CVE-2023-50984

Comprehensive Technical Analysis of CVE-2023-50984

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-50984 Description: Tenda i29 v1.0 V1.0.0.5 contains a buffer overflow vulnerability in the ip parameter of the spdtstConfigAndStart function. CVSS Score: 9.8

Severity Evaluation:

• CVSS Base Score: 9.8 (Critical)
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged

The high CVSS score indicates that this vulnerability is critical and poses a significant risk to affected systems. The buffer overflow can lead to arbitrary code execution, denial of service, or unauthorized access to sensitive information.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: An attacker can exploit this vulnerability over the network by sending specially crafted packets to the device.
• Remote Code Execution (RCE): By exploiting the buffer overflow, an attacker can execute arbitrary code on the affected device.
• Denial of Service (DoS): An attacker can crash the device, making it unavailable for legitimate users.

Exploitation Methods:

• Crafted Input: An attacker can send a maliciously crafted ip parameter to the spdtstConfigAndStart function, causing a buffer overflow.
• Payload Delivery: The attacker can embed a payload within the crafted input to achieve remote code execution.
• Automated Tools: Exploitation can be automated using scripts or tools that target the vulnerable function.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda i29 v1.0 devices running firmware version V1.0.0.5.

Software Versions:

• Firmware version V1.0.0.5 for Tenda i29 v1.0.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Network Segmentation: Isolate affected devices from critical networks to limit the attack surface.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the device.
• Monitoring: Increase monitoring of network traffic to detect and respond to suspicious activities.

Long-Term Mitigation:

• Firmware Update: Apply the latest firmware updates provided by Tenda to patch the vulnerability.
• Security Patches: Regularly check for and apply security patches from the vendor.
• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on potential exploitation attempts.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Increased Risk: Organizations using the affected Tenda i29 devices are at high risk of exploitation, leading to potential data breaches, service disruptions, and unauthorized access.
• Supply Chain Risks: Vendors and suppliers using these devices may face disruptions and security breaches.

Long-Term Impact:

• Reputation Damage: Organizations may suffer reputational damage if a breach occurs due to this vulnerability.
• Compliance Issues: Non-compliance with security standards and regulations may result in legal and financial penalties.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: spdtstConfigAndStart
• Parameter: ip
• Issue: Buffer overflow due to insufficient bounds checking on the ip parameter.

Exploitation Steps:

1. Identify Target: Locate the Tenda i29 v1.0 device on the network.
2. Craft Payload: Create a payload that exceeds the buffer size for the ip parameter.
3. Send Payload: Transmit the crafted payload to the device, triggering the buffer overflow.
4. Execute Code: If successful, the payload will execute arbitrary code on the device.

Detection and Response:

• Log Analysis: Review logs for unusual network traffic patterns and failed connection attempts.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.
• Patch Management: Ensure a robust patch management process to apply updates promptly.

References:

• Tenda Official Website
• Exploit and Advisory

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risks associated with CVE-2023-50984 and enhance their overall cybersecurity posture.