CVE-2023-35134
📋 TL;DR
This vulnerability in Weintek Weincloud v0.13.6 allows attackers to reset passwords using only a valid JWT token for the target account. This affects organizations using Weintek Weincloud for industrial control system management, potentially enabling unauthorized access to critical systems.
💻 Affected Systems
- Weintek Weincloud
📦 What is this software?
Weincloud by Weintek
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems through unauthorized administrative access, leading to operational disruption, safety hazards, or data exfiltration.
Likely Case
Unauthorized access to Weincloud management interface, allowing configuration changes, data viewing, or privilege escalation within the affected system.
If Mitigated
Limited impact due to network segmentation and strong authentication controls preventing token interception or reuse.
🎯 Exploit Status
Requires a valid JWT token for the target account, which could be obtained through other means like session hijacking or token leakage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v0.13.7 or later
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-199-04
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download and install Weincloud v0.13.7 or later from official vendor sources. 3. Restart the Weincloud service. 4. Verify authentication mechanisms are functioning correctly.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Weincloud instances from untrusted networks to prevent token interception.
JWT Token Monitoring
allImplement monitoring for unusual JWT token usage patterns.
🧯 If You Can't Patch
- Implement strict network access controls to limit Weincloud access to authorized IPs only.
- Enforce multi-factor authentication and monitor for unusual password reset attempts.
🔍 How to Verify
Check if Vulnerable:
Check Weincloud version via web interface or configuration files. If version is exactly v0.13.6, system is vulnerable.Check Version:
Check web interface admin panel or configuration files for version information.Verify Fix Applied:
Verify version is v0.13.7 or later and test password reset functionality with JWT tokens only (should fail).📡 Detection & Monitoring
Log Indicators:
- Multiple password reset attempts using JWT tokens
- Successful password resets without proper authentication
Network Indicators:
- HTTP POST requests to password reset endpoints with JWT tokens in headers
SIEM Query:
source="weincloud" AND (event="password_reset" OR uri="/api/reset-password") AND token_present=true