CVE-2025-62790
📋 TL;DR
A NULL pointer dereference vulnerability in Wazuh's analysisd component allows a compromised agent to crash the manager by sending a specially crafted message. This causes denial of service, making threat detection unavailable. Organizations running Wazuh versions before 4.11.0 are affected.
💻 Affected Systems
- Wazuh
📦 What is this software?
Wazuh by Wazuh
⚠️ Risk & Real-World Impact
Worst Case
Analysisd crashes repeatedly, causing complete loss of threat detection and response capabilities until service is restored.
Likely Case
Intermittent analysisd crashes leading to gaps in security monitoring and alerting.
If Mitigated
Minimal impact with proper network segmentation and agent integrity controls in place.
🎯 Exploit Status
Requires agent compromise first, then simple crafted message to trigger crash.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.11.0
Vendor Advisory: https://github.com/wazuh/wazuh/security/advisories/GHSA-9xj3-vc52-48p9
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Stop Wazuh services. 3. Upgrade to Wazuh 4.11.0 using package manager or source. 4. Restart all Wazuh services.
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict agent-manager communication to trusted networks only
iptables -A INPUT -s <agent_subnet> -p tcp --dport 1514 -j ACCEPT
iptables -A INPUT -p tcp --dport 1514 -j DROP
🧯 If You Can't Patch
- Implement strict agent integrity monitoring and alerting
- Deploy network monitoring for abnormal agent-manager communication patterns
🔍 How to Verify
Check if Vulnerable:
Check Wazuh version: if version < 4.11.0, system is vulnerableCheck Version:
wazuh-manager -V | grep 'Wazuh v'Verify Fix Applied:
Confirm version is 4.11.0 or higher and analysisd is running without crashes📡 Detection & Monitoring
Log Indicators:
- analysisd crash logs in /var/ossec/logs/ossec.log
- Segmentation fault errors in system logs
Network Indicators:
- Unusual agent communication patterns
- Multiple connection attempts from single agent
SIEM Query:
source="ossec.log" AND "analysisd" AND ("segmentation fault" OR "crash" OR "abnormal termination")