CVE-2024-11839
📋 TL;DR
This CVE describes a deserialization vulnerability in PlexTrac's Runbooks modules that allows attackers to inject malicious objects and write arbitrary files to the system. It affects PlexTrac installations from version 1.61.3 up to (but not including) 2.8.1. Organizations using vulnerable versions of PlexTrac are at risk of compromise.
💻 Affected Systems
- PlexTrac
📦 What is this software?
Plextrac by Plextrac
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to data exfiltration, ransomware deployment, or complete control over the PlexTrac instance and potentially underlying infrastructure.
Likely Case
Arbitrary file writes enabling web shell installation, credential theft, or lateral movement within the network.
If Mitigated
Limited impact due to network segmentation, strict access controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Requires access to Runbooks functionality; authentication status unclear from available information.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.8.1 or later (2.11.0 recommended)
Vendor Advisory: https://docs.plextrac.com/plextrac-documentation/master/security-advisories#release-2.11.0
Restart Required: Yes
Instructions:
1. Backup PlexTrac data and configuration. 2. Upgrade to PlexTrac version 2.8.1 or later. 3. Restart PlexTrac services. 4. Verify functionality post-upgrade.
🔧 Temporary Workarounds
Disable Runbooks Modules
allTemporarily disable or restrict access to Runbooks functionality if not essential.
Network Segmentation
allRestrict network access to PlexTrac instance to authorized users only.
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the PlexTrac instance.
- Enable detailed logging and monitoring for suspicious deserialization attempts or file writes.
🔍 How to Verify
Check if Vulnerable:
Check PlexTrac version via web interface or configuration files; versions 1.61.3 to 2.8.0 are vulnerable.Check Version:
Check PlexTrac web interface admin panel or configuration files for version number.Verify Fix Applied:
Confirm version is 2.8.1 or later and test Runbooks functionality for anomalies.📡 Detection & Monitoring
Log Indicators:
- Unusual deserialization errors
- Unexpected file write operations in PlexTrac logs
- Access to Runbooks modules from suspicious IPs
Network Indicators:
- HTTP requests to Runbooks endpoints with serialized data payloads
- Outbound connections from PlexTrac server to unknown destinations
SIEM Query:
source="plextrac" AND (event="deserialization" OR event="file_write")