CVE-2024-6400
📋 TL;DR
This vulnerability in Finrota Netahsilat allows attackers to retrieve sensitive information stored in cleartext, bypass authentication, inject IMAP/SMTP commands, and collect data from common resource locations. It affects all Finrota Netahsilat users running vulnerable versions. The vulnerability exposes sensitive data and could lead to complete system compromise.
💻 Affected Systems
- Finrota Netahsilat
📦 What is this software?
Finrota by Finrota
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover, data exfiltration of all sensitive information, unauthorized access to email systems via command injection, and authentication bypass allowing administrative access.
Likely Case
Sensitive data exposure including credentials and personal information, unauthorized access to application functions, and potential email system compromise.
If Mitigated
Limited data exposure if proper encryption and access controls are implemented, but authentication bypass and command injection risks remain.
🎯 Exploit Status
Multiple attack vectors including cleartext data retrieval and authentication bypass suggest relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.21.10, 1.23.01, 1.23.08, 1.23.11, or 1.24.03
Vendor Advisory: https://www.usom.gov.tr/bildirim/tr-24-1611
Restart Required: Yes
Instructions:
1. Download the latest patched version from Finrota. 2. Backup current configuration and data. 3. Stop the Netahsilat service. 4. Install the patched version. 5. Restart the service. 6. Verify functionality.
🔧 Temporary Workarounds
Network Segmentation
linuxIsolate Finrota Netahsilat from internet and restrict internal access
iptables -A INPUT -p tcp --dport [Netahsilat_port] -s [trusted_network] -j ACCEPT
iptables -A INPUT -p tcp --dport [Netahsilat_port] -j DROP
Disable External Email Functions
allTemporarily disable IMAP/SMTP functionality to prevent command injection
# Edit configuration to disable IMAP/SMTP services
# Set imap_enabled = false and smtp_enabled = false in config file
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Enable comprehensive logging and monitoring for suspicious activities
🔍 How to Verify
Check if Vulnerable:
Check Netahsilat version against vulnerable versions list. Examine configuration for cleartext storage settings.Check Version:
# Check version in Netahsilat admin interface or configuration filesVerify Fix Applied:
Verify installed version is 1.21.10, 1.23.01, 1.23.08, 1.23.11, or 1.24.03. Test authentication bypass and data query functions.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts
- Multiple failed login attempts followed by success
- Unexpected data query patterns
- IMAP/SMTP command errors
Network Indicators:
- Unusual outbound connections from Netahsilat server
- Traffic to unexpected ports
- Large data transfers
SIEM Query:
source="netahsilat.log" AND (event_type="auth_failure" OR event_type="data_query" OR event_type="email_command")