Overview
CVE-2025-63435 identifies a critical security vulnerability in the Xtooltech Xtool AnyScan Android Application version 4.40.40. The vulnerability stems from a missing authentication mechanism for the server-side endpoint responsible for delivering application update packages. This lack of authentication allows any unauthenticated remote attacker to download official update packages for the application. This poses a significant security risk as it could be leveraged to deliver malicious updates to unsuspecting users.
Technical Details
The Xtool AnyScan application, used for vehicle diagnostics and related functions, retrieves updates from a server-side endpoint. Due to the absence of authentication requirements on this endpoint, anyone can request and receive these update packages. An attacker could potentially analyze these packages, identify vulnerabilities, or even craft malicious update packages designed to compromise the application and the device it is installed on. The vulnerability resides in the way the application interacts with the update server, failing to verify the source or integrity of the update before installation.
CVSS Analysis
Currently, the CVE record indicates that the CVSS score and severity are not available (N/A). However, the potential impact of this vulnerability suggests that it is likely to receive a high CVSS score upon assessment. The ability to deliver malicious updates opens the door to remote code execution and device compromise.
Possible Impact
The exploitation of CVE-2025-63435 could have severe consequences, including:
- Remote Code Execution (RCE): Malicious updates could be crafted to execute arbitrary code on the user’s Android device, granting the attacker complete control.
- Data Theft: Compromised applications can steal sensitive data stored on the device, including credentials, personal information, and vehicle diagnostic data.
- Application Impersonation: An attacker could distribute a modified version of the application, potentially impersonating the legitimate Xtool AnyScan application and tricking users into performing malicious actions.
- Vehicle Control (Potential): Given the application’s interaction with vehicle systems, a successful attack could, theoretically, lead to unauthorized access or manipulation of vehicle functions. While this is a more complex scenario, it represents a potential worst-case outcome.
Mitigation or Patch Steps
The primary mitigation strategy is for Xtooltech to release a patched version of the AnyScan application that implements proper authentication and integrity checks for update packages. Specifically, the following steps should be taken:
- Implement Authentication: Require authentication for accessing the update server endpoint. This could involve API keys, user credentials, or other secure authentication methods.
- Implement Integrity Checks: Use digital signatures to ensure the authenticity and integrity of update packages. The application should verify the signature before installing any update.
- Secure Communication: Ensure all communication between the application and the update server is encrypted using HTTPS.
- User Awareness: Educate users about the risks of installing updates from untrusted sources and encourage them to only install updates through the official Google Play Store.
Users should update to the latest version of the Xtool AnyScan application as soon as a patch is released.
References
GitHub: CVE-2025-63435 Reference
NowSecure Blog: Remote Code Execution Discovered in Xtool AnyScan App
Published: 2025-11-24T17:16:08.283
