CVE-2025-46291

// CVE-2025-46291 PoC - macOS Gatekeeper Bypass // Note: This is a conceptual PoC for educational purposes only // Actual exploitation requires specific conditions and macOS Tahoe 26.2 #include <stdio.h> #include <stdlib.h> #include <string.h> // Simulated Gatekeeper bypass logic int validate_app_signature(char *app_bundle) { // Normal validation would check: // 1. Code signature validity // 2. Notarization ticket // 3. Entitlement flags // 4. Bundle structure integrity // Bypass condition: Logic flaw in validation // The validation checks signature but fails to verify // specific entitlement flags or notarization status properly if (check_code_signature(app_bundle) == 0) { // Logic bug: Returns success without full validation return 0; // Bypassed! } return -1; } int main(int argc, char *argv[]) { if (argc < 2) { printf("Usage: %s <malicious_app_bundle>\n", argv[0]); return 1; } char *malicious_app = argv[1]; printf("Attempting to bypass Gatekeeper for: %s\n", malicious_app); // Craft malicious app with specific structure // that triggers the logic validation flaw craft_malicious_bundle(malicious_app); // Attempt bypass if (validate_app_signature(malicious_app) == 0) { printf("[+] Gatekeeper bypass successful!\n"); printf("[+] Malicious app can now execute with full permissions\n"); execute_malicious_payload(malicious_app); } else { printf("[-] Bypass failed\n"); } return 0; } // Helper functions (simplified) int check_code_signature(char *bundle) { // Simulated signature check return 0; // Always returns valid for PoC } void craft_malicious_bundle(char *path) { // Create malicious app bundle with crafted signature } void execute_malicious_payload(char *app) { // Execute arbitrary code with user privileges }

{"cve": {"id": "CVE-2025-46291", "sourceIdentifier": "[email protected]", "published": "2025-12-17T21:16:14.287", "lastModified": "2025-12-26T17:15:43.640", "vulnStatus": "Modified", "cveTags": [], "descriptions": [{"lang": "en", "value": "A logic issue was addressed with improved validation. This issue is fixed in macOS Tahoe 26.2. An app may bypass Gatekeeper checks."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 1.8, "impactScore": 5.9}, {"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:N/I:H/A:N", "baseScore": 5.5, "baseSeverity": "MEDIUM", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 1.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-693"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionEndExcluding": "26.2", "matchCriteriaId": "FBA92B6D-E36C-432B-A041-94D81427CD75"}]}]}], "references": [{"url": "https://support.apple.com/en-us/125886", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}