TOTOLINK X5000R OS Command Injection Vulnerability in setScheduleCfg

An OS command injection vulnerability has been identified in the TOTOLINK X5000R router, specifically in firmware version 9.1.0cu.2350_B20230313. The vulnerability arises in the 'setScheduleCfg' function within the '/web/cgi-bin/cstecgi.cgi' file. Authenticated attackers can exploit this issue by sending crafted requests that include malicious commands, which are then executed on the device.

Impact

Exploitation of this vulnerability allows authenticated attackers to execute arbitrary commands on the affected device.

Reproduction

To reproduce this vulnerability, send a POST request to '/cgi-bin/cstecgi.cgi' with the 'recHour' parameter (along with other scheduling parameters) containing a payload that includes a command to be executed, such as a command to list directory contents redirected to a file in the '/tmp' directory.