Adobe Flex 3 DOM-based XSS vulnerability
Description
Adobe Flex 3 contains a DOM-based cross-site scripting (XSS) vulnerability in the History Management feature. This vulnerability allows attackers to inject malicious scripts into web applications built with Flex 3 that have History Management enabled. The flaw exists in client-side JavaScript code that processes user-controlled input without proper sanitization, enabling script execution in the context of the vulnerable application.
Remediation
Organizations using Adobe Flex 3 should take the following remediation steps:<br/><br/>1. <strong>Update the Flex SDK:</strong> Download and install the Flex 3.0.2 SDK update from Adobe's official website, which addresses this vulnerability<br/><br/>2. <strong>Rebuild affected applications:</strong> Recompile all Flex applications that use the History Management feature with the updated SDK<br/><br/>3. <strong>Redeploy applications:</strong> Replace all deployed instances of affected applications with the recompiled versions<br/><br/>4. <strong>Verify the fix:</strong> Test updated applications to ensure History Management functionality works correctly and the vulnerability is resolved<br/><br/>5. <strong>Update development environments:</strong> If using Flex Builder 3, update all development instances to use the patched SDK to prevent introduction of the vulnerability in future builds<br/><br/>For applications where History Management is not required, consider disabling this feature as an additional security measure.