(Pwn2Own) Phoenix Contact CHARX SEC-3100 OCPP Protocol UpdateFirmware Command Injection Remote Code Execution Vulnerability
Vulnerability Details
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Phoenix Contact CHARX SEC-3100 devices. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the handling of the location parameter of the UpdateFirmwareRequest command. 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 charx-oa user.
Additional Details
Phoenix Contact has issued an update to correct this vulnerability. More details can be found at:
https://cert.vde.com/en/advisories/VDE-2024-011/
Disclosure Timeline
- 2024-02-02 - Vulnerability reported to vendor
- 2024-06-21 - Coordinated public release of advisory
- 2024-08-15 - Advisory Updated
Credit
Chris Anastasio @mufinnnnnnn & Fabius Watson
