CVE-2021-30657 — AI Deep Analysis Summary

🚨 **Essence**: Logic flaw in macOS Gatekeeper. <br/>📉 **Consequences**: Security features like File Quarantine & Notarization are bypassed. Attackers can execute malicious code with a simple click. 🖱️

🛡️ **Root Cause**: Logic error in `syspolicyd`. <br/>🔍 **Flaw**: The system fails to properly validate application bundles downloaded from the internet.…

🍎 **Vendor**: Apple. <br/>💻 **Product**: macOS.…

⚔️ **Action**: Bypass foundational security checks. <br/>🔓 **Privileges**: Execute arbitrary shell scripts/apps. <br/>🎯 **Impact**: Full system compromise via social engineering (double-click).…

📉 **Threshold**: LOW. <br/>👤 **Auth**: User interaction required (double-click). <br/>⚙️ **Config**: No special config needed. <br/>🌐 **Vector**: Downloaded app bundle from internet.…

🔓 **Public Exp?**: YES. <br/>📦 **PoC**: Available on GitHub (shubham0d/CVE-2021-30657). <br/>🛠️ **Method**: Generates a `bait.dmg` with malicious payload. <br/>🌍 **Wild Exp**: Likely, given the simplicity of the bypass.

🔍 **Check**: Verify macOS version against affected list. <br/>🛡️ **Feature**: Check if Gatekeeper/Quarantine is active (though bypassed).…

✅ **Fixed**: YES. <br/>📜 **Source**: Apple Support (HT212326, HT212325). <br/>🔧 **Mitigation**: Update macOS to a patched version. <br/>📅 **Published**: 2021-09-08.

🚧 **Workaround**: <br/>1. 🚫 Disable internet downloads for apps. <br/>2. 🛑 Manually verify app notarization status. <br/>3. 🛡️ Use third-party EDR solutions. <br/>4. 👀 Educate users NOT to double-click unknown DMGs.

🔥 **Urgency**: HIGH. <br/>⚡ **Priority**: Immediate patching. <br/>💡 **Reason**: Easy exploitation (click-based) + Bypass of core security. <br/>🎯 **Target**: All macOS 11.x users in listed versions.