iframe element in another domain. This header should be set to either DENY or SAMEORIGIN to prevent unauthorized embedding of web content. Without this protection, attackers can create malicious web pages that embed legitimate MediaWiki API responses within iframe elements, effectively creating a deceptive user interface that can trick users into performing unintended actions. The vulnerability directly aligns with CWE-1021, which categorizes improper restriction of rendering of information in a different security context, and represents a classic example of clickjacking or user interface redressing attacks.
The operational impact of this vulnerability extends beyond simple security concerns to encompass potential data compromise and user manipulation. Attackers can exploit this flaw to create convincing phishing interfaces that appear to be legitimate MediaWiki pages while actually executing malicious commands in the background. This could lead to unauthorized access to user accounts, data exfiltration, or the execution of administrative functions within the MediaWiki environment. The attack surface is particularly wide given that MediaWiki is widely deployed across various organizations, from small businesses to large enterprises, making this vulnerability attractive to threat actors seeking to maximize their impact. The vulnerability also maps to ATT&CK technique T1071.004, which covers web protocols and services, specifically targeting the exploitation of web application vulnerabilities through malicious web content embedding.
Organizations utilizing affected MediaWiki versions should immediately implement the recommended security patches to address this vulnerability. The fix involves adding the appropriate X-Frame-Options header to all web responses, with the value set to DENY to completely prevent frame embedding or SAMEORIGIN to allow embedding only from the same origin. Additionally, implementing Content Security Policy (CSP) headers with frame-ancestors directives provides an additional layer of protection against similar vulnerabilities. Security teams should conduct thorough assessments of their MediaWiki deployments to ensure all instances are updated and that proper security headers are consistently applied across the entire web application stack. Regular security monitoring and vulnerability scanning should be implemented to detect any potential exploitation attempts and to maintain ongoing protection against evolving threats targeting web application frameworks.