CVE-2024-7578: ALR-F800 Firmware Auth Bypass Vulnerability

CVE-2024-7578 Overview

A critical improper authorization vulnerability has been identified in Alien Technology ALR-F800 RFID reader devices running firmware versions up to 19.10.24.00. The vulnerability exists in the /var/www/cmd.php file, where manipulation of the cmd argument allows attackers to bypass authorization controls. This flaw enables remote attackers to execute commands without proper authentication, potentially compromising the device and any systems it connects to.

Critical Impact

Remote attackers can bypass authorization controls on Alien Technology ALR-F800 RFID readers, potentially gaining unauthorized access to device functions and sensitive RFID data without authentication.

Affected Products

• Alien Technology ALR-F800 Firmware (versions up to 19.10.24.00)
• Alien Technology ALR-F800 Hardware Device
• RFID infrastructure deployments utilizing ALR-F800 readers

Discovery Timeline

• 2024-08-07 - CVE-2024-7578 published to NVD
• 2024-08-28 - Last updated in NVD database

Technical Details for CVE-2024-7578

Vulnerability Analysis

This vulnerability falls under CWE-285 (Improper Authorization), which occurs when a software component does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. In the case of the Alien Technology ALR-F800, the web interface component located at /var/www/cmd.php fails to properly validate authorization before processing the cmd parameter.

The ALR-F800 is an enterprise-class RFID reader commonly deployed in supply chain management, asset tracking, and industrial automation environments. Exploitation of this vulnerability could allow attackers to access or manipulate RFID reader configurations, intercept tag data, or use the compromised device as a pivot point for further network intrusion.

The exploit has been publicly disclosed and is available for use, increasing the risk of exploitation in the wild. The vendor, Alien Technology, was contacted about this disclosure but did not respond.

Root Cause

The root cause of this vulnerability is the absence of proper authorization checks in the cmd.php file. The application processes the cmd parameter without verifying that the requesting user has appropriate permissions to execute the specified command. This allows any remote user with network access to the device to submit arbitrary commands through the web interface.

Attack Vector

The attack can be launched remotely over the network without requiring any user interaction or prior authentication. An attacker with network access to the ALR-F800 device can craft HTTP requests targeting the /var/www/cmd.php endpoint with malicious cmd parameter values. The attack exploits the following conditions:

The vulnerability is accessible via HTTP requests to the device's web interface. The cmd parameter accepts input that is processed without authorization validation. No authentication credentials or session tokens are required to exploit the flaw. The attack can be performed from any network location with connectivity to the target device.

For technical details on the vulnerability, see the GitHub Vulnerability Report.

Detection Methods for CVE-2024-7578

Indicators of Compromise

• Unexpected HTTP requests to /var/www/cmd.php or similar command execution endpoints on ALR-F800 devices
• Anomalous network traffic patterns originating from or directed at RFID reader infrastructure
• Unusual configuration changes to ALR-F800 devices without authorized administrator activity
• Authentication logs showing access attempts from unexpected IP addresses or geographic locations

Detection Strategies

• Deploy network monitoring to detect HTTP requests containing suspicious cmd parameter values targeting ALR-F800 devices
• Implement IDS/IPS rules to alert on traffic patterns associated with command injection or authorization bypass attempts
• Conduct regular configuration audits of ALR-F800 devices to identify unauthorized changes
• Review web server logs on ALR-F800 devices for anomalous access patterns to cmd.php

Monitoring Recommendations

• Enable and centralize logging for all ALR-F800 web interface access
• Configure SIEM alerts for repeated access attempts to command execution endpoints
• Monitor for outbound connections from RFID reader devices to unexpected external destinations
• Implement network segmentation monitoring to detect lateral movement attempts from compromised readers

How to Mitigate CVE-2024-7578

Immediate Actions Required

• Isolate affected ALR-F800 devices from untrusted network segments immediately
• Implement network access controls to restrict access to the device's web interface to authorized management hosts only
• Review device logs for evidence of exploitation and investigate any suspicious activity
• Consider disabling the web interface if not operationally required until a patch is available

Patch Information

At the time of publication, no official patch has been released by Alien Technology. The vendor was contacted regarding this vulnerability but did not respond. Organizations should monitor Alien Technology's official channels for security updates and apply patches as soon as they become available.

For additional technical details, refer to the VulDB entry tracking this vulnerability.

Workarounds

• Implement network segmentation to isolate ALR-F800 devices on a dedicated VLAN with restricted access
• Deploy a web application firewall (WAF) or reverse proxy to filter and validate requests to the cmd.php endpoint
• Restrict access to the device's web management interface using firewall rules to permit only trusted administrator IP addresses
• Enable HTTPS with strong TLS configuration if available to prevent man-in-the-middle attacks during administration

# Example iptables rules to restrict access to ALR-F800 web interface
# Replace 192.168.1.100 with ALR-F800 IP and 10.0.0.5 with admin workstation IP

iptables -A INPUT -p tcp -d 192.168.1.100 --dport 80 -s 10.0.0.5 -j ACCEPT
iptables -A INPUT -p tcp -d 192.168.1.100 --dport 80 -j DROP
iptables -A INPUT -p tcp -d 192.168.1.100 --dport 443 -s 10.0.0.5 -j ACCEPT
iptables -A INPUT -p tcp -d 192.168.1.100 --dport 443 -j DROP