CVE-2024-2572: Employee Task Management System RCE Flaw

CVE-2024-2572 Overview

A critical Execution After Redirect (EAR) vulnerability has been identified in SourceCodester Employee Task Management System version 1.0. This vulnerability exists in the /task-details.php file and allows remote attackers to bypass authentication controls by continuing code execution after redirect headers are sent. The flaw enables unauthorized access to sensitive functionality that should be restricted to authenticated users only.

Critical Impact

Remote attackers can exploit this vulnerability without authentication to access protected resources and potentially manipulate task management data, leading to unauthorized data access and system compromise.

Affected Products

• SourceCodester Employee Task Management System 1.0
• Oretnom23 Employee Task Management System

Discovery Timeline

• 2024-03-18 - CVE-2024-2572 published to NVD
• 2025-02-20 - Last updated in NVD database

Technical Details for CVE-2024-2572

Vulnerability Analysis

The vulnerability is classified as CWE-698 (Execution After Redirect), a web application security flaw that occurs when server-side code continues to execute after issuing an HTTP redirect response. In the context of the Employee Task Management System, the /task-details.php script fails to properly terminate execution after sending redirect headers to unauthenticated users. This allows attackers to intercept and view content that should only be accessible after successful authentication.

When a user without proper session credentials attempts to access /task-details.php, the application correctly identifies the lack of authentication and sends a redirect header (typically to a login page). However, the PHP script continues processing the request and generates the full page content. An attacker intercepting this response at the network level or using tools that ignore redirect headers can access the protected information.

Root Cause

The root cause of this vulnerability is improper implementation of access control in the /task-details.php file. The developers implemented a redirect mechanism for unauthorized access but failed to call exit() or die() after the header("Location: ...") statement. PHP does not automatically halt script execution when sending HTTP headers, meaning any code following the redirect header will still be processed and included in the HTTP response body.

Attack Vector

The attack can be initiated remotely over the network without requiring any authentication or user interaction. An attacker needs only to send an HTTP request to the vulnerable endpoint and capture the full response before following any redirects. This can be accomplished using command-line tools like curl with the -i flag to display response headers, or by configuring a web proxy to intercept responses. The attack does not require any special privileges or knowledge of valid credentials, making it trivially exploitable.

Since no verified code examples are available, the vulnerability can be understood as follows: when accessing /task-details.php without authentication, the server sends a 302 Redirect response but includes the full protected page content in the response body. Tools that display raw HTTP responses (rather than following redirects) reveal this protected content to unauthorized users.

Detection Methods for CVE-2024-2572

Indicators of Compromise

• Unusual access patterns to /task-details.php from unauthenticated sessions
• HTTP requests that do not follow redirects (indicating automated tooling)
• Access logs showing successful content delivery despite redirect responses
• Anomalous request patterns from tools like curl, wget, or automated scanners

Detection Strategies

• Monitor web server logs for requests to /task-details.php that result in 302 status codes but have abnormally large response sizes
• Implement Web Application Firewall (WAF) rules to detect and block requests that appear to be exploit attempts
• Enable session logging to identify access attempts without valid session tokens
• Deploy network traffic analysis to identify clients that ignore redirect responses

Monitoring Recommendations

• Configure alerting for repeated unauthenticated access attempts to protected PHP endpoints
• Implement real-time log analysis to correlate authentication failures with successful content access
• Review access logs for request patterns indicative of vulnerability scanning tools

How to Mitigate CVE-2024-2572

Immediate Actions Required

• Immediately restrict access to /task-details.php at the web server level until patching is complete
• Add exit() or die() calls immediately after all redirect headers in the affected PHP files
• Implement IP-based access controls for sensitive administrative functions
• Consider taking the application offline if it contains sensitive data

Patch Information

No official patch has been released by the vendor. Organizations using this software should apply manual fixes by ensuring all redirect statements in PHP files are immediately followed by exit() or die() to terminate script execution. Review all PHP files in the application for similar patterns. For additional technical details, refer to the VulDB advisory and the GitHub PoC documentation.

Workarounds

• Implement a centralized authentication check at the beginning of all protected PHP files that includes explicit exit() calls
• Use .htaccess or web server configuration to restrict access to sensitive PHP files
• Deploy a reverse proxy or WAF to enforce authentication before requests reach the application
• Consider migrating to a more actively maintained task management solution

# Example fix for task-details.php
# Before (vulnerable):
# header("Location: login.php");
# // Code continues to execute...

# After (secure):
# header("Location: login.php");
# exit(); // Terminates script execution

# Apache .htaccess workaround to restrict access
<Files "task-details.php">
    Require valid-user
</Files>