Multiple vulnerabilities in CBC digital video recorders


Digital video recorders provided by CBC Co.,Ltd. contain multiple vulnerabilities listed below.

* Improper authentication (CWE-287) - CVE-2023-38585
* OS command injection (CWE-78) - CVE-2023-40144
* Hidden functionality (CWE-912) - CVE-2023-40158

Yoshiki Mori, Ushimaru Hayato, Hiromu Kubiura and Masaki Kubo of National Institute of Information and Communications Technology Cybersecurity Research Institute reported these vulnerabilities to JPCERT/CC.
JPCERT/CC coordinated with the developer.
CVSS Severity (What is CVSS?)

CVSS V3 Severity:
Base Metrics 8.8 (High) [Other]
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Scope: Unchanged
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
Affected Products

  • DR-16F series
  • DR-16H series
  • DR-16M series
  • DR-4F series
  • DR-4H series
  • DR-4M41 series
  • DR-4M51 series
  • DR-8F series
  • DR-8H series
  • DR-8M series
  • NR-16F series
  • NR-16M series
  • NR-4F series
  • NR-4M series
  • NR-8F series
  • NR-8M series
  • NR16H series
  • NR4H series
  • NR8H series


An arbitrary OS command may be executed on the device or its settings may be altered by a remote attacker.

This analysis assumes a scenario that OS commands are executed on the device using the credentials obtained by exploiting CVE-2023-38585 vulnerability.

[Update the firmware]
For the following devices, update the firmware to the latest version according to the information provided by the developer.

* NR-4M, NR-8M, NR-16M series
* NR-4F, NR-8F, NR-16F series
* DR-16M, DR-8M, DR-4M51 series

[Stop connecting to the internet]
Since the devices listed below are no longer supported, they do not meet current security requirements. Therefore, it is not suitable for connecting to internet.
* NR4H, NR8H, NR16H series
* DR-16F, DR-8F, DR-4F, DR-16H, DR-8H, DR-4H, DR-4M41 series

For more information, refer to the information provided by the developer.
Vendor Information

CWE (What is CWE?)

  1. Improper Authentication(CWE-287) [Other]
  2. OS Command Injection(CWE-78) [Other]
  3. Hidden Functionality(CWE-912) [Other]
CVE (What is CVE?)

  1. CVE-2023-38585
  2. CVE-2023-40144
  3. CVE-2023-40158

  1. JVN : JVNVU#92545432
Revision History

  • [2023/08/22]
      Web page was published