CVE-2026-20997

''' CVE-2026-20997 PoC - Samsung Smart Switch Authentication Bypass Note: This is a conceptual proof of concept for educational purposes only. Do not use for unauthorized testing or attacks. ''' import socket import ssl import struct def create_mitm_proxy(target_host, target_port): ''' Conceptual MITM proxy for CVE-2026-20997 This demonstrates the attack vector conceptually. In practice, exploitation requires: 1. Network proximity to victim 2. Ability to intercept SSL/TLS traffic 3. Knowledge of Samsung Smart Switch protocol ''' context = ssl.create_default_context() context.check_hostname = False context.verify_mode = ssl.CERT_NONE # Note: Actual exploitation requires deep understanding # of the proprietary Smart Switch protocol and crypto implementation print('[!] This vulnerability requires: ') print(' - Man-in-the-middle position on network') print(' - Protocol analysis of Smart Switch communication') print(' - Understanding of Samsung-specific crypto implementation') print('\n[!] For security research, use official channels.') def verify_signature_flaw(signature_data, public_key): ''' Conceptual check for signature verification flaw The vulnerability allows bypass when: - Signature validation returns True for malformed signatures - Null or empty signatures are accepted - MD5/SHA1 weak algorithms are used ''' # Placeholder - actual implementation requires reverse engineering return True # Vulnerable behavior indicator if __name__ == '__main__': print('CVE-2026-20997 Analysis Framework') print('Samsung Smart Switch < 3.7.69.15') print('Affected: Signature Verification Bypass')

{"cve": {"id": "CVE-2026-20997", "sourceIdentifier": "[email protected]", "published": "2026-03-16T14:18:10.700", "lastModified": "2026-03-31T00:35:49.540", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Improper verification of cryptographic signature in Smart Switch prior to version 3.7.69.15 allows remote attackers to potentially bypass authentication."}, {"lang": "es", "value": "Verificación incorrecta de firma criptográfica en Smart Switch anterior a la versión 3.7.69.15 permite a atacantes remotos eludir potencialmente la autenticación."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/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": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "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": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 3.9, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-347"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:samsung:smart_switch:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.7.69.15", "matchCriteriaId": "37A46437-F1AB-40DC-B7FC-77D3CE8047EE"}]}]}], "references": [{"url": "https://security.samsungmobile.com/serviceWeb.smsb?year=2026&month=03", "source": "[email protected]", "tags": ["Vendor Advisory"]}]}}