CVE-2024-21677
📋 TL;DR
This is a high-severity path traversal vulnerability (CWE-22) in Confluence Data Center and Server that allows unauthenticated attackers to access or manipulate files outside intended directories. It affects Confluence versions starting from 6.13.0, putting organizations using these versions at risk of data exposure or system compromise.
💻 Affected Systems
- Confluence Data Center
- Confluence Server
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary file read/write leading to sensitive data exposure, privilege escalation, or remote code execution.
Likely Case
Unauthorized access to configuration files, source code, or sensitive data stored on the Confluence server.
If Mitigated
Limited impact with proper network segmentation, file system permissions, and monitoring in place.
🎯 Exploit Status
CVSS 8.8 indicates high exploitability. Unauthenticated nature lowers barrier to exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version or specified fixed versions in release notes
Vendor Advisory: https://confluence.atlassian.com/pages/viewpage.action?pageId=1369444862
Restart Required: Yes
Instructions:
1. Backup your Confluence instance. 2. Download latest version from Atlassian download center. 3. Follow upgrade procedures in Confluence documentation. 4. Restart Confluence service. 5. Verify upgrade completed successfully.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to Confluence instances to trusted networks only
Web Application Firewall Rules
allImplement WAF rules to block path traversal patterns
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to Confluence instances
- Enable detailed logging and monitoring for suspicious file access patterns
🔍 How to Verify
Check if Vulnerable:
Check Confluence version via Administration → General Configuration or via system info pageCheck Version:
Check Confluence version via web interface or examine confluence.cfg.xml fileVerify Fix Applied:
Verify version is updated to patched release and test path traversal attempts return appropriate errors📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns
- Requests with ../ sequences
- Access to files outside webroot
Network Indicators:
- Multiple failed path traversal attempts
- Unusual file download patterns
SIEM Query:
web.url:*../* AND (dst.port:8090 OR dst.port:8443)