CVE-2019-12416

Vulnerability

Overview

CVE-2019-12416 describes two injection attacks in the DeltaSpike windowhandler.js component. These vulnerabilities are only exploitable when a developer has explicitly selected the ClientSideWindowStrategy, which is not the default configuration [1]. The root cause appears to be insufficient sanitization of input that is processed by the window handler.

Exploitation

An attacker can exploit these injection flaws if the application uses the ClientSideWindowStrategy. The exact attack vector is not detailed, but likely involves crafting malicious input that is then processed by windowhandler.js. No authentication or special network position is mentioned, suggesting it may be exploited remotely without authentication [1].

Impact

Successful exploitation could allow an attacker to inject arbitrary code or script, potentially leading to cross-site scripting (XSS) or other client-side attacks. This could result in data theft, session hijacking, or other malicious actions within the context of the vulnerable application.

Mitigation

As of the publication date (2020-03-19), the default strategy is not vulnerable. Developers should avoid using the ClientSideWindowStrategy unless necessary and apply any available patches from the DeltaSpike project. No workaround is mentioned in the official description [1].