CVE-2023-31414
📋 TL;DR
CVE-2023-31414 allows arbitrary code execution in Kibana when an attacker with write access to configuration files injects malicious JavaScript payloads. This vulnerability affects Kibana versions 8.0.0 through 8.7.0, potentially enabling attackers to execute commands on the host system with Kibana process permissions.
💻 Affected Systems
- Kibana
📦 What is this software?
Kibana by Elastic
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining shell access and executing arbitrary commands as the Kibana user, potentially leading to data exfiltration, lateral movement, or ransomware deployment.
Likely Case
Limited code execution within Kibana context leading to data manipulation, privilege escalation, or installation of persistence mechanisms.
If Mitigated
No impact if proper access controls prevent unauthorized configuration file modifications and systems are patched.
🎯 Exploit Status
Exploitation requires write access to configuration files, making it more likely in environments with poor access controls or compromised accounts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.7.1 and later
Vendor Advisory: https://discuss.elastic.co/t/kibana-8-7-1-security-updates/332330
Restart Required: Yes
Instructions:
1. Backup Kibana configuration and data. 2. Upgrade to Kibana 8.7.1 or later. 3. Restart Kibana service. 4. Verify upgrade completed successfully.
🔧 Temporary Workarounds
Restrict Configuration File Access
linuxLimit write access to kibana.yml and environment configuration files to authorized administrators only.
chmod 600 /etc/kibana/kibana.yml
chown kibana:kibana /etc/kibana/kibana.yml
Network Segmentation
allRestrict network access to Kibana administration interfaces to trusted IP ranges only.
🧯 If You Can't Patch
- Implement strict access controls on Kibana configuration files (read-only for non-admin users)
- Monitor configuration files for unauthorized changes using file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Check Kibana version with 'kibana --version' or via Kibana UI > Management > Stack Management > AboutCheck Version:
kibana --versionVerify Fix Applied:
Confirm version is 8.7.1 or higher and verify configuration files haven't been modified with malicious payloads📡 Detection & Monitoring
Log Indicators:
- Unusual configuration file modifications
- Suspicious JavaScript execution in Kibana logs
- Unexpected process spawns from Kibana
Network Indicators:
- Unusual outbound connections from Kibana process
- Command and control traffic patterns
SIEM Query:
source="kibana.log" AND ("configuration modified" OR "unexpected execution" OR "process.spawn")