CVE-2023-28392 – This vulnerability allows authenticated users w... (How to Fix)

Q: What is the severity of CVE-2023-28392?

CVE-2023-28392 has a CVSS score of 7.2 (HIGH). This vulnerability allows authenticated users with administrative privileges to execute arbitrary operating system commands on affected Wi-Fi AP UNIT devices. Attackers with admin access can gain full system control, potentially compromising the entire network infrastructure. Organizations using these specific Wi-Fi access point models are affected.

📋 TL;DR

This vulnerability allows authenticated users with administrative privileges to execute arbitrary operating system commands on affected Wi-Fi AP UNIT devices. Attackers with admin access can gain full system control, potentially compromising the entire network infrastructure. Organizations using these specific Wi-Fi access point models are affected.

💻 Affected Systems

Products:

Wi-Fi AP UNIT AC-PD-WAPU
AC-PD-WAPUM
AC-PD-WAPU-P
AC-PD-WAPUM-P
AC-WAPU-300
AC-WAPU-300-P
AC-WAPUM-300
AC-WAPUM-300-P

Versions: v1.05_B04 and earlier, v1.05_B04P and earlier, v1.00_B07 and earlier, v1.00_B08P and earlier depending on model

Operating Systems: Embedded firmware

Default Config Vulnerable: ⚠️ Yes

Notes: Requires authenticated administrative access to exploit. All default configurations with admin access are vulnerable.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete device takeover leading to network compromise, data exfiltration, lateral movement to other systems, and persistent backdoor installation.

🟠

Likely Case

Privileged attacker escalates to full system control, modifies device configurations, intercepts network traffic, or installs malware.

🟢

If Mitigated

Limited to authorized administrators only, but still represents significant risk if admin credentials are compromised.

🌐 Internet-Facing: HIGH if devices are exposed to internet with admin interfaces accessible.

🏢 Internal Only: MEDIUM as it requires authenticated admin access, but insider threats or credential compromise could lead to exploitation.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: LOW

Exploitation requires admin credentials but once obtained, command execution is straightforward. No public exploit code identified in references.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Check vendor for specific fixed versions per model

Vendor Advisory: https://www.inaba.co.jp/abaniact/news/Wi-Fi%20AP%20UNIT%E3%80%8CAC-WAPU-300%E3%80%8D%E3%81%AB%E3%81%8A%E3%81%91%E3%82%8BOS%E3%82%B3%E3%83%9E%E3%83%B3%E3%83%89%E3%82%A4%E3%83%B3%E3%82%B8%E3%82%A7%E3%82%AF%E3%82%B7%E3%83%A7%E3%83%B3%E3%81%AE%E8%84%86%E5%BC%B1%E6%80%A7%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6.pdf

Restart Required: Yes

Instructions:

1. Contact vendor for latest firmware updates
2. Download appropriate firmware for your model
3. Backup current configuration
4. Apply firmware update via web interface or console
5. Verify successful update and restore configuration if needed

🔧 Temporary Workarounds

Restrict Admin Access

all

Limit administrative access to trusted IP addresses and networks only

Configure firewall rules to restrict access to admin interface (typically port 80/443)

Strong Authentication Controls

all

Implement multi-factor authentication and strong password policies for admin accounts

🧯 If You Can't Patch

Isolate affected devices in separate network segments with strict firewall rules
Implement network monitoring for unusual command execution patterns
Regularly rotate admin credentials and audit access logs
Consider replacing with patched or alternative devices if critical

🔍 How to Verify

Check if Vulnerable:

Check device firmware version via web interface or console and compare against affected versions listed in advisory

Check Version:

Check via web interface at System > Firmware or similar menu, or console command varies by model

Verify Fix Applied:

Verify firmware version has been updated to patched version and test admin interface functionality

📡 Detection & Monitoring

Log Indicators:

Unusual command execution in system logs
Multiple failed admin login attempts followed by successful login
Unexpected configuration changes
Unusual process execution

Network Indicators:

Unusual outbound connections from AP devices
Traffic patterns inconsistent with normal AP operation
Unexpected administrative access from unusual IPs

SIEM Query:

Search for: (device_type:"Wi-Fi AP UNIT" AND (event_type:"command_execution" OR "configuration_change") AND user:"admin") OR (failed_login:>3 AND successful_login within 5 minutes)

📊 Metadata

CVE ID: CVE-2023-28392

CVSS v3 Score: 7.2 (HIGH)

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

CWE: CWE-78

Published: May 23, 2023

Last Updated: January 17, 2025

🔗 References

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