CVE-2018-8847 – A stack-based buffer overflow vulnerability in ... (How to Fix)

Q: What is the severity of CVE-2018-8847?

CVE-2018-8847 has a CVSS score of 9.8 (CRITICAL). A stack-based buffer overflow vulnerability in Eaton 9000X DriveA versions 2.0.29 and earlier allows remote attackers to execute arbitrary code on affected industrial control systems. This affects organizations using Eaton 9000X DriveA motor drives in industrial environments.

📋 TL;DR

A stack-based buffer overflow vulnerability in Eaton 9000X DriveA versions 2.0.29 and earlier allows remote attackers to execute arbitrary code on affected industrial control systems. This affects organizations using Eaton 9000X DriveA motor drives in industrial environments.

💻 Affected Systems

Products:

Eaton 9000X DriveA

Versions: 2.0.29 and prior

Operating Systems: Embedded/Industrial Control System

Default Config Vulnerable: ⚠️ Yes

Notes: Industrial control system used for motor drives in manufacturing and industrial environments.

📦 What is this software?

9000x Firmware by Eaton

View all CVEs affecting 9000x Firmware →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, potential physical damage to industrial equipment, and disruption of industrial processes.

🟠

Likely Case

Remote code execution allowing attackers to manipulate motor drive operations, potentially causing equipment damage or production downtime.

🟢

If Mitigated

Limited impact if systems are isolated from untrusted networks and proper access controls are implemented.

🌐 Internet-Facing: HIGH - If exposed to internet, attackers can remotely exploit without authentication.

🏢 Internal Only: HIGH - Even internally, vulnerable systems can be exploited by compromised internal hosts or malicious insiders.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Buffer overflow vulnerabilities in industrial control systems are often targeted due to potential for physical impact.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Version 2.0.30 or later

Vendor Advisory: http://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/Eaton_9000X_Drive.pdf

Restart Required: Yes

Instructions:

1. Download firmware update from Eaton support portal. 2. Backup current configuration. 3. Apply firmware update following Eaton's update procedures. 4. Restart the drive. 5. Verify firmware version.

🔧 Temporary Workarounds

Network Segmentation

all

Isolate Eaton 9000X DriveA systems from untrusted networks and internet access.

Access Control Lists

all

Implement strict network access controls to limit communication to only authorized systems.

🧯 If You Can't Patch

Implement strict network segmentation to isolate vulnerable drives from all untrusted networks.
Deploy intrusion detection systems to monitor for exploitation attempts and anomalous traffic patterns.

🔍 How to Verify

Check if Vulnerable:

Check firmware version via Eaton's configuration software or web interface. If version is 2.0.29 or earlier, system is vulnerable.

Check Version:

Use Eaton DriveExplorer or similar configuration software to check firmware version.

Verify Fix Applied:

Verify firmware version is 2.0.30 or later using Eaton's configuration tools.

📡 Detection & Monitoring

Log Indicators:

Unusual network traffic to drive controllers
Firmware modification attempts
Unexpected drive parameter changes

Network Indicators:

Unusual traffic patterns to port 502 (Modbus) or other drive communication ports
Buffer overflow patterns in network traffic

SIEM Query:

source_ip=* AND dest_port=502 AND (payload_size>threshold OR pattern_match='buffer_overflow_signature')

📊 Metadata

CVE ID: CVE-2018-8847

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-121

Published: July 13, 2018

Last Updated: November 21, 2024

🔗 References

http://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/Eaton_9000X_Drive.pdf Vendor Advisory
http://www.securityfocus.com/bid/104736 Third Party Advisory,VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-193-01 Mitigation,Third Party Advisory,US Government Resource
http://www.eaton.com/content/dam/eaton/company/news-insights/cybersecurity/security-bulletins/Eaton_9000X_Drive.pdf Vendor Advisory
http://www.securityfocus.com/bid/104736 Third Party Advisory,VDB Entry
https://ics-cert.us-cert.gov/advisories/ICSA-18-193-01 Mitigation,Third Party Advisory,US Government Resource

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🔗 Related Vulnerabilities

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