CVE-2015-2020
📋 TL;DR
This vulnerability in MyScript SDK for Android allows attackers to execute arbitrary code by exploiting improper deserialization. Attackers can pass malicious pointers to native functions through a finalize method in a Serializable class. This affects Android applications using MyScript SDK versions before 1.3 for handwriting recognition.
💻 Affected Systems
- MyScript SDK for Android
📦 What is this software?
Myscript by Myscript
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with remote code execution, potentially allowing attackers to install malware, steal sensitive data, or gain persistent access to the device.
Likely Case
Application compromise leading to data theft, privilege escalation, or installation of malicious payloads within the affected application context.
If Mitigated
Limited impact if proper input validation and deserialization controls are implemented, potentially reduced to denial of service.
🎯 Exploit Status
Exploitation requires crafting malicious serialized objects that trigger the vulnerable finalize method. The research paper provides technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3 and later
Vendor Advisory: https://alephsecurity.com/vulns/aleph-2015006
Restart Required: Yes
Instructions:
1. Update MyScript SDK to version 1.3 or later. 2. Rebuild your Android application with the updated SDK. 3. Deploy the updated application to affected devices. 4. Ensure all devices receive the updated application.
🔧 Temporary Workarounds
Disable MyScript SDK functionality
androidTemporarily disable handwriting recognition features that use the vulnerable SDK
Implement input validation
androidAdd strict validation for all data passed to MyScript SDK functions
🧯 If You Can't Patch
- Isolate affected applications in sandboxed environments
- Implement network segmentation to limit attack surface
🔍 How to Verify
Check if Vulnerable:
Check your Android application's dependencies for MyScript SDK version. If version is below 1.3, you are vulnerable.Check Version:
grep -r "myscript" build.gradle or check AndroidManifest.xml for SDK versionVerify Fix Applied:
Verify that MyScript SDK version in your application is 1.3 or higher by checking build.gradle or dependencies manifest.📡 Detection & Monitoring
Log Indicators:
- Unexpected native crashes in MyScript-related processes
- Suspicious serialization/deserialization activity
Network Indicators:
- Unusual outbound connections from applications using MyScript SDK
SIEM Query:
source="android_logs" AND (process="myscript" OR message="*MyScript*") AND (severity="CRITICAL" OR message="*crash*")