CVE-2024-9970
📋 TL;DR
The FlowMaster BPM Plus system has a privilege escalation vulnerability where remote attackers with regular user privileges can manipulate a specific cookie to gain administrator access. This affects all organizations using vulnerable versions of FlowMaster BPM Plus. Attackers can take full control of the system once they elevate privileges.
💻 Affected Systems
- FlowMaster BPM Plus
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative control, allowing data theft, system manipulation, and further network penetration.
Likely Case
Attackers gain administrative access to the BPM system, enabling data exfiltration, configuration changes, and potential lateral movement.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place, though administrative access to the BPM system would still be compromised.
🎯 Exploit Status
Requires existing regular user credentials. Exploitation involves cookie manipulation which is straightforward for attackers with basic web skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-8137-ea537-2.html
Restart Required: Yes
Instructions:
1. Contact NewType for the security patch. 2. Apply the patch to all FlowMaster BPM Plus instances. 3. Restart the application services. 4. Verify the fix by testing privilege escalation attempts.
🔧 Temporary Workarounds
Cookie Validation Enhancement
allImplement additional server-side validation for authentication cookies to detect tampering
Requires custom application modification - consult vendor for implementation details
Network Segmentation
allIsolate FlowMaster BPM Plus systems from critical network segments
firewall rules to restrict access to necessary IPs only
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the FlowMaster system
- Enable detailed logging of authentication events and monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Test if regular users can modify authentication cookies to gain admin access. Check application version against vendor advisory.Check Version:
Check application admin panel or consult vendor documentation for version check procedureVerify Fix Applied:
Attempt the cookie manipulation exploit after patching - it should fail. Verify new version matches vendor's patched version.📡 Detection & Monitoring
Log Indicators:
- Multiple privilege escalation attempts
- Unusual admin access from regular user accounts
- Cookie manipulation patterns in web logs
Network Indicators:
- HTTP requests with modified authentication cookies
- Unusual admin-level API calls from regular user sessions
SIEM Query:
source="flowmaster" AND (event_type="authentication" AND result="success" AND user_role_changed="true")