CVE-2024-35571

Comprehensive Technical Analysis of CVE-2024-35571

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-35571 Description: Tenda AX1806 v1.0.0.1 contains a stack overflow vulnerability via the iptv.stb.mode parameter in the function formSetIptv. CVSS Score: 9.8

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 by sending specially crafted packets to the affected device.
• Local Exploitation: If an attacker has local access to the device, they could manipulate the iptv.stb.mode parameter directly.

Exploitation Methods:

• Buffer Overflow: By sending a large amount of data to the iptv.stb.mode parameter, an attacker can cause a stack overflow, leading to arbitrary code execution.
• Payload Injection: An attacker could inject malicious code into the stack, allowing them to execute commands on the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1806 routers running firmware version v1.0.0.1.

Software Versions:

• The vulnerability specifically affects Tenda AX1806 v1.0.0.1. 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. Ensure that the firmware update addresses the stack overflow vulnerability.
• Network Segmentation: Isolate the affected devices from critical network segments to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to restrict access to the affected device, allowing only trusted IP addresses.

Long-Term Strategies:

• Regular Patching: Establish a regular patching schedule to ensure that all devices are running the latest firmware.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity that may indicate an exploitation attempt.
• Security Audits: Conduct regular security audits to identify and mitigate potential vulnerabilities in network devices.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Increased Risk: The vulnerability poses a significant risk to organizations and individuals using the affected Tenda AX1806 routers.
• Potential for Widespread Exploitation: Given the critical nature of the vulnerability, there is a high potential for widespread exploitation if not addressed promptly.

Long-Term Impact:

• Reputation Damage: Tenda's reputation may be affected if the vulnerability is not handled effectively.
• Increased Awareness: This incident highlights the importance of regular firmware updates and proactive security measures for network devices.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: formSetIptv
• Parameter: iptv.stb.mode
• Type of Vulnerability: Stack overflow

Exploitation Steps:

1. Identify Target: Locate the Tenda AX1806 router running the vulnerable firmware version.
2. Craft Payload: Create a payload that exceeds the buffer size for the iptv.stb.mode parameter.
3. Send Payload: Transmit the crafted payload to the device, causing a stack overflow and potentially leading to arbitrary code execution.

Detection Methods:

• Log Analysis: Monitor logs for unusual activity related to the formSetIptv function.
• Network Traffic Analysis: Use network monitoring tools to detect anomalous traffic patterns that may indicate an exploitation attempt.

Mitigation Techniques:

• Input Validation: Ensure that all input parameters are properly validated to prevent buffer overflows.
• Code Review: Conduct a thorough code review to identify and fix similar vulnerabilities in other functions.

Conclusion: CVE-2024-35571 represents a critical vulnerability in Tenda AX1806 routers that requires immediate attention. Organizations should prioritize firmware updates and implement robust security measures to mitigate the risk of exploitation. Regular security audits and proactive monitoring are essential to maintain a secure network environment.

This analysis provides a comprehensive overview of the vulnerability, its potential impact, and recommended mitigation strategies. It is crucial for cybersecurity professionals to stay informed and take proactive measures to protect against such threats.