CVE-2023-29487
📋 TL;DR
This CVE describes a denial-of-service vulnerability in Heimdal Thor agent's Threat To Process Correlation module. Attackers can exploit this to cause service disruption on affected endpoints. Heimdal disputes this classification, stating it's not a vulnerability but rather a missing feature in DNS logging.
💻 Affected Systems
- Heimdal Thor agent
📦 What is this software?
Thor by Heimdalsecurity
Thor by Heimdalsecurity
⚠️ Risk & Real-World Impact
Worst Case
Complete disruption of Heimdal Thor agent functionality, potentially disabling security monitoring and threat prevention capabilities on endpoints.
Likely Case
Intermittent service disruption or performance degradation of the Thor agent's threat prevention features.
If Mitigated
Minimal impact if the Threat To Process Correlation module is disabled or if affected versions are not in use.
🎯 Exploit Status
Exploitation details are not publicly documented. The vendor disputes the vulnerability classification entirely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
Heimdal does not acknowledge this as a vulnerability. Consider upgrading to latest versions as general security practice.
🔧 Temporary Workarounds
Disable Threat To Process Correlation
allTurn off the vulnerable module in Heimdal Thor agent configuration
Specific commands depend on Heimdal management console or configuration files
🧯 If You Can't Patch
- Disable the Threat To Process Correlation feature in Heimdal Thor agent
- Implement network segmentation to limit access to endpoints running vulnerable versions
🔍 How to Verify
Check if Vulnerable:
Check Heimdal Thor agent version: Windows - Check installed programs list, macOS - Check application version in About dialogCheck Version:
Windows: wmic product get name,version | findstr Heimdal, macOS: system_profiler SPApplicationsDataType | grep -A 5 HeimdalVerify Fix Applied:
Verify Threat To Process Correlation module is disabled in agent configuration📡 Detection & Monitoring
Log Indicators:
- Heimdal Thor agent service crashes or restarts
- DNS security module errors in Heimdal logs
Network Indicators:
- Unusual DNS query patterns from endpoints with Heimdal agent
SIEM Query:
source="heimdal_logs" AND (event_type="service_crash" OR event_type="module_error")