CVE-2022-26148
📋 TL;DR
This vulnerability exposes Zabbix account passwords in Grafana's HTML source code when integrated with Zabbix. Attackers can discover credentials by viewing page source, potentially compromising the Zabbix monitoring system. Affects Grafana users with Zabbix integration enabled.
💻 Affected Systems
- Grafana
📦 What is this software?
Grafana by Grafana
Storage by Redhat
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of Zabbix monitoring infrastructure leading to credential theft, data exfiltration, and lateral movement to other systems.
Likely Case
Unauthorized access to Zabbix monitoring data, configuration tampering, and potential privilege escalation within the monitoring environment.
If Mitigated
Limited to information disclosure without further exploitation if proper network segmentation and access controls are in place.
🎯 Exploit Status
Exploitation requires only viewing HTML source code, making it trivial for any user with access to the Grafana interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Grafana 7.3.5 and later
Vendor Advisory: https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-3-5/
Restart Required: Yes
Instructions:
1. Backup Grafana configuration and data. 2. Upgrade to Grafana 7.3.5 or later. 3. Restart Grafana service. 4. Verify Zabbix integration still functions correctly.
🔧 Temporary Workarounds
Disable Zabbix Integration
allTemporarily disable Zabbix data source integration in Grafana until patching is possible.
Edit Grafana configuration to remove or disable Zabbix data sources
Restrict Grafana Access
allImplement strict network access controls to limit who can access the Grafana web interface.
Configure firewall rules to restrict Grafana port (default 3000) access to authorized IPs only
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Grafana from sensitive systems
- Rotate all Zabbix account passwords and implement multi-factor authentication
🔍 How to Verify
Check if Vulnerable:
Access Grafana web interface, navigate to Zabbix data source configuration, view page source (Ctrl+U), search for 'password' in api_jsonrpc.php content.Check Version:
grafana-server -v (Linux) or check Grafana web interface admin sectionVerify Fix Applied:
After upgrade, repeat the vulnerable check - passwords should no longer appear in HTML source. Verify Grafana version is 7.3.5 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts to Zabbix from Grafana server IP
- Multiple failed login attempts to Grafana interface
Network Indicators:
- Unusual outbound connections from Grafana server to Zabbix on non-standard ports
- HTTP requests to api_jsonrpc.php with suspicious parameters
SIEM Query:
source="grafana.log" AND ("password" OR "api_jsonrpc.php") OR source="zabbix.log" AND ("authentication failure" FROM grafana_ip)