CVE-2024-30595

Comprehensive Technical Analysis of CVE-2024-30595

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-30595 CISA Vulnerability Name: CVE-2024-30595 Description: Tenda FH1202 v1.2.0.14(408) has a stack overflow vulnerability in the deviceId parameter of the addWifiMacFilter function. 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 complete system compromise. The stack overflow vulnerability can be exploited to execute arbitrary code, leading to severe impacts such as data breaches, unauthorized access, and denial of service.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted request to the addWifiMacFilter function with a malicious deviceId parameter, causing a stack overflow.
• Network-Based Attacks: Since the vulnerability is in a network-accessible function, attackers can exploit it over the network without needing physical access to the device.

Exploitation Methods:

• Buffer Overflow: By sending a large or malformed deviceId parameter, an attacker can overwrite the stack and inject malicious code.
• Code Execution: The stack overflow can be leveraged to execute arbitrary code, allowing the attacker to gain control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda FH1202 devices running firmware version v1.2.0.14(408).

Software Versions:

• Specifically, the vulnerability is present in the addWifiMacFilter function of the firmware version v1.2.0.14(408).

4. Recommended Mitigation Strategies

Immediate Actions:

• Patch Management: Apply the latest firmware update provided by Tenda that addresses this vulnerability.
• Network Segmentation: Isolate affected devices from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the addWifiMacFilter function.

Long-Term Strategies:

• Regular Audits: Conduct regular security audits and vulnerability assessments on IoT devices.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activities.
• User Education: Educate users on the importance of updating firmware and maintaining secure network practices.

5. Impact on Cybersecurity Landscape

Broader Implications:

• IoT Security: This vulnerability highlights the ongoing challenges in securing IoT devices, which are often deployed in large numbers and can be difficult to update.
• Supply Chain Risks: The vulnerability underscores the importance of secure software development practices and the need for robust supply chain security.
• Regulatory Compliance: Organizations must ensure compliance with regulations and standards that mandate timely patching and secure configuration of devices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: addWifiMacFilter
• Parameter: deviceId
• Issue: Stack overflow due to improper bounds checking on the deviceId parameter.

Exploitation Steps:

1. Identify Target: Locate Tenda FH1202 devices running the vulnerable firmware version.
2. Craft Payload: Create a payload that exceeds the expected length of the deviceId parameter.
3. Send Request: Send the crafted payload to the addWifiMacFilter function via a network request.
4. Execute Code: Overwrite the stack and inject malicious code to gain control over the device.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the addWifiMacFilter function.
• Anomaly Detection: Use anomaly detection tools to identify deviations from normal behavior.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

Conclusion: CVE-2024-30595 represents a critical vulnerability that requires immediate attention. Organizations should prioritize patching affected devices and implementing robust security measures to protect against potential exploitation. The broader cybersecurity community should continue to focus on improving IoT security practices and ensuring timely updates to mitigate such risks.