CVE-2025-20769

# CVE-2025-20769 PoC - MediaTek Display Component Out of Bounds Write # This PoC demonstrates the vulnerability pattern (for educational purposes only) import os import sys def check_vulnerability(): """ Check if the system is vulnerable to CVE-2025-20769 Requires: MediaTek device with ALPS display component """ print("[*] CVE-2025-20769 Vulnerability Checker") print("[*] Target: MediaTek Display Component") print("[*] Vulnerability: Out of Bounds Write due to missing bounds check") # Check if running on MediaTek device try: with open('/proc/cpuinfo', 'r') as f: cpuinfo = f.read() if 'MediaTek' in cpuinfo or 'mt' in cpuinfo.lower(): print("[+] MediaTek chipset detected") else: print("[-] Non-MediaTek device - may not be affected") return False except: print("[-] Unable to read system information") return False # Check kernel version and patch status kernel_version = os.popen('uname -r').read().strip() print(f"[*] Kernel version: {kernel_version}") # Note: Actual exploitation requires: # 1. System-level privileges (PR:H required) # 2. Access to display driver ioctl interface # 3. Ability to craft malicious display buffer data print("\n[!] This is a LOCAL privilege escalation vulnerability") print("[!] Attacker must already have System privileges") print("[!] No user interaction required for exploitation") return None # Requires actual device testing def simulate_exploit(): """ Conceptual exploit structure for CVE-2025-20769 """ print("\n[*] Simulating exploit structure...") # Step 1: Obtain System privileges (prerequisite) print("[1] Prerequisites: System-level access obtained") # Step 2: Access display driver interface print("[2] Open display driver device: /dev/display") # Step 3: Craft malicious buffer with oversized data malicious_buffer = b'A' * 0x10000 # Exceed buffer boundary print(f"[3] Craft malicious buffer: {len(malicious_buffer)} bytes") # Step 4: Trigger out of bounds write via ioctl print("[4] Send crafted buffer to display driver ioctl") print("[*] Missing bounds check allows overflow") # Step 5: Achieve privilege escalation print("[5] Overwrite kernel structures to escalate privileges") print("[+] Exploitation successful - root access obtained") if __name__ == "__main__": check_vulnerability()

{"cve": {"id": "CVE-2025-20769", "sourceIdentifier": "[email protected]", "published": "2025-12-02T03:16:18.340", "lastModified": "2025-12-03T21:03:10.127", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "In display, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS10196993; Issue ID: MSV-4804."}, {"lang": "es", "value": "En la visualización, existe una posible escritura fuera de límites debido a una comprobación de límites ausente. Esto podría conducir a una escalada local de privilegios si un actor malicioso ya ha obtenido los privilegios del Sistema. No se necesita interacción del usuario para la explotación. ID del parche: ALPS10196993; ID del problema: MSV-4804."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 6.7, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 0.8, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N", "baseScore": 3.4, "baseSeverity": "LOW", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 0.8, "impactScore": 2.5}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-121"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"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:mediatek:mt2718:-:*:*:*:*:*:*:*", "matchCriteriaId": "F5506327-7DDF-4E88-9EA8-10B8E32F848B"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6739:-:*:*:*:*:*:*:*", "matchCriteriaId": "7FA8A390-9F52-4CF3-9B45-936CE3E2B828"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6761:-:*:*:*:*:*:*:*", "matchCriteriaId": "F726F486-A86F-4215-AD93-7A07A071844A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6765:-:*:*:*:*:*:*:*", "matchCriteriaId": "43E779F6-F0A0-4153-9A1D-B715C3A2F80E"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6768:-:*:*:*:*:*:*:*", "matchCriteriaId": "06CD97E1-8A76-48B4-9780-9698EF5A960F"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6781:-:*:*:*:*:*:*:*", "matchCriteriaId": "C4EEE021-6B2A-47A0-AC6B-55525A40D718"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6789:-:*:*:*:*:*:*:*", "matchCriteriaId": "8B9B0D82-82C1-4A77-A016-329B99C45F49"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6833:-:*:*:*:*:*:*:*", "matchCriteriaId": "9814939B-F05E-4870-90C0-7C0F6BAAEB39"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6835:-:*:*:*:*:*:*:*", "matchCriteriaId": "19A63103-C708-48EC-B44D-5E465A6B79C5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6853:-:*:*:*:*:*:*:*", "matchCriteriaId": "366F1912-756B-443E-9962-224937DD7DFB"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6855:-:*:*:*:*:*:*:*", "matchCriteriaId": "89AFEE24-7AAD-4EDB-8C3E-EDBA3240730A"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6877:-:*:*:*:*:*:*:*", "matchCriteriaId": "7CA9352F-E9BD-4656-9B7C-4AFEE2C78E58"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6878:-:*:*:*:*:*:*:*", "matchCriteriaId": "855A8046-34ED-4891-ACE5-76AB10AC8D53"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6879:-:*:*:*:*:*:*:*", "matchCriteriaId": "704BE5CE-AE08-4432-A8B0-4C8BD62148AD"}, {"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:mt6886:-:*:*:*:*:*:*:*", "matchCriteriaId": ... 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