CVE-2024-30630

Comprehensive Technical Analysis of CVE-2024-30630

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-30630

Description: Tenda FH1205 v2.0.0.7(775) contains a stack overflow vulnerability in the time parameter of the saveParentControlInfo function. This vulnerability allows an attacker to overwrite adjacent memory, potentially leading to arbitrary code execution.

CVSS Score: 9.8

Severity Evaluation:

• Critical: A CVSS score of 9.8 indicates a critical vulnerability. The high score is due to the potential for remote code execution, which can lead to complete system compromise.
• Impact Metrics:
  • Confidentiality: High
  • Integrity: High
  • Availability: High
• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker can exploit this vulnerability over the network by sending specially crafted packets to the affected device.
• Local Network Attack: An attacker with access to the local network can exploit this vulnerability to gain control over the device.

Exploitation Methods:

• Buffer Overflow: By sending a maliciously crafted time parameter, an attacker can cause a stack overflow, leading to arbitrary code execution.
• Remote Code Execution (RCE): The attacker can inject malicious code into the stack, which can be executed with the privileges of the affected process.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda FH1205 devices running firmware version v2.0.0.7(775).

Software Versions:

• Firmware version v2.0.0.7(775) is specifically affected. Other versions may also be vulnerable if they share the same codebase without the necessary patches.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Apply the latest firmware update provided by Tenda. Ensure that the update includes a patch for CVE-2024-30630.
• Network Segmentation: Isolate affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the affected devices.

Long-Term Strategies:

• Regular Patch Management: Establish a regular patch management process to ensure all devices are updated promptly.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor network traffic for suspicious activities.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential vulnerabilities.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Increased Risk: Devices running the affected firmware are at high risk of being compromised, leading to potential data breaches and unauthorized access.
• Supply Chain Risks: Organizations relying on Tenda FH1205 devices for critical operations may face disruptions and potential data loss.

Long-Term Impact:

• Reputation Damage: Tenda's reputation may be affected if the vulnerability is widely exploited.
• Industry-Wide Awareness: This incident highlights the importance of robust security practices in IoT device manufacturing and firmware development.

6. Technical Details for Security Professionals

Vulnerability Details:

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

Exploitation Steps:

1. Identify Target: Locate the Tenda FH1205 device on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the time parameter.
3. Send Payload: Transmit the crafted payload to the device, triggering the stack overflow.
4. Execute Code: Inject and execute arbitrary code on the device.

Detection and Response:

• Log Analysis: Monitor logs for unusual activities related to the saveParentControlInfo function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous behavior indicative of a stack overflow.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

Conclusion: CVE-2024-30630 represents a significant risk to organizations using Tenda FH1205 devices. Immediate mitigation through firmware updates and network segmentation is crucial. Long-term strategies should focus on robust security practices and regular audits to prevent similar vulnerabilities in the future.