CVE-2018-25111
📋 TL;DR
This vulnerability in django-helpdesk allows sensitive data exposure due to improper file permission settings. The os.umask(0) call in models.py creates files with overly permissive permissions, potentially exposing sensitive data to unauthorized users. All systems running django-helpdesk versions before 1.0.0 are affected.
💻 Affected Systems
- django-helpdesk
📦 What is this software?
Django Helpdesk by Django Helpdesk Project
⚠️ Risk & Real-World Impact
Worst Case
Sensitive helpdesk data including user information, tickets, and attachments becomes accessible to unauthorized users or processes on the system, potentially leading to data breaches.
Likely Case
Files created by the application have overly permissive permissions, allowing other users or processes on the same system to read sensitive data they shouldn't have access to.
If Mitigated
With proper file system permissions and access controls, the impact is limited to potential information disclosure within the application's own data directory.
🎯 Exploit Status
Exploitation requires local access to the system where django-helpdesk is running. Attackers can simply read files that should have been protected by proper permissions.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.0 and later
Vendor Advisory: https://github.com/django-helpdesk/django-helpdesk/releases/tag/v1.0.0
Restart Required: Yes
Instructions:
1. Backup your current installation and database. 2. Update django-helpdesk to version 1.0.0 or later using pip: 'pip install django-helpdesk>=1.0.0'. 3. Restart your Django application server. 4. Verify the fix by checking file permissions on newly created files.
🔧 Temporary Workarounds
Manual file permission correction
linuxManually set proper file permissions on existing files and directories created by django-helpdesk
find /path/to/django-helpdesk/files -type f -exec chmod 640 {} \;
find /path/to/django-helpdesk/files -type d -exec chmod 750 {} \;
🧯 If You Can't Patch
- Implement strict file system access controls and limit user access to the django-helpdesk data directory
- Run django-helpdesk in a containerized environment with restricted file system access
🔍 How to Verify
Check if Vulnerable:
Check if os.umask(0) exists in your django-helpdesk installation's models.py fileCheck Version:
pip show django-helpdesk | grep VersionVerify Fix Applied:
Verify that newly created files by django-helpdesk have appropriate permissions (typically 640 for files, 750 for directories)📡 Detection & Monitoring
Log Indicators:
- File access attempts from unauthorized users or processes
- Permission denied errors in application logs
Network Indicators:
- No direct network indicators as this is a local file system vulnerability
SIEM Query:
No specific SIEM query as this is a local file permission issue