CVE-2020-7500 – This SQL injection vulnerability in Schneider E... (How to Fix)

Q: What is the severity of CVE-2020-7500?

CVE-2020-7500 has a CVSS score of 9.8 (CRITICAL). This SQL injection vulnerability in Schneider Electric U.motion Servers and Touch Panels allows attackers to execute arbitrary code by injecting malicious SQL commands. Affected organizations using vulnerable versions could have their building automation systems compromised.

📋 TL;DR

This SQL injection vulnerability in Schneider Electric U.motion Servers and Touch Panels allows attackers to execute arbitrary code by injecting malicious SQL commands. Affected organizations using vulnerable versions could have their building automation systems compromised.

💻 Affected Systems

Products:

U.motion Servers
U.motion Touch Panels

Versions: Specific versions listed in SEVD-2020-133-03 advisory

Operating Systems: Embedded systems running U.motion software

Default Config Vulnerable: ⚠️ Yes

Notes: All default configurations of affected versions are vulnerable. Requires network access to the U.motion interface.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full system compromise allowing attackers to execute arbitrary code, modify building automation controls, access sensitive data, and pivot to other network systems.

🟠

Likely Case

Data exfiltration, system manipulation, and potential disruption of building automation functions.

🟢

If Mitigated

Limited impact with proper network segmentation, input validation, and monitoring in place.

🌐 Internet-Facing: HIGH

🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

SQL injection vulnerabilities typically have low exploitation complexity when unauthenticated access is available.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Versions specified in SEVD-2020-133-03 advisory

Vendor Advisory: https://www.se.com/ww/en/download/document/SEVD-2020-133-03/

Restart Required: Yes

Instructions:

1. Download the patched firmware from Schneider Electric's website. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Restart the device. 5. Verify the update was successful.

🔧 Temporary Workarounds

Network Segmentation

all

Isolate U.motion systems from untrusted networks and internet access

Input Validation

all

Implement web application firewall rules to block SQL injection patterns

🧯 If You Can't Patch

Implement strict network access controls to limit exposure
Deploy intrusion detection systems to monitor for SQL injection attempts

🔍 How to Verify

Check if Vulnerable:

Check device firmware version against vulnerable versions listed in SEVD-2020-133-03 advisory

Check Version:

Check version through U.motion web interface or device management console

Verify Fix Applied:

Verify firmware version matches patched version from Schneider Electric advisory

📡 Detection & Monitoring

Log Indicators:

Unusual SQL queries in application logs
Multiple failed authentication attempts followed by SQL-like patterns

Network Indicators:

HTTP requests containing SQL keywords (SELECT, UNION, etc.) to U.motion endpoints

SIEM Query:

source="u.motion" AND (http_uri="*SELECT*" OR http_uri="*UNION*" OR http_uri="*INSERT*" OR http_uri="*DELETE*")

📊 Metadata

CVE ID: CVE-2020-7500

CVSS v3 Score: 9.8 (CRITICAL)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-89

Published: June 16, 2020

Last Updated: November 21, 2024

🔗 References

https://www.se.com/ww/en/download/document/SEVD-2020-133-03/ Vendor Advisory
https://www.se.com/ww/en/download/document/SEVD-2020-133-03/ Vendor Advisory

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