Overview
CVE-2025-63433 identifies a critical security vulnerability affecting the Xtooltech Xtool AnyScan Android Application, specifically versions 4.40.40 and prior. This flaw stems from the use of a hardcoded cryptographic key and Initialization Vector (IV) for decrypting update metadata. This practice introduces a significant risk, allowing attackers to potentially inject malicious code into the update process, potentially compromising connected vehicles.
Technical Details
The Xtool AnyScan application utilizes a hardcoded key and IV to decrypt the update manifest, which dictates the source and integrity of application updates. The key is embedded directly within the application’s code as a static value. This means that an attacker who can decompile or reverse engineer the application can readily extract the key. Once the key is obtained, an attacker capable of intercepting network traffic during an update can decrypt the update manifest, modify it to point to a malicious update package hosted on an attacker-controlled server, re-encrypt the modified manifest using the hardcoded key, and then deliver this compromised manifest to the application. The application, unaware of the tampering, will then download and install the malicious update.
CVSS Analysis
Currently, both the CVSS score and severity are listed as N/A. However, given the potential for remote code execution and the ability to compromise vehicle systems, this vulnerability likely warrants a high severity rating and a corresponding high CVSS score once evaluated. The lack of these details at this time does not diminish the potential risk.
Possible Impact
The exploitation of CVE-2025-63433 can have severe consequences:
- Remote Code Execution (RCE): Successful exploitation allows attackers to execute arbitrary code on devices running the Xtool AnyScan application.
- Vehicle Compromise: Given the application’s role in vehicle diagnostics and configuration, attackers could potentially gain unauthorized access to vehicle systems, leading to theft, manipulation of vehicle functions, or even safety-critical control issues.
- Data Theft: The compromised application could be used to steal sensitive data from the device or connected vehicle systems.
- Botnet Inclusion: Infected devices could be recruited into a botnet, used for malicious activities like DDoS attacks.
Mitigation and Patch Steps
The primary mitigation strategy is to update the Xtool AnyScan application to a patched version that addresses this vulnerability. Users should take the following steps:
- Update Immediately: If an updated version of the Xtool AnyScan application is available, install it immediately.
- Monitor Network Traffic: Be vigilant for unusual network activity originating from the application.
- Exercise Caution: Avoid using the application on untrusted networks.
- Contact Xtooltech Support: If you suspect your device or vehicle has been compromised, contact Xtooltech support for assistance.
For Xtooltech, the following remediation steps are crucial:
- Remove Hardcoded Key: Replace the hardcoded cryptographic key and IV with a secure key management system. Consider using key derivation functions (KDFs) or hardware security modules (HSMs) to protect cryptographic keys.
- Implement Code Signing: Digitally sign update packages to ensure their authenticity and integrity.
- Secure Communication Channels: Use HTTPS with certificate pinning to prevent man-in-the-middle attacks.
- Conduct Security Audits: Perform regular security audits and penetration testing to identify and address vulnerabilities proactively.
