CVE-2023-2507
📋 TL;DR
This vulnerability in CleverTap Cordova Plugin allows remote attackers to execute arbitrary JavaScript code in applications that open specially crafted deeplinks. Attackers can exploit improper validation of deeplink data to run malicious scripts in the context of affected mobile applications. All applications using vulnerable versions of the CleverTap Cordova Plugin are affected.
💻 Affected Systems
- CleverTap Cordova Plugin
📦 What is this software?
Clevertap by Clevertap
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of mobile application functionality, data theft, session hijacking, and potential device takeover through chained exploits.
Likely Case
Malicious JavaScript execution leading to data exfiltration, phishing attacks, or unauthorized actions within the application.
If Mitigated
Limited impact with proper input validation and deeplink sanitization in place.
🎯 Exploit Status
Exploitation requires user interaction to open malicious deeplinks but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.0
Vendor Advisory: https://github.com/CleverTap/clevertap-cordova/releases/tag/2.7.0
Restart Required: Yes
Instructions:
1. Update CleverTap Cordova Plugin to version 2.7.0 or later. 2. Rebuild and redeploy your mobile application. 3. Test deeplink functionality after update.
🔧 Temporary Workarounds
Disable deeplink handling
allTemporarily disable or restrict deeplink processing in the application.
Implement custom deeplink validation
allAdd additional validation layer for all incoming deeplinks before processing.
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to restrict JavaScript execution.
- Monitor for suspicious deeplink patterns and block malicious URLs at network perimeter.
🔍 How to Verify
Check if Vulnerable:
Check package.json or plugin configuration for CleverTap Cordova Plugin version 2.6.2 or earlier.Check Version:
cordova plugin list | grep clevertap-cordovaVerify Fix Applied:
Confirm CleverTap Cordova Plugin version is 2.7.0 or later in your application dependencies.📡 Detection & Monitoring
Log Indicators:
- Unusual deeplink patterns in application logs
- JavaScript execution errors from unexpected sources
Network Indicators:
- Requests to known malicious domains from mobile applications
- Suspicious URL patterns in deeplink traffic
SIEM Query:
source="mobile_app_logs" AND (deeplink="*javascript:*" OR deeplink="*data:*")