CVE-2024-4638 – CVE-2024-4638 is a command injection vulnerabil... (How to Fix)

Q: What is the severity of CVE-2024-4638?

CVE-2024-4638 has a CVSS score of 7.1 (HIGH). CVE-2024-4638 is a command injection vulnerability in OnCell G3470A-LTE Series industrial cellular routers. Attackers can execute arbitrary commands by manipulating inputs in the web key upload function. Organizations using affected firmware versions are at risk.

📋 TL;DR

CVE-2024-4638 is a command injection vulnerability in OnCell G3470A-LTE Series industrial cellular routers. Attackers can execute arbitrary commands by manipulating inputs in the web key upload function. Organizations using affected firmware versions are at risk.

💻 Affected Systems

Products:

Moxa OnCell G3470A-LTE Series

Versions: v1.7.7 and prior

Operating Systems: Embedded firmware

Default Config Vulnerable: ⚠️ Yes

Notes: All devices running affected firmware versions with web interface enabled are vulnerable.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Full device compromise allowing attackers to execute arbitrary commands, potentially gaining persistent access, disrupting operations, or pivoting to internal networks.

🟠

Likely Case

Unauthorized command execution leading to device configuration changes, service disruption, or credential theft.

🟢

If Mitigated

Limited impact if proper network segmentation and input validation controls are implemented.

🌐 Internet-Facing: HIGH - Web interface accessible from internet could allow remote exploitation without authentication.

🏢 Internal Only: MEDIUM - Requires internal network access but could still be exploited by malicious insiders or compromised internal systems.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Command injection vulnerabilities typically have low exploitation complexity, especially when unauthenticated.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: v1.7.8 or later

Vendor Advisory: https://www.moxa.com/en/support/product-support/security-advisory/mpsa-242550-oncell-g3470a-lte-series-multiple-web-application-vulnerabilities

Restart Required: Yes

Instructions:

1. Download firmware v1.7.8 or later from Moxa website. 2. Log into device web interface. 3. Navigate to System Maintenance > Firmware Upgrade. 4. Upload new firmware file. 5. Wait for upgrade to complete and device to reboot.

🔧 Temporary Workarounds

Disable web interface

all

Disable the web management interface if not required for operations

Network segmentation

all

Restrict access to device management interface using firewall rules

🧯 If You Can't Patch

Implement strict network access controls to limit device management interface access
Monitor device logs for unusual command execution or configuration changes

🔍 How to Verify

Check if Vulnerable:

Check firmware version via web interface: System Information > Firmware Version

Check Version:

Check via web interface or serial console: show version

Verify Fix Applied:

Verify firmware version is v1.7.8 or later after patching

📡 Detection & Monitoring

Log Indicators:

Unusual command execution in system logs
Multiple failed login attempts
Unexpected configuration changes

Network Indicators:

Unusual outbound connections from device
Traffic to unexpected ports
Suspicious HTTP requests to management interface

SIEM Query:

source="oncell-g3470a" AND (event="command_execution" OR event="config_change")

📊 Metadata

CVE ID: CVE-2024-4638

CVSS v3 Score: 7.1 (HIGH)

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

CWE: CWE-77

Published: June 25, 2024

Last Updated: March 10, 2025

🔗 References

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

If you're affected by CVE-2024-4638, you might also want to check these: