OS command injection vulnerability in Inaba Denki Sangyo Wi-Fi AP UNIT


Wi-Fi AP UNIT provided by Inaba Denki Sangyo Co., Ltd. contains an OS command injection vulnerability (CWE-78).

Chuya Hayakawa of 00One, Inc. reported this vulnerability to JPCERT/CC.
JPCERT/CC coordinated with the developer.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 7.2 (High) [Other]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: High
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
CVSS V2 Severity:
Base Metrics 6.5 (Medium) [Other]
  • Access Vector: Network
  • Access Complexity: Low
  • Authentication: Single Instance
  • Confidentiality Impact: Partial
  • Integrity Impact: Partial
  • Availability Impact: Partial
Affected Products

  • AC-PD-WAPU v1.05_B04 and earlier
  • AC-PD-WAPU-P v1.05_B04P and earlier
  • AC-PD-WAPUM v1.05_B04 and earlier
  • AC-PD-WAPUM-P v1.05_B04P and earlier
  • AC-WAPU-300 v1.00_B07 and earlier
  • AC-WAPU-300-P v1.00_B08P and earlier
  • AC-WAPUM-300 v1.00_B07 and earlier
  • AC-WAPUM-300-P v1.00_B08P and earlier

OS command injection vulnerability in Wi-Fi AP UNIT (PDF,in Japanese)

An arbitrary OS command may be executed by an authenticated user with the administrative privilege.


[Apply the workaround]
The developer states that these products are no longer supported and recommends the following mitigations.

* Change the initial configuration values
* Change IP address

* Change device operation setting
* Prohibit access to the WEB UI (the setting page) from WAN/Wireless interface (Only allow through the front LAN port)

* Change filtering configuration
* Set the MAC address of the client to allow wireless connection
* Configure VPN, IP filters, etc. to restrict connections from the client

* Other Cautions
* Setup a firewall and run the product behind it
* Do not access to other websites while logged into the setting page of the product
* Close the web browser after finishing the operation in the setting page
* Delete the password for the setting page saved in the web browser
Vendor Information

CWE (What is CWE?)

  1. SQL Injection(CWE-89) [Other]
CVE (What is CVE?)

  1. CVE-2023-28392

  1. JVN : JVNVU#98968780
  2. National Vulnerability Database (NVD) : CVE-2023-28392
Revision History

  • [2023/05/17]
      Web page was published
  • [2023/06/12]
      Affected Products : Products were added
      Impact was modified
      Solution was modified