CVE-2024-36991
📋 TL;DR
This vulnerability allows attackers to perform path traversal attacks on the /modules/messaging/ endpoint in Splunk Enterprise on Windows. This could enable unauthorized access to files outside the intended directory. Only Splunk Enterprise installations on Windows operating systems running vulnerable versions are affected.
💻 Affected Systems
- Splunk Enterprise
📦 What is this software?
Splunk by Splunk
Splunk by Splunk
Splunk by Splunk
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read sensitive system files, potentially obtaining credentials, configuration data, or other confidential information stored on the Windows server.
Likely Case
Attackers could access Splunk configuration files, logs, or other application data that could be used for further exploitation or information gathering.
If Mitigated
With proper network segmentation and access controls, the impact would be limited to the Splunk application directory and isolated from critical system files.
🎯 Exploit Status
The vulnerability affects a specific endpoint and requires Windows OS. No public exploit code has been identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.2.2, 9.1.5, or 9.0.10
Vendor Advisory: https://advisory.splunk.com/advisories/SVD-2024-0711
Restart Required: Yes
Instructions:
1. Download the appropriate patch version from Splunk's official website. 2. Backup your Splunk configuration and data. 3. Stop Splunk services. 4. Install the patch. 5. Restart Splunk services. 6. Verify the update was successful.
🔧 Temporary Workarounds
Restrict Access to /modules/messaging/ Endpoint
allUse web application firewall or network controls to block or restrict access to the vulnerable endpoint
Network Segmentation
allIsolate Splunk servers from other critical systems to limit potential lateral movement
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the Splunk server
- Monitor the /modules/messaging/ endpoint for suspicious access patterns and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check Splunk version and confirm it's running on Windows with a version below 9.2.2, 9.1.5, or 9.0.10Check Version:
splunk versionVerify Fix Applied:
Verify Splunk version shows 9.2.2, 9.1.5, or 9.0.10 or higher after patching📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to /modules/messaging/ endpoint
- Requests with directory traversal patterns (../, ..\) in the URL
Network Indicators:
- HTTP requests to /modules/messaging/ with path traversal sequences
SIEM Query:
source="*splunk*" OR source="*web*" (url="*/modules/messaging/*" AND (url="*../*" OR url="*..\*"))