CVE-2024-21401
📋 TL;DR
This vulnerability in Microsoft Entra Jira Single-Sign-On Plugin allows attackers to elevate privileges, potentially gaining unauthorized access to Jira instances. Organizations using affected versions of the Microsoft Entra Jira SSO plugin are at risk.
💻 Affected Systems
- Microsoft Entra Jira Single-Sign-On Plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Jira, allowing data theft, system compromise, and lateral movement to connected systems.
Likely Case
Unauthorized users gain elevated privileges within Jira, accessing sensitive data and modifying configurations.
If Mitigated
With proper network segmentation and monitoring, impact is limited to Jira instance only.
🎯 Exploit Status
CVSS 9.8 suggests critical severity with low attack complexity
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Microsoft Security Update Guide for latest version
Vendor Advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21401
Restart Required: Yes
Instructions:
1. Access Jira administration console. 2. Navigate to plugin management. 3. Update Microsoft Entra SSO plugin to latest version. 4. Restart Jira service.
🔧 Temporary Workarounds
Disable plugin temporarily
allTemporarily disable Microsoft Entra SSO plugin until patched
Navigate to Jira Admin > Manage apps > Disable Microsoft Entra SSO plugin
Restrict network access
allLimit Jira access to trusted networks only
Configure firewall rules to restrict Jira port access
🧯 If You Can't Patch
- Implement strict network segmentation for Jira instance
- Enable detailed authentication logging and monitor for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check plugin version in Jira Admin > Manage apps > Microsoft Entra SSO pluginCheck Version:
Check Jira plugin management interface for version detailsVerify Fix Applied:
Verify plugin version matches latest from Microsoft advisory and test SSO functionality📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege changes in Jira audit logs
- Authentication anomalies in SSO logs
- Multiple failed login attempts followed by successful admin access
Network Indicators:
- Unusual authentication traffic patterns to Jira SSO endpoints
- Requests to Jira admin interfaces from unexpected sources
SIEM Query:
source="jira.logs" AND (event="privilege_change" OR event="admin_access") AND user NOT IN allowed_admins