CVE-2024-44555

Comprehensive Technical Analysis of CVE-2024-44555

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-44555 CISA Vulnerability Name: CVE-2024-44555 CVSS Score: 9.8

The vulnerability in question is a stack overflow in the Tenda AX1806 v1.0.0.1 router firmware, specifically within the setIptvInfo function when handling the iptv.city.vlan parameter. A CVSS score of 9.8 indicates a critical severity level, suggesting that this vulnerability poses a significant risk to affected systems. The high score is likely due to the potential for remote code execution, which can lead to full system compromise.

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 router.
• Local Network Attack: An attacker with access to the local network could exploit the vulnerability to gain control over the router.

Exploitation Methods:

• Buffer Overflow: By sending a maliciously crafted iptv.city.vlan parameter, an attacker can overflow the stack buffer in the setIptvInfo function.
• Code Execution: The overflow can be leveraged to inject and execute arbitrary code, potentially leading to full control over the router.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1806 routers running firmware version v1.0.0.1.

Software Versions:

• The vulnerability is confirmed in Tenda AX1806 v1.0.0.1. Other versions may also be affected but have not been explicitly mentioned.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Apply the latest firmware update from Tenda as soon as it becomes available.
• Network Segmentation: Isolate the router from critical network segments to limit potential damage.
• Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.

Long-Term Strategies:

• Regular Patching: Ensure that all network devices are regularly updated with the latest security patches.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious activity.
• Access Control: Implement strong access controls and authentication mechanisms for network devices.

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing risk associated with IoT devices, particularly routers, which are often the first line of defense in home and small business networks. The high CVSS score underscores the potential for severe impact, including data breaches, unauthorized access, and network disruption. This vulnerability serves as a reminder of the importance of timely patching and proactive security measures in mitigating such risks.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function: setIptvInfo
• Parameter: iptv.city.vlan
• Issue: Stack overflow due to insufficient bounds checking on the iptv.city.vlan 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 iptv.city.vlan parameter.
3. Send Payload: Transmit the payload to the router, triggering the stack overflow.
4. Execute Code: Inject and execute arbitrary code to gain control over the router.

Detection and Response:

• Log Analysis: Monitor router logs for unusual activity or error messages related to the setIptvInfo function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous network traffic patterns.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any detected exploitation attempts.

References:

• Tenda AX1806 Buffer Overflow in setIptvInfo

By addressing this vulnerability promptly and implementing robust security measures, organizations can significantly reduce the risk of exploitation and protect their networks from potential attacks.