CVE-2023-24188
📋 TL;DR
CVE-2023-24188 is a directory traversal vulnerability in ureport v2.2.9 that allows attackers to delete arbitrary files on the server by exploiting the deletion function. This affects all systems running the vulnerable version of ureport, potentially leading to data loss, service disruption, or system compromise.
💻 Affected Systems
- ureport
📦 What is this software?
Ureport by Ureport Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through deletion of critical system files, leading to OS corruption, data destruction, and permanent service unavailability.
Likely Case
Deletion of application files, configuration files, or user data causing service disruption, data loss, and potential privilege escalation.
If Mitigated
Limited to deletion of non-critical files within application directory if proper file permissions and input validation are enforced.
🎯 Exploit Status
Exploitation requires access to the deletion function, which may require authentication. The directory traversal technique is well-known and easy to implement.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check latest version from official repository (likely v2.3.0 or higher)
Vendor Advisory: https://github.com/youseries/ureport
Restart Required: Yes
Instructions:
1. Backup current ureport installation and data. 2. Download latest version from official repository. 3. Replace vulnerable files with patched version. 4. Restart ureport service. 5. Verify fix by testing deletion function with traversal attempts.
🔧 Temporary Workarounds
Input Validation Filter
allImplement strict input validation to reject any file paths containing directory traversal sequences (../, ..\)
# Add input validation in deletion function code
# Example: if 'filename' contains '..' or '/' outside allowed paths, reject request
File Permission Restriction
linuxRun ureport with minimal privileges and restrict file system access to application directory only
# Linux: chown -R ureport:ureport /path/to/ureport
# Set appropriate directory permissions: chmod 750 /path/to/ureport
🧯 If You Can't Patch
- Disable or restrict access to the deletion function entirely
- Implement web application firewall (WAF) rules to block directory traversal patterns
🔍 How to Verify
Check if Vulnerable:
Check ureport version: if running v2.2.9, it's vulnerable. Test by attempting to delete a file with traversal path (e.g., ../../etc/passwd) if safe testing environment available.Check Version:
# Check ureport version in application interface or configuration filesVerify Fix Applied:
After patching, attempt the same traversal attack; it should be rejected. Check that normal file deletion within allowed directories still works.📡 Detection & Monitoring
Log Indicators:
- Multiple failed deletion attempts with traversal patterns
- Successful deletion of files outside application directory
- Error logs showing path validation failures
Network Indicators:
- HTTP requests to deletion endpoint with ../ patterns in parameters
- Unusual file deletion patterns from single source
SIEM Query:
source="ureport.log" AND ("..\" OR "../" OR "directory traversal") AND action="delete"