Moxa MXsecurity Series Restricted Shell Command Injection Remote Code Execution Vulnerability

May 24th, 2023
ZDI-23-721 ZDI-CAN-19895

CVE ID

CVE-2023-33235

CVSS Score

7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Moxa

Affected Products

MXsecurity Series

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Moxa MXsecurity Series appliances. Authentication is required to exploit this vulnerability.

The specific flaw exists within the SSH CLI program. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of the administrative user.

Additional Details

Moxa has issued an update to correct this vulnerability. More details can be found at:
https://www.moxa.com/en/support/product-support/security-advisory/mxsecurity-command-injection-and-hardcoded-credential-vulnerabilities

Disclosure Timeline

  • 2023-01-26 - Vulnerability reported to vendor
  • 2023-05-24 - Coordinated public release of advisory

Credit

Simon Janz (@esj4y)

Back to Advisories