CVE-2024-7579 Overview
CVE-2024-7579 is an operating system (OS) command injection vulnerability affecting Alien Technology ALR-F800 RFID readers running firmware versions up to 19.10.24.00. The flaw resides in the popen function call within /var/www/cgi-bin/upgrade.cgi, part of the File Name Handler component. Attackers can manipulate the uploadedFile argument to inject arbitrary OS commands. The vulnerability is remotely exploitable and has been publicly disclosed. The vendor was contacted before disclosure but did not respond.
Critical Impact
Authenticated remote attackers can execute arbitrary operating system commands on affected ALR-F800 devices through the upgrade.cgi interface, potentially leading to full device compromise.
Affected Products
- Alien Technology ALR-F800 (hardware)
- Alien Technology ALR-F800 firmware versions up to 19.10.24.00
- Deployments using the /var/www/cgi-bin/upgrade.cgi File Name Handler
Discovery Timeline
- 2024-08-07 - CVE-2024-7579 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-7579
Vulnerability Analysis
The vulnerability is classified as OS Command Injection (CWE-78). It exists in /var/www/cgi-bin/upgrade.cgi, a CGI script used to handle firmware upgrade operations on the ALR-F800 RFID reader. The script processes the uploadedFile parameter and passes it into a popen call without adequate input sanitization.
Because popen invokes a shell to execute the constructed command string, attacker-controlled metacharacters in uploadedFile are interpreted by the shell. This allows execution of arbitrary OS commands under the privileges of the web server process on the embedded device. Successful exploitation can lead to persistence, lateral movement across the connected network, and manipulation of RFID inventory data.
Root Cause
The root cause is unsafe concatenation of user-supplied input into a shell command string passed to popen. The CGI handler does not validate, escape, or sanitize special shell metacharacters such as ;, |, &, `, or $() in the uploadedFile argument. This design allows command separation and substitution to break out of the intended firmware upload workflow.
Attack Vector
Exploitation occurs over the network by sending a crafted HTTP request to the upgrade.cgi endpoint with a malicious uploadedFile value. Low-privileged authenticated access to the web interface is required. Because embedded devices typically run CGI processes with elevated privileges, injected commands can access the underlying filesystem, network interfaces, and RFID subsystem. Refer to the public technical writeup on GitHub and the VulDB entry #273859 for further technical detail.
Detection Methods for CVE-2024-7579
Indicators of Compromise
- HTTP requests to /cgi-bin/upgrade.cgi containing shell metacharacters (;, |, &, `, $()) in the uploadedFile parameter.
- Unexpected outbound network connections originating from ALR-F800 devices to unknown hosts.
- New or modified files on the reader's filesystem outside of normal firmware upgrade paths.
- Unauthorized process execution or spawned shells traceable to the web server user context.
Detection Strategies
- Inspect web server and reverse-proxy logs for POST or GET requests to upgrade.cgi with anomalous uploadedFile values.
- Deploy network intrusion detection signatures that flag command injection patterns targeting embedded CGI endpoints.
- Correlate device management traffic with baseline firmware upgrade schedules to identify off-cycle requests.
Monitoring Recommendations
- Forward network flow data and web access logs from RFID reader management VLANs to a centralized SIEM for correlation.
- Alert on any HTTP interaction with ALR-F800 CGI endpoints from unexpected source addresses.
- Monitor DNS queries originating from RFID readers, as command execution often triggers outbound resolution to attacker infrastructure.
How to Mitigate CVE-2024-7579
Immediate Actions Required
- Restrict network access to the ALR-F800 management interface using firewall rules or a dedicated management VLAN.
- Disable or block external access to /cgi-bin/upgrade.cgi at the network perimeter or via a reverse proxy access control list.
- Rotate any credentials used to authenticate to affected devices and enforce strong, unique passwords.
- Inventory all ALR-F800 devices and identify firmware versions up to 19.10.24.00 for prioritized remediation.
Patch Information
No vendor patch has been published. According to the CVE record, Alien Technology was contacted about this disclosure but did not respond. Organizations should monitor the vendor's website for future firmware updates and consult the VulDB advisory #273859 for updates.
Workarounds
- Place affected devices behind a network segment that only permits access from authorized management hosts.
- Terminate management sessions on an authenticated reverse proxy that filters requests containing shell metacharacters in uploadedFile.
- Disable remote firmware upgrade functionality where operationally feasible and perform upgrades only through a physically controlled channel.
- Consider replacing end-of-support devices with actively maintained hardware if no vendor response is forthcoming.
# Example iptables rule to restrict access to the ALR-F800 management interface
# Replace 10.0.0.0/24 with your authorized management subnet
# and 192.168.10.50 with the ALR-F800 IP address
iptables -A INPUT -p tcp -d 192.168.10.50 --dport 80 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp -d 192.168.10.50 --dport 80 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
