CVE-2024-38139
📋 TL;DR
CVE-2024-38139 is an improper authentication vulnerability in Microsoft Dataverse that allows authenticated attackers to elevate privileges over a network. This affects organizations using Microsoft Dataverse, particularly those with Power Platform or Dynamics 365 deployments. Attackers could gain unauthorized access to sensitive data or administrative functions.
💻 Affected Systems
- Microsoft Dataverse
- Microsoft Power Platform
- Microsoft Dynamics 365
📦 What is this software?
Dataverse by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Dataverse environment, allowing attackers to access, modify, or delete all data, create administrative accounts, and potentially pivot to connected systems.
Likely Case
Unauthorized access to sensitive business data, privilege escalation to administrative roles, and potential data exfiltration or manipulation.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring that detects anomalous privilege escalation attempts.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of Dataverse environment. No public exploit code available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for specific patch versions
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38139
Restart Required: Yes
Instructions:
1. Review Microsoft Security Update Guide for CVE-2024-38139. 2. Apply the latest security updates for Microsoft Dataverse/Power Platform/Dynamics 365. 3. Restart affected services. 4. Verify patch installation through version checks.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Dataverse environments to only trusted sources
Enhanced Authentication Monitoring
allImplement strict monitoring for authentication and privilege escalation events
🧯 If You Can't Patch
- Implement strict principle of least privilege for all Dataverse user accounts
- Enable comprehensive logging and monitoring for authentication and privilege escalation events
🔍 How to Verify
Check if Vulnerable:
Check Dataverse/Power Platform/Dynamics 365 version against Microsoft's patched versions in the security advisoryCheck Version:
Check through Power Platform admin center or Dynamics 365 admin center for version informationVerify Fix Applied:
Verify installed version matches or exceeds the patched version specified by Microsoft📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation events
- Multiple failed authentication attempts followed by successful authentication
- Access to administrative functions from non-admin accounts
Network Indicators:
- Unusual authentication patterns to Dataverse endpoints
- Traffic to Dataverse from unexpected sources
SIEM Query:
source="dataverse" AND (event_type="privilege_escalation" OR auth_result="success" AND user_role_change="true")