CVE-2022-20821 — AI Deep Analysis Summary

🚨 **Essence**: Cisco IOS XR has an info leak flaw. 📉 **Consequences**: Unauthenticated access to Redis. Attackers can write arbitrary files to the filesystem & steal DB info.…

🛡️ **Root Cause**: CWE-200 (Info Exposure). 🐛 **Flaw**: Health check RPM activates TCP port 6379 by default. 📡 **Result**: Exposes the Redis instance inside the NOSi container without protection.

🏢 **Vendor**: Cisco. 📦 **Product**: Cisco IOS XR Software. 🖥️ **Component**: Health check RPM / Redis instance in NOSi container. ⚠️ **Scope**: Devices running this specific OS configuration.

🕵️ **Privileges**: Unauthenticated Remote Access. 📂 **Actions**: Write arbitrary files to Redis container filesystem. 🔍 **Data**: Access Redis database info. 🚫 **Auth**: None required! (PR:N).

⚡ **Threshold**: LOW. 🌐 **Network**: Remote (AV:N). 🔑 **Auth**: None (PR:N). 🧠 **Complexity**: Low (AC:L). 👤 **User Interaction**: None (UI:N). 🎯 **Easy to exploit for anyone on the network.

📜 **Public Exp**: No PoC listed in data. 🌍 **Wild Exp**: Unknown status. 📢 **Advisory**: Cisco published security advisory (2022-05-20).…

🔍 **Check**: Scan for TCP Port 6379. 📡 **Target**: Cisco IOS XR devices. 🛠️ **Tool**: Use port scanners to detect open Redis ports. ⚠️ **Flag**: If port 6379 is open & unauthenticated, you are vulnerable.

🩹 **Fix**: Yes, Official Patch Available. 📅 **Date**: Advisory published May 2022. 🔗 **Source**: Cisco Security Advisory (cisco-sa-iosxr-redis-ABJyE5xK). ✅ **Action**: Update IOS XR software immediately.

🚧 **Workaround**: Block TCP 6379 via ACL/Firewall. 🚫 **Restrict**: Prevent external access to NOSi container. 🛡️ **Mitigate**: Close the port if patching is delayed. 🔒 **Limit**: Reduce attack surface significantly.

🔥 **Urgency**: HIGH. 📉 **CVSS**: L/C:L/I:L (Confidentiality/Integrity loss). 🚨 **Risk**: Unauthenticated access is critical. 🏃 **Action**: Patch ASAP or apply network restrictions. ⏳ **Time**: Do not delay remediation.