Mitrastar GPT-2541GNAC-N1 Privilege Escalation

Risk: Medium
Local: Yes
Remote: No
CWE: CWE-264

# Exploit Title: Mitrastar GPT-2541GNAC-N1 - Privilege escalation # Date: 10-08-2021 # Exploit Author: Leonardo Nicolas Servalli # Vendor Homepage: # Platform: Mistrastar router devices GPT-2541GNAC-N1 (HGU) # Tested on: Firmware BR_g3.5_100VNZ0b33 # Vulnerability analysis: Description: ---------- # Mitrastar GPT-2541GNAC-N1 devices are provided with access through ssh into a restricted default shell (credentials are on the back of the router and in some cases this routers use default credentials). # The command “deviceinfo show file <path>” is used from reduced CLI to show files and directories. Because this command do not handle correctly special characters, is possible to insert a second command as a parameter on the <path> value. By using “&&/bin/bash” as parameter value we can spawn a bash console, as seen on the next example: Exploit: -------- > deviceinfo show file &&/bin/bash # This command will spawn a full interoperable bash console with root privileges.

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