CVE-2021-25648
📋 TL;DR
This vulnerability allows attackers to gain administrative access and premium features in the 'Testes de Codigo' mobile application by modifying boolean values stored on the device. Attackers can tamper with 'isAdmin' and 'isPremium' parameters to escalate privileges. Users of versions 11.4 and prior are affected.
💻 Affected Systems
- Testes de Codigo mobile application
📦 What is this software?
Testes De Codigo by Testes Codigo
Testes De Codigo by Testes Codigo
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of application functionality, unauthorized access to premium features, potential data theft or manipulation, and administrative control over the application.
Likely Case
Unauthorized users gaining free access to premium features and administrative capabilities they shouldn't have, leading to revenue loss and potential data exposure.
If Mitigated
Limited impact with proper server-side validation and secure storage mechanisms preventing local parameter tampering.
🎯 Exploit Status
Exploitation requires physical access to device or ability to modify local storage. Simple parameter modification attack.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
1. Update to version after 11.4 if available
2. If no update available, consider discontinuing use of vulnerable versions
3. Implement server-side validation for all privilege checks
🔧 Temporary Workarounds
Implement Server-Side Validation
allMove privilege validation from client-side storage to server-side authentication
Secure Local Storage
allEncrypt or sign sensitive parameters stored locally to prevent tampering
🧯 If You Can't Patch
- Disable or restrict the application on affected devices
- Implement network-level controls to prevent unauthorized access to application services
🔍 How to Verify
Check if Vulnerable:
Check application version in settings. If version is 11.4 or earlier, the application is vulnerable.Check Version:
Check application settings or app store listing for version informationVerify Fix Applied:
Verify that privilege checks are performed server-side and cannot be bypassed by modifying local storage.📡 Detection & Monitoring
Log Indicators:
- Unexpected administrative access from non-admin users
- Premium feature usage without payment verification
Network Indicators:
- Unauthorized API calls to administrative endpoints
- Suspicious privilege escalation attempts
SIEM Query:
Search for: (event_type="privilege_escalation" OR event_type="admin_access") AND app_name="Testes de Codigo"