CVE-2024-54804

Comprehensive Technical Analysis of CVE-2024-54804

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-54804 CISA Vulnerability Name: CVE-2024-54804 CVSS Score: 9.8

The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for complete system compromise through command injection, which can lead to arbitrary code execution with elevated privileges. The vulnerability allows an attacker to inject malicious commands into the system, potentially leading to full control over the affected device.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker can exploit this vulnerability remotely by sending a specially crafted HTTP request to the post.cgi endpoint.
• Local Network Attack: An attacker with access to the local network can also exploit this vulnerability by targeting the device's web interface.

Exploitation Methods:

• Command Injection: The attacker can inject commands into the wan_hostname parameter, which is then executed by the system. This can be achieved by crafting a malicious HTTP POST request to post.cgi.
• Forced Reboot: By manipulating the nvram parameter and forcing a reboot, the attacker can ensure that the injected commands are executed during the reboot process.

3. Affected Systems and Software Versions

Affected Systems:

• Netgear WNR854T (North America)

Affected Software Versions:

• Firmware version 1.5.2

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that the device firmware is updated to the latest version provided by Netgear.
• Network Segmentation: Isolate the device from the main network to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the device's web interface.

Long-Term Strategies:

• Regular Patching: Implement a regular patching and update schedule for all network devices.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity targeting the device.
• Access Control: Restrict access to the device's web interface to trusted IP addresses only.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing risks associated with IoT devices and network equipment. The potential for remote command injection underscores the need for robust security measures in consumer and enterprise networks. This vulnerability can be exploited to gain unauthorized access, exfiltrate data, or launch further attacks within the network.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: post.cgi
• Parameter: wan_hostname
• Exploitation: The attacker sends a crafted HTTP POST request with a malicious payload in the wan_hostname parameter. The payload is executed during the reboot process, leading to command injection.

Example Exploit:

POST /post.cgi HTTP/1.1
Host: <target_ip>
Content-Type: application/x-www-form-urlencoded
Content-Length: <length>

wan_hostname=`<malicious_command>`

Detection:

• Log Analysis: Monitor logs for unusual POST requests to post.cgi and any unexpected reboots.
• Network Traffic: Use network monitoring tools to detect anomalous traffic patterns targeting the device.

Mitigation:

• Input Validation: Ensure that all user inputs are properly validated and sanitized to prevent command injection.
• Least Privilege: Apply the principle of least privilege to limit the impact of a successful exploit.

Conclusion: CVE-2024-54804 represents a significant risk to networks utilizing the affected Netgear WNR854T device. Immediate mitigation steps, including firmware updates and network segmentation, are crucial to prevent exploitation. Long-term strategies should focus on regular patching, robust access controls, and continuous monitoring to enhance overall network security.