CVE-2014-7852 in JBoss Portal
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in JBoss RichFaces, as used in JBoss Portal 6.1.1, allows remote attackers to inject arbitrary web script or HTML via crafted URL, which is not properly handled in a CSS file.
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Analysis
by VulDB Data Team • 07/07/2017
The CVE-2014-7852 vulnerability represents a critical cross-site scripting flaw within JBoss RichFaces component library, specifically affecting JBoss Portal 6.1.1 installations. This vulnerability stems from inadequate input validation and sanitization mechanisms within the richfaces framework, which processes user-supplied data through URL parameters that are subsequently reflected in CSS file content. The flaw operates by allowing malicious actors to inject arbitrary JavaScript code or HTML content through carefully crafted URLs that bypass normal security controls. When the affected portal processes these malicious inputs, the crafted content gets embedded into CSS files without proper encoding or sanitization, creating an avenue for attackers to execute malicious scripts in the context of other users' browsers. The vulnerability is particularly concerning because it leverages the CSS file processing mechanism, which typically handles benign styling information but becomes a vector for code execution when improperly sanitized.
The technical exploitation of this vulnerability involves constructing malicious URLs that contain script payloads, which are then processed by the JBoss RichFaces component when generating CSS output. The vulnerability is classified under CWE-79 as a classic cross-site scripting weakness, where the application fails to properly validate or sanitize user-supplied data before incorporating it into dynamically generated content. Attackers can leverage this flaw to execute persistent XSS attacks by embedding malicious scripts that will execute whenever legitimate users view pages containing the injected content. The attack typically requires no authentication and can be delivered through social engineering techniques, phishing emails, or by directly accessing the vulnerable URLs. The impact extends beyond simple script execution to include potential session hijacking, credential theft, and full browser compromise when combined with other attack vectors. This vulnerability aligns with ATT&CK technique T1566.001 for initial access through spearphishing attachments and T1059.007 for command and control through scripting languages, demonstrating how XSS vulnerabilities can serve as entry points for more sophisticated attacks.
The operational impact of CVE-2014-7852 extends beyond immediate code execution capabilities to encompass significant risks for enterprise security infrastructure. Organizations running JBoss Portal 6.1.1 with RichFaces components face potential data breaches, unauthorized access to sensitive information, and complete browser compromise for authenticated users. The vulnerability's persistence stems from the fact that malicious scripts can remain active in the CSS files until the affected components are properly updated or patched. Security teams must consider the cascading effects of such vulnerabilities, as compromised user sessions can lead to privilege escalation and lateral movement within network environments. The vulnerability affects web applications that rely on richfaces for dynamic content generation and user interface components, making it particularly dangerous for portals, content management systems, and enterprise web applications that handle sensitive user data. Organizations may experience regulatory compliance issues, reputational damage, and financial losses due to potential data exposure and system compromise resulting from successful exploitation of this vulnerability.
Mitigation strategies for CVE-2014-7852 should prioritize immediate patching of affected JBoss Portal installations with the vendor-provided security updates. Organizations must implement comprehensive input validation and output encoding mechanisms to prevent user-supplied data from being improperly processed in CSS contexts. The implementation of Content Security Policy headers can provide additional protection against script execution, while web application firewalls should be configured to detect and block suspicious URL patterns. Security teams should conduct thorough vulnerability assessments to identify all instances of affected richfaces components and ensure proper sanitization of all user inputs. Regular security monitoring and log analysis should be implemented to detect potential exploitation attempts, while user education programs can help prevent social engineering attacks that might leverage this vulnerability. Organizations should also consider implementing automated patch management systems to ensure timely application of security updates and maintain detailed inventory records of all installed components to quickly identify vulnerable systems. The remediation process must include thorough testing of patched systems to ensure that security updates do not introduce regressions in application functionality while maintaining the integrity of the portal's user experience and business operations.