CVE-2012-2563 in Web Filtering
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in Bloxx Web Filtering before 5.0.14 allow (1) remote attackers to inject arbitrary web script or HTML via web traffic that is examined within the Bloxx Reports component, and allow (2) remote authenticated administrators to inject arbitrary web script or HTML via vectors involving administrative menu functions.
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Analysis
by VulDB Data Team • 08/09/2024
The vulnerability identified as CVE-2012-2563 represents a critical cross-site scripting flaw affecting Bloxx Web Filtering software versions prior to 5.0.14. This vulnerability manifests in two distinct attack vectors that collectively undermine the security posture of the web filtering solution. The first vector targets unauthenticated remote attackers who can exploit the flaw during the examination of web traffic within the Bloxx Reports component, while the second vector specifically targets authenticated administrators who can inject malicious scripts through administrative menu functions. Both attack paths leverage the fundamental weakness of inadequate input validation and output encoding within the application's web interface components.
The technical root cause of this vulnerability stems from insufficient sanitization of user-supplied input data within the Bloxx Reports component and administrative interfaces. When web traffic is processed and displayed within the reports functionality, the application fails to properly encode or filter malicious script content that may be embedded in the traffic data. Similarly, the administrative menu functions do not adequately validate or sanitize input parameters, allowing authenticated users with administrative privileges to inject arbitrary HTML and JavaScript code. This vulnerability directly maps to CWE-79 which defines Cross-Site Scripting as the failure to properly encode output, and CWE-352 which addresses Cross-Site Request Forgery issues that often accompany such flaws. The vulnerability's classification aligns with ATT&CK technique T1059.001 for Command and Scripting Interpreter and T1566.001 for Phishing, as attackers can leverage these flaws to execute malicious scripts in the context of victim browsers.
The operational impact of CVE-2012-2563 extends beyond simple data theft or defacement, as it enables sophisticated attack scenarios that can compromise entire network security infrastructures. Remote attackers can leverage the unauthenticated vector to inject malicious scripts that persistently execute in the browser context of users viewing the reports, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The authenticated administrator vector presents even greater risk as it allows privileged attackers to inject scripts that could escalate privileges, modify system configurations, or exfiltrate sensitive data from the filtering appliance. These vulnerabilities create persistent backdoors within the network security infrastructure, as the injected scripts can remain active indefinitely and target multiple users who access the affected reporting functionality.
Organizations implementing Bloxx Web Filtering solutions should immediately upgrade to version 5.0.14 or later to remediate this vulnerability. In the interim, network administrators should implement additional mitigations including strict input validation at network boundaries, web application firewalls configured to detect and block XSS patterns, and regular monitoring of the affected reporting components for suspicious activity. Security teams should also conduct comprehensive assessments of all administrative interfaces to ensure no similar vulnerabilities exist within the broader application ecosystem. The remediation process should include thorough testing of the updated software to verify that the XSS protections are properly implemented and that legitimate functionality remains intact. Organizations should also review their incident response procedures to ensure preparedness for potential exploitation of this vulnerability, as the nature of XSS attacks can enable persistent threats that may go undetected for extended periods.