CVE-2024-21683
📋 TL;DR
This is a high-severity remote code execution vulnerability in Confluence Data Center and Server that allows authenticated attackers to execute arbitrary code on affected systems. It affects Confluence versions starting from 5.2 and has significant impact on confidentiality, integrity, and availability. Organizations running vulnerable versions of Confluence are at risk.
💻 Affected Systems
- Confluence Data Center
- Confluence Server
📦 What is this software?
Crucible by Atlassian
Fisheye by Atlassian
Jira Server by Atlassian
Jira Server by Atlassian
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attacker to execute arbitrary code, steal sensitive data, modify or delete content, and potentially pivot to other systems in the network.
Likely Case
Unauthorized access to Confluence data, modification of pages and configurations, installation of backdoors, and potential lateral movement within the network.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place, though the vulnerability still presents significant risk.
🎯 Exploit Status
The vulnerability was found internally by Atlassian, and exploitation requires authenticated access but no special privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version or specified fixed versions per Atlassian advisory
Vendor Advisory: https://confluence.atlassian.com/pages/viewpage.action?pageId=1409286211
Restart Required: Yes
Instructions:
1. Check current Confluence version. 2. Download latest version from Atlassian download center. 3. Backup current installation and data. 4. Install the update following Atlassian upgrade documentation. 5. Restart Confluence services.
🔧 Temporary Workarounds
Restrict network access
allLimit access to Confluence instances to only trusted networks and IP addresses
Enforce strong authentication
allImplement multi-factor authentication and strong password policies for all Confluence users
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to Confluence instances
- Enhance monitoring and logging for suspicious activities and implement immediate alerting for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check Confluence version against affected version range (5.2 and later)Check Version:
Check Confluence administration interface or view confluence/WEB-INF/classes/build.properties fileVerify Fix Applied:
Verify Confluence version is updated to a fixed version specified in Atlassian advisory📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns
- Unexpected process execution
- Suspicious file modifications
- Unusual network connections from Confluence server
Network Indicators:
- Unexpected outbound connections from Confluence server
- Suspicious payloads in HTTP requests to Confluence
SIEM Query:
source="confluence" AND (event_type="process_execution" OR event_type="file_modification") AND user!="expected_service_accounts"