CVE-2012-3343 in Web Filtering
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in Microdasys before 3.5.1-B708, as used in Bloxx Web Filtering before 5.0.14 and other products, allows remote attackers to hijack the authentication of arbitrary users for requests that trigger error pages containing XSS sequences, a different vulnerability than CVE-2012-2564.
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Analysis
by VulDB Data Team • 08/11/2024
The CVE-2012-3343 vulnerability represents a critical cross-site request forgery flaw that affected Microdasys versions prior to 3.5.1-B708 and subsequently impacted Bloxx Web Filtering products before version 5.0.14. This vulnerability operates through a sophisticated attack vector that leverages the intersection of CSRF and XSS weaknesses, creating a particularly dangerous exploitation scenario for malicious actors targeting web filtering systems. The flaw enables remote attackers to manipulate authenticated sessions by tricking users into executing unintended actions through carefully crafted requests that exploit the system's error handling mechanisms.
The technical implementation of this vulnerability stems from inadequate CSRF protection mechanisms within the affected software components. When the system processes error pages that contain XSS sequences, the CSRF protection fails to properly validate the authenticity of requests originating from authenticated users. This creates a scenario where an attacker can craft malicious requests that appear legitimate to the system but are actually designed to exploit the error handling pathways. The vulnerability specifically targets the authentication token validation process, allowing attackers to bypass session management controls through carefully constructed cross-site requests that leverage the existing XSS payloads in error responses.
The operational impact of CVE-2012-3343 extends beyond simple unauthorized access to encompass potential complete system compromise and data exfiltration capabilities. Attackers can hijack user sessions to perform administrative actions, modify filtering rules, bypass security controls, or access restricted content within the web filtering environment. This vulnerability particularly affects organizations relying on web filtering solutions for network security, as successful exploitation could allow attackers to undermine the entire security posture of the filtering infrastructure. The attack scenario becomes more dangerous when considering that the vulnerability operates through error page handling, which means it could be triggered by legitimate user activities or automated scanning tools, making detection and prevention more challenging.
The vulnerability aligns with CWE-352, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. Additionally, this flaw demonstrates characteristics consistent with ATT&CK technique T1566.002 for the use of web services and T1190 for exploitation of vulnerabilities in web applications. The combination of CSRF and XSS elements in this vulnerability creates a complex attack surface that requires comprehensive security measures beyond traditional CSRF protection mechanisms. Organizations implementing web filtering solutions must understand that this vulnerability can be exploited through seemingly benign error conditions, making it essential to validate all incoming requests regardless of their apparent source or context.
Mitigation strategies for CVE-2012-3343 require immediate patching of affected systems to version 3.5.1-B708 or later for Microdasys components and 5.0.14 or later for Bloxx Web Filtering. Organizations should implement robust CSRF token validation mechanisms that operate independently of XSS payloads and error handling paths. Network administrators should consider implementing additional security controls such as Content Security Policy headers, proper input validation, and comprehensive monitoring of authentication-related activities. The vulnerability also highlights the importance of secure error handling practices, where error messages should not contain executable code or sensitive information that could be exploited by attackers. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in related web applications and filtering systems that may present comparable attack vectors.