CVE-2025-62788
📋 TL;DR
This is a use-after-free vulnerability in Wazuh's w_copy_event_for_log() function that allows compromised agents to send specially crafted messages to the manager. An attacker can potentially corrupt memory and compromise the integrity of the Wazuh manager application. This affects all Wazuh deployments with agents prior to version 4.11.0.
💻 Affected Systems
- Wazuh
📦 What is this software?
Wazuh by Wazuh
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the Wazuh manager leading to data corruption, denial of service, or potential remote code execution through memory corruption.
Likely Case
Application instability, crashes, or data corruption in the Wazuh manager when processing malicious agent messages.
If Mitigated
Limited impact if proper network segmentation and agent authentication controls prevent unauthorized agents from communicating with the manager.
🎯 Exploit Status
Exploitation requires a compromised agent or ability to send crafted messages to the manager. The advisory suggests this could lead to integrity compromise through memory corruption.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.11.0
Vendor Advisory: https://github.com/wazuh/wazuh/security/advisories/GHSA-qjcw-fjvh-8q4g
Restart Required: Yes
Instructions:
1. Backup your Wazuh configuration and data. 2. Update Wazuh manager to version 4.11.0 or later using your package manager. 3. Restart the Wazuh manager service. 4. Update all agents to compatible versions if required.
🔧 Temporary Workarounds
Network Segmentation
allRestrict agent-to-manager communication to trusted networks only
Agent Authentication Enforcement
allEnsure all agents are properly authenticated and monitor for unauthorized agent connections
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Wazuh manager from potentially compromised agents
- Monitor agent communications for anomalous patterns and implement strict agent authentication controls
🔍 How to Verify
Check if Vulnerable:
Check Wazuh manager version: wazuh-manager --version or check package version via package managerCheck Version:
wazuh-manager --versionVerify Fix Applied:
Verify version is 4.11.0 or higher and check that manager service is running without errors📡 Detection & Monitoring
Log Indicators:
- Wazuh manager crashes or segmentation faults
- Memory corruption errors in system logs
- Unusual agent connection patterns
Network Indicators:
- Unusual agent-to-manager message patterns
- Suspicious agent connections
SIEM Query:
source="wazuh-manager" AND (error OR crash OR segmentation OR "use-after-free")