CVE-2024-30602

Comprehensive Technical Analysis of CVE-2024-30602

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-30602 Description: Tenda FH1203 v2.0.1.6 has a stack overflow vulnerability in the schedStartTime parameter of the setSchedWifi function. 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, the ease of exploitation, and the significant impact on the confidentiality, integrity, and availability of the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker could exploit this vulnerability over the network, potentially without authentication, by sending a specially crafted request to the setSchedWifi function with a malicious schedStartTime parameter.
• Local Exploitation: If an attacker has local access to the device, they could exploit the vulnerability to escalate privileges or execute arbitrary code.

Exploitation Methods:

• Buffer Overflow: The attacker could send a payload that exceeds the buffer size allocated for the schedStartTime parameter, leading to a stack overflow.
• Code Execution: By carefully crafting the payload, the attacker could overwrite the return address on the stack, redirecting the execution flow to injected malicious code.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda FH1203 devices running firmware version v2.0.1.6.

Software Versions:

• The vulnerability specifically affects Tenda FH1203 v2.0.1.6. Other versions may also be affected but have not been explicitly mentioned in the CVE.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Firmware Update: Users should immediately update to a patched version of the firmware if available.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the setSchedWifi function from untrusted networks.

Long-Term Mitigation:

• Regular Patching: Establish a regular patching schedule to ensure all devices are running the latest firmware.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity targeting the setSchedWifi function.
• Access Control: Implement strong access control measures to limit who can configure the device.

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 patch.
• Supply Chain Risk: Organizations relying on Tenda FH1203 devices need to assess their supply chain risk and ensure that vendors provide timely security updates.
• Remote Workforce: With the increase in remote work, the potential for exploitation of such vulnerabilities in home networks has risen, posing a risk to both personal and corporate data.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: setSchedWifi
• Parameter: schedStartTime
• Vulnerability Type: Stack Overflow

Exploitation Steps:

1. Identify Target: Locate the Tenda FH1203 device on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the schedStartTime parameter.
3. Send Request: Send the crafted request to the setSchedWifi function.
4. Execute Code: If successful, the stack overflow will allow the attacker to execute arbitrary code on the device.

Detection and Monitoring:

• Log Analysis: Monitor logs for unusual activity related to the setSchedWifi function.
• Anomaly Detection: Use anomaly detection tools to identify deviations from normal behavior.
• Network Traffic: Analyze network traffic for suspicious patterns that may indicate an exploitation attempt.

Conclusion: CVE-2024-30602 represents a significant risk to organizations and individuals using Tenda FH1203 devices. Immediate mitigation steps are essential to prevent potential exploitation. Long-term strategies should focus on improving the overall security posture of IoT devices and ensuring timely updates and patches.

References:

• Exploit and Third Party Advisory

This comprehensive analysis should help cybersecurity professionals understand the implications of CVE-2024-30602 and take appropriate actions to mitigate the risk.