CVE-2023-42471

Comprehensive Technical Analysis of CVE-2023-42471

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-42471 CVSS Score: 9.8

The vulnerability in the wave.ai.browser application through version 1.0.35 for Android allows a remote attacker to execute arbitrary JavaScript code via a crafted intent. This is due to an improperly secured WebView component in the wave.ai.browser.ui.splash.SplashScreen activity, which does not adequately validate or sanitize the URI or any extra data passed in the intent by a third-party application.

Severity Evaluation:

• CVSS Score: 9.8 (Critical)
• Impact: High
• Exploitability: High

The high CVSS score indicates a critical vulnerability that can be easily exploited with severe consequences, including remote code execution and potential data breaches.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

1. Remote Attack: An attacker can craft a malicious intent that includes a URI with embedded JavaScript code.
2. Third-Party Applications: Malicious third-party applications can exploit this vulnerability by sending crafted intents to the SplashScreen activity.

Exploitation Methods:

1. Crafted Intent: The attacker creates an intent with a malicious URI that includes JavaScript code.
2. WebView Component: The WebView component in the SplashScreen activity loads the malicious URI without proper validation or sanitization, leading to the execution of the embedded JavaScript code.

3. Affected Systems and Software Versions

Affected Systems:

• Android devices running the wave.ai.browser application.

Affected Software Versions:

• wave.ai.browser versions through 1.0.35.

4. Recommended Mitigation Strategies

1. Update Software: Ensure that all users update to a patched version of the wave.ai.browser application that addresses this vulnerability.
2. Input Validation: Implement robust input validation and sanitization for all intents and URIs processed by the WebView component.
3. Permissions Management: Restrict the export of activities that handle sensitive data or operations to trusted applications only.
4. Security Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
5. User Education: Educate users about the risks of installing third-party applications from untrusted sources.

5. Impact on Cybersecurity Landscape

This vulnerability highlights the importance of secure coding practices, especially in mobile applications that handle web content. The ease of exploitation and the potential for remote code execution underscore the need for rigorous input validation and sanitization. The cybersecurity landscape is increasingly focused on mobile security, and incidents like this reinforce the necessity for continuous monitoring and timely updates.

6. Technical Details for Security Professionals

Technical Analysis:

• Manifest Entry: The wave.ai.browser.ui.splash.SplashScreen activity is exported in the application's manifest, allowing it to be accessed by third-party applications.
• WebView Component: The WebView component in the SplashScreen activity does not properly validate or sanitize the URI or extra data passed in the intent, leading to the execution of arbitrary JavaScript code.

Exploit Details:

• Crafted Intent: An attacker can create an intent with a malicious URI, such as intent://#Intent;scheme=http;action=android.intent.action.VIEW;S.url=javascript:alert('XSS');end.
• WebView Loading: The WebView component loads the malicious URI, executing the embedded JavaScript code without proper validation.

References:

• Third Party Advisory
• Exploit Details
• Proof of Concept

Conclusion: CVE-2023-42471 is a critical vulnerability that underscores the need for secure coding practices and robust input validation in mobile applications. Organizations and developers should prioritize updating affected software and implementing comprehensive security measures to mitigate similar risks in the future.