CVE-2024-44558

Comprehensive Technical Analysis of CVE-2024-44558

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-44558 CISA Vulnerability Name: CVE-2024-44558 Description: Tenda AX1806 v1.0.0.1 contains a stack overflow via the adv.iptv.stbpvid parameter in the function setIptvInfo. CVSS Score: 9.8

The CVSS score of 9.8 indicates a critical vulnerability. This high score is due to the potential for remote code execution, which can lead to complete system compromise. The stack overflow vulnerability can be exploited to overwrite adjacent memory, leading to arbitrary code execution or denial of service.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted request to the setIptvInfo function with a malicious adv.iptv.stbpvid parameter, causing a stack overflow.
• Network-Based Attacks: Given that the Tenda AX1806 is a router, the attack can be initiated over the network, making it accessible to remote attackers.

Exploitation Methods:

• Buffer Overflow: By sending an overly long input to the adv.iptv.stbpvid parameter, an attacker can overwrite the return address on the stack, leading to arbitrary code execution.
• Code Injection: An attacker can inject malicious code into the stack, which can be executed when the function returns, leading to complete control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1806 routers running firmware version v1.0.0.1.

Software Versions:

• Tenda AX1806 firmware v1.0.0.1.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Upgrade to the latest firmware version provided by Tenda that addresses this vulnerability.
• Network Segmentation: Isolate the affected routers from critical network segments to limit potential damage.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the router's management interface.

Long-Term Strategies:

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

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 critical nature of the vulnerability and the potential for widespread impact if exploited. This incident 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 Affected: setIptvInfo
• Parameter: adv.iptv.stbpvid
• Type of Vulnerability: Stack overflow
• Exploitation: The vulnerability can be triggered by sending a specially crafted request to the router, causing a buffer overflow in the setIptvInfo function.

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 adv.iptv.stbpvid parameter.
3. Send Request: Send the crafted request to the router's management interface.
4. Execute Code: Overwrite the return address on the stack to execute arbitrary code.

Detection and Response:

• Log Analysis: Monitor router logs for unusual activity or repeated failed attempts to access the management interface.
• Anomaly Detection: Use anomaly detection tools to identify deviations from normal behavior that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address and mitigate any successful exploitation attempts.

Conclusion: CVE-2024-44558 represents a significant risk to users of the Tenda AX1806 router. Immediate action is required to mitigate this vulnerability, including firmware updates and network security measures. The broader cybersecurity community should take note of the potential for similar vulnerabilities in other IoT devices and implement proactive security strategies to protect against such threats.