CVE-2024-38206
📋 TL;DR
An authenticated attacker can bypass SSRF protection in Microsoft Copilot Studio to make unauthorized requests to internal network resources, potentially leaking sensitive information. This affects organizations using Microsoft Copilot Studio with authenticated user access.
💻 Affected Systems
- Microsoft Copilot Studio
📦 What is this software?
Copilot Studio by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Attacker accesses internal systems, steals credentials, exfiltrates sensitive data, or pivots to other critical infrastructure.
Likely Case
Information disclosure from internal services, metadata exposure, or reconnaissance of internal network topology.
If Mitigated
Limited impact due to network segmentation, strict authentication controls, and monitoring of outbound requests.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of SSRF bypass techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific version.
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38206
Restart Required: No
Instructions:
1. Review Microsoft advisory. 2. Apply the latest security update for Microsoft Copilot Studio. 3. Verify the update is applied successfully.
🔧 Temporary Workarounds
Network Segmentation
allRestrict outbound network access from Copilot Studio to only necessary internal services.
Enhanced Authentication
allImplement multi-factor authentication and strict access controls for Copilot Studio users.
🧯 If You Can't Patch
- Monitor and log all outbound requests from Copilot Studio for suspicious activity.
- Implement network-level restrictions to block unauthorized internal requests.
🔍 How to Verify
Check if Vulnerable:
Check if your Microsoft Copilot Studio version is listed in the Microsoft advisory as affected.Check Version:
Check within Microsoft Copilot Studio admin portal or via PowerShell: Get-Module -Name Microsoft.CopilotStudioVerify Fix Applied:
Confirm the applied patch version matches or exceeds the fixed version in the advisory.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from Copilot Studio to internal IPs
- Failed authentication attempts followed by SSRF-like requests
Network Indicators:
- Unexpected traffic from Copilot Studio to internal services not typically accessed
SIEM Query:
source="copilot-studio" AND (http_request_method="GET" OR "POST") AND dest_ip=~"10.*|192.168.*|172.16.*" AND NOT dest_ip IN allowed_ips