CVE-2024-44565

Comprehensive Technical Analysis of CVE-2024-44565

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-44565 Description: Tenda AX1806 v1.0.0.1 contains a stack overflow vulnerability via the serverName parameter in the function form_fast_setting_internet_set. 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 stack overflow can be exploited to inject malicious code, leading to unauthorized access, data breaches, and loss of system integrity.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

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

Exploitation Methods:

• Buffer Overflow: By sending an overly long serverName parameter, an attacker can overwrite the stack, potentially leading to arbitrary code execution.
• Payload Injection: The attacker can inject a payload that, when executed, grants them control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1806 routers running firmware version v1.0.0.1.

Software Versions:

• Specifically, the vulnerability is present in Tenda AX1806 v1.0.0.1. Other versions may also be affected, but this has not been confirmed.

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 the affected devices from critical network segments to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the vulnerable function.

Long-Term Strategies:

• Regular Patching: Ensure that all network devices are regularly updated with the latest security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity that may indicate an exploitation attempt.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Widespread Deployment: Tenda routers are widely used in both home and small business environments, making this vulnerability a significant risk.
• Supply Chain Risks: Compromised routers can be used as entry points for further attacks on connected networks and systems.
• Reputation Damage: For organizations using affected devices, a successful exploitation can lead to data breaches, financial loss, and reputational damage.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: form_fast_setting_internet_set
• Parameter: serverName
• Issue: Stack overflow due to insufficient bounds checking on the serverName parameter.

Exploitation Steps:

1. Identify Target: Locate a Tenda AX1806 router running the vulnerable firmware version.
2. Craft Payload: Create a payload that exceeds the buffer size for the serverName parameter.
3. Send Request: Send the crafted request to the router, triggering the stack overflow.
4. Execute Code: If successful, the payload will execute, granting the attacker control over the device.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the form_fast_setting_internet_set function.
• 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 and mitigate any successful exploitation.

Conclusion: CVE-2024-44565 represents a critical vulnerability that requires immediate attention. Organizations should prioritize updating affected devices and implementing robust security measures to protect against potential exploitation. Regular monitoring and proactive security practices are essential to mitigate the risks associated with this vulnerability.