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The CVE-2025-63432 vulnerability stems from the Xtool AnyScan Android application’s failure to implement proper SSL certificate validation during TLS connections to its update server. In versions 4.40.40 and prior, the app does not verify the authenticity, expiration, or hostname matching of the server’s TLS certificate. This omission allows an attacker on the same network to perform a Man-in-the-Middle (MITM) attack by intercepting communication between the app and the server. The attacker can use techniques like ARP spoofing or a rogue access point to redirect traffic. Since the app accepts any certificate, including self-signed or forged ones, the attacker can decrypt the TLS-encrypted traffic. This decryption exposes sensitive data transmitted during updates or configuration exchanges. Furthermore, the attacker can modify the traffic, such as altering update packages to inject malicious code. This modified code can be delivered to the app as a legitimate update, which the app then executes. The execution of malicious code leads to Remote Code Execution (RCE), granting the attacker control over the device. The vulnerability arises from insecure coding practices, possibly where certificate validation was disabled for testing and not re-enabled. The lack of validation renders the encryption ineffective, as authentication is compromised. This flaw is exploitable without physical access, requiring only network proximity, making public Wi-Fi hotspots particularly risky. The update mechanism, a critical trust point, becomes a vector for severe attacks, undermining overall device security.
Platform: Xtool AnyScan App
Version: 4.40.40 prior
Vulnerability: Missing SSL Validation
Severity: Critical
Date: 11/24/2025
Prediction: Expected Q4 2025
What Undercode Say:
Decompile APK for analysis
apktool d anyscan.apk
Search for TrustManager code
grep -r “TrustManager” decompiled/
Set up MITM redirection
iptables -t nat -A PREROUTING -i wlan0 -p tcp –dport 443 -j REDIRECT –to-port 8080
Intercept traffic with mitmproxy
mitmproxy –mode transparent
Hook SSL functions with Frida
frida -U -f com.xtool.anyscan -l ssl_pinning_bypass.js
Capture network packets
tcpdump -i any -s 0 -w capture.pcap
How Exploit:
Establish rogue Wi-Fi access point. Use ARP spoofing to redirect victim traffic. Intercept HTTPS requests with mitmproxy. Present self-signed certificate to app. Decrypt and modify update traffic. Inject malicious payload for RCE.
Protection from this CVE
Update app version. Implement certificate pinning. Enable strict SSL validation. Use trusted networks only. Employ secure coding practices.
Impact:
Remote Code Execution. Data interception theft. Malware installation compromise. Device integrity loss. Full system control.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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