CVE-2023-5830
📋 TL;DR
This critical vulnerability in ColumbiaSoft Document Locator allows attackers to bypass authentication via manipulation of the Server parameter in the /api/authentication/login endpoint. Remote attackers can potentially gain unauthorized access to the WebTools component. Organizations using vulnerable versions of Document Locator are affected.
💻 Affected Systems
- ColumbiaSoft Document Locator
📦 What is this software?
Document Locator by Documentlocator
Document Locator by Documentlocator
Document Locator by Documentlocator
Document Locator by Documentlocator
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to sensitive documents, configuration data, and potential lateral movement within the network.
Likely Case
Unauthorized access to the Document Locator system, potentially exposing sensitive business documents and metadata.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
The vulnerability involves manipulating the Server parameter in authentication requests, suggesting relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.2 SP4 or 2021.1
Vendor Advisory: https://vuldb.com/?ctiid.243729
Restart Required: Yes
Instructions:
1. Download the latest version from ColumbiaSoft. 2. Backup current installation and data. 3. Run the installer for version 7.2 SP4 or 2021.1. 4. Restart the Document Locator services. 5. Verify the update completed successfully.
🔧 Temporary Workarounds
Network Access Restriction
windowsRestrict network access to the Document Locator WebTools component to only trusted IP addresses or internal networks.
Use Windows Firewall: New-InboundFirewallRule -DisplayName 'Block Document Locator External' -Direction Inbound -Protocol TCP -LocalPort 80,443 -RemoteAddress 'NotLocalSubnet' -Action Block
Web Application Firewall Rule
allImplement WAF rules to block suspicious authentication requests or restrict access to the /api/authentication/login endpoint.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Document Locator from untrusted networks
- Enable detailed authentication logging and monitor for suspicious login attempts
🔍 How to Verify
Check if Vulnerable:
Check Document Locator version in the application interface or registry: HKEY_LOCAL_MACHINE\SOFTWARE\ColumbiaSoft\Document Locator\VersionCheck Version:
reg query "HKLM\SOFTWARE\ColumbiaSoft\Document Locator" /v VersionVerify Fix Applied:
Verify the version shows 7.2.4.x (for SP4) or 2021.1.x and test authentication functionality📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts with unusual Server parameters
- Successful logins from unexpected IP addresses
- Multiple authentication requests in short timeframes
Network Indicators:
- HTTP POST requests to /api/authentication/login with manipulated Server parameter
- Unusual traffic patterns to the Document Locator web interface
SIEM Query:
source="document_locator.log" AND (uri_path="/api/authentication/login" AND (http_method="POST" AND (param_Server!="expected_server" OR status_code=200 AND user_agent="malicious")))