CVE-2021-3560 — AI Deep Analysis Summary

🚨 **Essence**: CVE-2021-3560 is a critical **Authentication Bypass** in **polkit**. It allows unprivileged users to bypass authentication checks via DBus.…

🛡️ **Root Cause**: **CWE-863** (Incorrect Authorization). The flaw occurs when a process disconnects from **dbus-daemon** before `polkit_system_bus_name_get_creds_sync` completes.…

📦 **Affected Components**: **polkit** (PolicyKit) on **Linux/Unix** systems. 📋 **Affected Distributions**: **Ubuntu 20.04**, **RHEL 8**, **Fedora 21**, **Debian testing (Bullseye)**.…

💀 **Attacker Actions**: An unprivileged user can call privileged methods (`CreateUser`, `SetPassword`) via DBus. 🛠️ **Impact**: They can create a new **privileged user**, set a password, and log in.…

📉 **Threshold**: **LOW**. 🚪 **Auth**: **None** required. Any local unprivileged user can exploit this. ⚙️ **Config**: Requires the vulnerable polkit version and accountsservice.…

🔥 **Public Exploits**: **YES**. Multiple PoCs are available on GitHub. 📂 **Examples**: `polkit-auto-exploit`, `polkadots`, `CVE-2021-3560` (C-based), and Bash scripts. 🌍 **Wild Exploitation**: High.…

🔍 **Self-Check**: Check polkit version. 📝 **Scan**: Look for vulnerable versions in Ubuntu 20.04, RHEL 8, Fedora 21, Debian Bullseye.…

🩹 **Official Fix**: **YES**. The vulnerability was disclosed in June 2021. 📦 **Patch**: Vendors released updates for polkit. Users must update polkit to the patched version.…

🛑 **No Patch Workaround**: If patching is delayed, restrict **local user access**. 🚫 **Mitigation**: Disable unnecessary DBus services or restrict polkit rules.…

🚨 **Urgency**: **CRITICAL**. 🔴 **Priority**: **P0**. This is a **Local Privilege Escalation (LPE)** vulnerability with **no authentication** required. It grants **root** access instantly.…