CVE-2019-12416 in we got reports for
Summary
by MITRE • 01/25/2023
we got reports for 2 injection attacks against the DeltaSpike windowhandler.js. This is only active if a developer selected the ClientSideWindowStrategy which is not the default.
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Analysis
by VulDB Data Team • 05/12/2025
CVE-2019-12416 represents a critical injection vulnerability within the DeltaSpike windowhandler.js component that affects applications utilizing the ClientSideWindowStrategy implementation. This vulnerability arises from insufficient input validation and sanitization mechanisms within the window management functionality, creating potential entry points for malicious actors to inject arbitrary code or commands. The flaw specifically manifests when developers explicitly configure their applications to use the ClientSideWindowStrategy, which operates as a non-default setting and therefore may not receive the same level of security scrutiny as core components.
The technical exploitation of this vulnerability stems from improper handling of user-supplied data within the window handler's JavaScript implementation. Attackers can leverage this weakness to inject malicious scripts or commands that execute within the context of the victim's browser session. This injection occurs during the window management operations where the system fails to properly sanitize or escape input parameters before processing them within the client-side window handling logic. The vulnerability directly maps to CWE-94, which encompasses "Improper Control of Generation of Code" and CWE-79, "Cross-Site Scripting", as the injection can result in arbitrary code execution and cross-site scripting attacks. The attack vector operates through the manipulation of window state parameters, potentially allowing adversaries to redirect users to malicious sites, steal session tokens, or execute unauthorized operations within the application context.
The operational impact of CVE-2019-12416 extends beyond simple script injection, as it can enable sophisticated attack chains that compromise the entire application session. When the ClientSideWindowStrategy is active, the vulnerability creates a persistent threat vector that can be exploited across multiple user sessions and potentially affect other applications sharing the same domain. The attack surface becomes particularly dangerous when considering that the vulnerability only requires the specific configuration choice to be enabled, making it a latent threat that may remain undetected for extended periods. This weakness can facilitate session hijacking, privilege escalation, and data exfiltration attacks, particularly in environments where applications handle sensitive user information or business-critical data. The vulnerability's impact is amplified by its potential to be leveraged as a stepping stone for more comprehensive attacks, aligning with ATT&CK technique T1059.007 for "Command and Scripting Interpreter: JavaScript" and T1566.001 for "Phishing: Spearphishing Attachment".
Organizations should implement immediate mitigations including disabling the ClientSideWindowStrategy when not explicitly required, implementing comprehensive input validation and sanitization for all window management parameters, and conducting thorough code reviews of the window handler implementation. The recommended approach involves enforcing strict content security policies, implementing proper output encoding mechanisms, and ensuring that all user-supplied data undergoes rigorous validation before being processed within the window management framework. Security teams should also consider deploying web application firewalls to monitor and block suspicious injection patterns, while maintaining detailed logging of window management operations for threat detection purposes. The vulnerability serves as a reminder of the critical importance of securing all application components, regardless of their default activation status, and highlights the need for comprehensive security testing throughout the software development lifecycle to prevent such configuration-dependent vulnerabilities from being exploited in production environments.