CVE-2021-30713 — AI Deep Analysis Summary

🚨 **Essence**: A critical **Input Validation Error** in macOS Big Sur's TCC subsystem. 📉 **Consequences**: Malicious apps can bypass privacy settings to steal sensitive user data without permission.

🛡️ **Root Cause**: **CWE-20** (Improper Input Validation). The TCC (Transparency, Consent, and Control) system fails to properly verify user-provided inputs, allowing unauthorized access requests.

📱 **Affected Versions**: macOS Big Sur only.…

💀 **Attacker Capabilities**: Gains **Unauthorized Access** to sensitive information. Can trick the OS into granting privacy permissions to malicious apps, effectively bypassing user consent.

⚠️ **Exploitation Threshold**: **Low to Medium**. Requires a **Malicious Application** to be installed or executed. It relies on social engineering or existing malware to trigger the TCC bypass.

🔍 **Public Exploit**: **No specific PoC** listed in the data. However, the vulnerability is confirmed via Apple Security Updates (APPLE-SA-2021-09-13-4). Wild exploitation likely exists via malicious apps.

🔎 **Self-Check**: Check your macOS version against the affected list above. Monitor for unexpected privacy permission prompts. Use Apple's official **Security Update 2021-005** to verify status.

✅ **Official Fix**: **YES**. Apple released **Security Update 2021-005** (Catalina) and corresponding updates for Big Sur. Reference: [Apple Support HT212529](https://support.apple.com/en-us/HT212529).

🚧 **No Patch Workaround**: **Restrict App Permissions**. Manually review Privacy & Security settings. Revoke access for suspicious apps. Do not grant permissions to untrusted software.

🔥 **Urgency**: **HIGH**. Privacy bypasses are critical. Update immediately to **macOS 11.3** or later to patch the TCC validation flaw and protect sensitive data.