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CVE-2020-29227

9.8 CRITICAL
Remote Code Execution

📋 TL;DR

CVE-2020-29227 is an unauthenticated local file inclusion vulnerability in Car Rental Management System 1.0 that allows attackers to include arbitrary files via the 'page' parameter in /index.php, potentially leading to remote code execution. This affects all deployments of Car Rental Management System 1.0 that are exposed to untrusted networks. Attackers can exploit this without any authentication credentials.

💻 Affected Systems

Products:
  • Car Rental Management System
Versions: 1.0
Operating Systems: Any OS running PHP
Default Config Vulnerable: ⚠️ Yes
Notes: All installations of version 1.0 are vulnerable by default. The vulnerability exists in the core index.php file.

📦 What is this software?

Car Rental Management System by Car Rental Management System Project

View all CVEs affecting Car Rental Management System →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise with attacker gaining full control over the web server, accessing sensitive data, and potentially pivoting to other systems.

🟠

Likely Case

Remote code execution leading to data theft, website defacement, or installation of malware/backdoors on the vulnerable server.

🟢

If Mitigated

Limited impact if proper input validation and file inclusion restrictions are implemented, potentially only allowing file disclosure without code execution.

🌐 Internet-Facing: HIGH
🏢 Internal Only: MEDIUM

🎯 Exploit Status

Public PoC: ⚠️ Yes
Weaponized: LIKELY
Unauthenticated Exploit: ⚠️ Yes
Complexity: LOW

Exploitation requires minimal technical skill. Public proof-of-concept demonstrates file inclusion leading to code execution.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Not available

Vendor Advisory: Not available

Restart Required: No

Instructions:

1. Download the latest version from sourcecodester.com if available
2. Replace vulnerable files with patched versions
3. Test functionality after replacement

🔧 Temporary Workarounds

Input Validation Filter

all

Add input validation to sanitize the 'page' parameter before file inclusion

Modify index.php to validate page parameter against allowed values

Web Application Firewall Rules

all

Block requests containing directory traversal patterns in the page parameter

Add WAF rule: deny if contains '../' or similar patterns in URL parameters

🧯 If You Can't Patch

  • Isolate the system behind a firewall and restrict access to trusted IPs only
  • Implement strict input validation in the index.php file to whitelist allowed page values

🔍 How to Verify

Check if Vulnerable:

Test by accessing /index.php?page=../../../../etc/passwd and checking for file disclosure

Check Version:

Check the software version in admin panel or readme files

Verify Fix Applied:

Attempt the same LFI test and verify file inclusion no longer works

📡 Detection & Monitoring

Log Indicators:

  • Multiple requests to index.php with unusual page parameter values
  • Patterns like '../' or absolute paths in page parameter

Network Indicators:

  • HTTP requests with suspicious file paths in query parameters
  • Unusual file inclusion patterns in web traffic

SIEM Query:

web.url:*index.php* AND web.query:*page=* AND (web.query:*../* OR web.query:*etc/passwd*)

📊 Metadata

CVE ID: CVE-2020-29227
CVSS v3 Score: 9.8 (CRITICAL)
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: December 14, 2020
Last Updated: November 21, 2024

🔗 References

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