Web Application, Improper Input Validation, CVE-2023-XXXX (Critical)

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How the Mentioned CVE Works:

The vulnerability arises due to improper validation of user input in the “Role” field on the user profile update page (/panel/users/{name}/profile). Attackers can inject invalid values (e.g., “>”) into the Role=User parameter. This causes the system to crash, returning a 500 status code and rendering the entire site and administration panel unavailable. The error persists until the invalid role parameter is manually corrected in the user account file. This flaw primarily impacts the Availability aspect of the CIA triad, as it disrupts service without compromising data integrity or confidentiality. Exploitation requires high privileges, making it a potential insider threat or a risk if privileged accounts are compromised.

DailyCVE Form:

Platform: Web Application

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Version: Pre-patch versions

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Vulnerability: Improper Input Validation

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Severity: Critical

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Date: 2023-10-XX

What Undercode Say:

Exploitation:

  1. Intercept Request: Use tools like Burp Suite or OWASP ZAP to intercept the /panel/users/{name}/profile request.
  2. Inject Payload: Modify the Role=User parameter with an invalid value (e.g., Role=>).
  3. Observe Crash: The system will crash, returning a 500 error and making the site unavailable.

Protection:

  1. Input Validation: Implement strict validation for the Role field to reject invalid inputs.
  2. Patch Update: Apply the latest security patches provided by the vendor.
  3. Access Control: Restrict access to the user profile update page to authorized personnel only.

Commands:

  • Check Server Logs: 
    tail -f /var/log/apache2/error.log
  • Restore User File: 
    nano /path/to/user_account_file

Code Snippets:

  • Input Validation (PHP Example): 
    $allowed_roles = ["User", "Admin", "Editor"];
if (!in_array($_POST['role'], $allowed_roles)) {
die("Invalid role selected.");
}

URLs:

Analytics:

  • Impact: High disruption with minimal effort.
  • Likelihood: Low due to privilege requirements.
  • Mitigation: Immediate patching and input validation.

By following these steps, organizations can exploit, analyze, and protect against this critical vulnerability effectively.

References:

Reported By: https://github.com/advisories/GHSA-c85w-x26q-ch87
Extra Source Hub:
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