CVE-2024-54805

Comprehensive Technical Analysis of CVE-2024-54805

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-54805 Description: Netgear WNR854T 1.5.2 (North America) is vulnerable to Command Injection. An attacker can send a specially crafted request to post.cgi, updating the nvram parameter get_email. Subsequently, they can visit the send_log.cgi endpoint, which uses the parameter in a system call to achieve command execution. CVSS Score: 9.8

Severity Evaluation: The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for remote code execution, which can lead to full system compromise. The vulnerability allows an attacker to execute arbitrary commands on the affected device, posing a significant risk to the integrity and confidentiality of the system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability remotely by sending a crafted HTTP request to the post.cgi endpoint.
• Network Access: The attacker needs network access to the vulnerable device, which can be achieved through various means such as compromising a connected device or exploiting other network vulnerabilities.

Exploitation Methods:

1. Crafted Request: The attacker sends a specially crafted HTTP request to post.cgi to update the nvram parameter get_email with malicious input.
2. Command Execution: The attacker then visits the send_log.cgi endpoint, which uses the malicious input in a system call, leading to command execution.

3. Affected Systems and Software Versions

Affected Systems:

• Netgear WNR854T router

Software Versions:

• Firmware version 1.5.2 (North America)

4. Recommended Mitigation Strategies

Immediate Actions:

1. Firmware Update: Ensure that the affected devices are updated to the latest firmware version provided by Netgear.
2. Network Segmentation: Isolate the vulnerable device from critical network segments to limit potential damage.
3. Access Control: Implement strict access controls to limit who can access the device's management interface.
4. Monitoring: Increase monitoring of network traffic to detect any suspicious activities targeting the vulnerable endpoints.

Long-Term Strategies:

1. Regular Patching: Establish a regular patching and update schedule for all network devices.
2. Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.
3. Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for and alert on suspicious activities.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Device Compromise: The vulnerability can lead to full compromise of the affected device, allowing attackers to gain control over the network.
• Data Breach: Sensitive information stored on or transmitted through the device can be accessed or exfiltrated.

Long-Term Impact:

• Reputation Damage: Organizations using the affected device may suffer reputational damage if a breach occurs.
• Increased Attack Surface: The vulnerability highlights the importance of securing IoT and network devices, which are often overlooked in security strategies.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: post.cgi
• Parameter: nvram parameter get_email
• Exploitation Endpoint: send_log.cgi

Exploitation Steps:

1. Crafted Request:

   POST /post.cgi HTTP/1.1
   Host: <vulnerable_device_ip>
   Content-Type: application/x-www-form-urlencoded
   
   get_email=<malicious_input>
   

2. Command Execution:

   GET /send_log.cgi HTTP/1.1
   Host: <vulnerable_device_ip>
   

Detection:

• Log Analysis: Monitor logs for unusual activities related to post.cgi and send_log.cgi.
• Network Traffic: Use network traffic analysis tools to detect anomalous requests targeting the vulnerable endpoints.

Mitigation:

• Input Validation: Ensure proper input validation and sanitization for all user-supplied data.
• Least Privilege: Implement the principle of least privilege to limit the impact of potential exploits.

Conclusion: CVE-2024-54805 represents a critical vulnerability in the Netgear WNR854T router, highlighting the need for robust security measures in network devices. Organizations should prioritize firmware updates and implement comprehensive security strategies to mitigate the risk associated with this vulnerability.