CVE-2018-7841
📋 TL;DR
This CVE describes a SQL injection vulnerability in Schneider Electric U.motion Builder software version 1.3.4 that allows attackers to execute arbitrary code on affected systems. The vulnerability is caused by improper input validation when processing certain character sequences. Organizations using U.motion Builder 1.3.4 for building automation systems are affected.
💻 Affected Systems
- Schneider Electric U.motion Builder
📦 What is this software?
U.motion Builder by Schneider Electric
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data theft, and potential lateral movement within building automation networks.
Likely Case
Unauthorized access to building automation systems, manipulation of control systems, and potential disruption of building operations.
If Mitigated
Limited impact if proper network segmentation and input validation controls are implemented, though vulnerability remains present.
🎯 Exploit Status
Public exploit code exists and has been weaponized. Attack requires no authentication and has low technical complexity.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.3.5 or later
Vendor Advisory: https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-071-02
Restart Required: Yes
Instructions:
1. Download U.motion Builder version 1.3.5 or later from Schneider Electric website. 2. Uninstall current version 1.3.4. 3. Install the updated version. 4. Restart the system.
🔧 Temporary Workarounds
Network Isolation
allIsolate U.motion Builder systems from untrusted networks and internet access.
Configure firewall rules to block external access to U.motion Builder ports
Implement network segmentation
Input Validation Enhancement
allImplement additional input validation at network perimeter or application layer.
Deploy WAF with SQL injection protection rules
Implement input sanitization in front-end systems
🧯 If You Can't Patch
- Immediately isolate affected systems from production networks and internet access
- Implement strict network access controls and monitor all traffic to/from U.motion Builder systems
🔍 How to Verify
Check if Vulnerable:
Check U.motion Builder version in Help > About menu. If version is 1.3.4, system is vulnerable.Check Version:
Check Help > About in U.motion Builder application interfaceVerify Fix Applied:
After patching, verify version shows 1.3.5 or later in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts followed by SQL-like patterns
- Unexpected process execution from U.motion Builder
Network Indicators:
- SQL injection patterns in HTTP requests to U.motion Builder
- Unusual outbound connections from U.motion Builder systems
SIEM Query:
source="U.motion Builder" AND (event_description="SQL" OR event_description="injection" OR event_description="exec")🔗 References
- http://packetstormsecurity.com/files/152862/Schneider-Electric-U.Motion-Builder-1.3.4-Command-Injection.html
- http://seclists.org/fulldisclosure/2019/May/26
- https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-071-02
- http://packetstormsecurity.com/files/152862/Schneider-Electric-U.Motion-Builder-1.3.4-Command-Injection.html
- http://seclists.org/fulldisclosure/2019/May/26
- https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-071-02
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-7841
