CVE-2024-41461

Comprehensive Technical Analysis of CVE-2024-41461

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-41461 Description: Tenda FH1201 v1.2.0.14 contains a stack-based buffer overflow vulnerability via the list1 parameter at ip/goform/DhcpListClient. CVSS Score: 9.8

Severity Evaluation: The CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the potential for remote code execution, which can lead to complete system compromise. The vulnerability's impact on confidentiality, integrity, and availability is severe, making it a high-priority issue for immediate remediation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted HTTP request to the vulnerable endpoint (ip/goform/DhcpListClient) with a malicious list1 parameter.
• Network-Based Attack: Given that the vulnerability is in a DHCP client list, it can be exploited over the network, making it accessible to attackers with network access.

Exploitation Methods:

• Buffer Overflow: By sending an overly long list1 parameter, an attacker can overflow the stack buffer, potentially leading to arbitrary code execution.
• Payload Delivery: The attacker can inject malicious code into the overflowed buffer, allowing them to execute commands on the affected device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda FH1201 devices running firmware version v1.2.0.14.

Software Versions:

• Specifically, the vulnerability affects Tenda FH1201 v1.2.0.14. Other versions may also be affected but have not been explicitly mentioned in the CVE details.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Upgrade to the latest firmware version provided by Tenda, which should include a patch for this vulnerability.
• Network Segmentation: Isolate affected devices from critical network segments to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the vulnerable endpoint (ip/goform/DhcpListClient).

Long-Term Strategies:

• Regular Patch Management: Ensure that all devices are regularly updated with the latest security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity targeting the vulnerable endpoint.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues proactively.

5. Impact on Cybersecurity Landscape

Broader Implications:

• IoT Security: This vulnerability highlights the ongoing challenges in securing Internet of Things (IoT) devices, which are often deployed in large numbers and can be difficult to update.
• Supply Chain Risks: Vulnerabilities in widely used devices like Tenda routers can have cascading effects, impacting both home users and enterprise networks.
• Remote Code Execution: The potential for remote code execution underscores the need for robust security measures to protect against such high-impact vulnerabilities.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Stack-based buffer overflow.
• Location: The vulnerability is located in the handling of the list1 parameter at the ip/goform/DhcpListClient endpoint.
• Exploit: The vulnerability can be exploited by sending a crafted HTTP request with an overly long list1 parameter, leading to a stack overflow and potential code execution.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the ip/goform/DhcpListClient endpoint.
• Anomaly Detection: Use anomaly detection tools to identify abnormal traffic patterns that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts, including isolating affected devices and applying patches.

References:

• Exploit and Third Party Advisory

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their networks from potential attacks.