CVE-2012-5920 in Web Toolkit
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in Google Web Toolkit (GWT) 2.4 through 2.5 Final, as used in JBoss Operations Network (ON) 3.1.1 and possibly other products, allows remote attackers to inject arbitrary web script or HTML via unspecified vectors. NOTE: this issue exists because of an incomplete fix for CVE-2012-4563.
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Analysis
by VulDB Data Team • 12/20/2021
The vulnerability identified as CVE-2012-5920 represents a cross-site scripting flaw within Google Web Toolkit versions 2.4 through 2.5 Final, affecting JBoss Operations Network 3.1.1 and potentially other applications utilizing this framework. This security weakness stems from an insufficient remediation of a previous vulnerability, CVE-2012-4563, which demonstrates the complexity of addressing web application security issues where partial fixes may leave residual attack surfaces. The flaw enables remote attackers to execute malicious scripts within the context of affected applications, creating potential pathways for unauthorized data access, session hijacking, and user deception attacks. The vulnerability's presence in GWT components used by enterprise monitoring solutions like JBoss ON highlights the widespread impact such flaws can have across different software ecosystems.
Technical exploitation of this vulnerability occurs through unspecified vectors within the GWT framework's handling of user input and dynamic content generation. The incomplete fix for CVE-2012-4563 suggests that while developers addressed certain injection points, other pathways remained unpatched, allowing attackers to bypass the initial mitigations. This type of vulnerability falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities in web applications. The attack surface typically involves scenarios where user-supplied data is processed and rendered back to users without proper sanitization or encoding mechanisms. When GWT applications handle dynamic content generation, the framework's failure to adequately validate or escape input data creates opportunities for attackers to inject malicious JavaScript payloads that execute in the victim's browser context.
The operational impact of this vulnerability extends beyond simple script injection, as it can facilitate more sophisticated attacks including session theft, data exfiltration, and privilege escalation within affected applications. Attackers can craft malicious inputs that, when processed by the vulnerable GWT components, execute arbitrary code in users' browsers, potentially compromising entire user sessions and enabling further exploitation. The implications are particularly severe in enterprise monitoring environments like JBoss ON where administrators and users may have elevated privileges, making successful exploitation potentially devastating. The vulnerability's persistence across multiple versions of GWT and its integration into enterprise products demonstrates how security flaws can cascade through software supply chains, affecting organizations that may not directly control all components of their technology stack. Organizations using affected versions face significant risk of unauthorized access and data compromise.
Mitigation strategies for CVE-2012-5920 require immediate remediation through version updates to GWT 2.5.1 or later, which contain the complete fix for the XSS vulnerability. System administrators should prioritize patching affected JBoss ON installations and any other products utilizing vulnerable GWT versions. Additional defensive measures include implementing robust input validation and output encoding mechanisms, deploying web application firewalls, and conducting comprehensive security testing of applications using GWT frameworks. Organizations should also consider implementing content security policies to limit script execution and monitor for suspicious user inputs. The vulnerability's relationship to ATT&CK technique T1059.007 for command and script injection underscores the importance of comprehensive application security practices including regular security assessments, proper input sanitization, and maintaining up-to-date security patches across all software components. Given the nature of the flaw, organizations should also review their incident response procedures to ensure readiness for potential exploitation attempts.