CVE-2025-1035
📋 TL;DR
This path traversal vulnerability in Komtera Technologies KLog Server allows attackers to manipulate web input to access files outside the intended directory. Attackers could potentially read, modify, or delete sensitive system files. All KLog Server installations before version 3.1.1 are affected.
💻 Affected Systems
- Komtera Technologies KLog Server
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through reading sensitive files like /etc/passwd, /etc/shadow, or application configuration files containing credentials, potentially leading to privilege escalation or data exfiltration.
Likely Case
Unauthorized reading of sensitive log files, configuration files, or other application data stored on the server filesystem.
If Mitigated
Limited impact with proper file permissions, web application firewalls, and input validation in place, potentially blocking traversal attempts.
🎯 Exploit Status
Path traversal vulnerabilities typically have low exploitation complexity. The advisory suggests manipulation of web input, indicating likely unauthenticated access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.1
Vendor Advisory: https://www.klogserver.com/surum-notlari/3-1-1/
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Download KLog Server version 3.1.1 from official vendor site. 3. Stop the KLog Server service. 4. Install/upgrade to version 3.1.1. 5. Restart the KLog Server service. 6. Verify successful upgrade and functionality.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allImplement WAF rules to block path traversal patterns like '../', '..\', directory traversal sequences, and null bytes in URLs.
File Permission Restrictions
linuxRun KLog Server with minimal privileges and restrict filesystem access to only necessary directories using chroot, containers, or strict file permissions.
chmod 750 /path/to/klog/data
chown kloguser:kloggroup /path/to/klog/data
🧯 If You Can't Patch
- Implement network segmentation to restrict access to KLog Server only from trusted sources
- Deploy a reverse proxy with strict input validation and path sanitization rules
🔍 How to Verify
Check if Vulnerable:
Check KLog Server version via web interface or configuration files. If version is earlier than 3.1.1, system is vulnerable.Check Version:
Check web interface or configuration file for version information. No standard CLI command available.Verify Fix Applied:
After patching, verify version shows 3.1.1 or later. Test path traversal attempts should be blocked with proper error messages.📡 Detection & Monitoring
Log Indicators:
- Multiple failed attempts accessing paths with '../' sequences
- Unusual file access patterns outside normal log directories
- HTTP 400/403 errors with traversal patterns in URLs
Network Indicators:
- HTTP requests containing '../', '..\', or encoded traversal sequences
- Requests attempting to access known sensitive file paths
SIEM Query:
web.url CONTAINS "../" OR web.url CONTAINS "..\\" OR web.url CONTAINS "%2e%2e%2f"