CVE-2024-44549

Comprehensive Technical Analysis of CVE-2024-44549

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-44549 Description: Tenda AX1806 v1.0.0.1 contains a stack overflow via the iptv.stb.port parameter in the function formGetIptv. 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 system instability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted request to the formGetIptv function with a malformed iptv.stb.port 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 excessively long input to the iptv.stb.port parameter, an attacker can overwrite adjacent memory, potentially leading to arbitrary code execution.
• Payload Injection: Crafting a payload that overwrites the return address on the stack to point to malicious code can allow an attacker to execute arbitrary commands on 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: Users should immediately update to the latest firmware version provided by Tenda, which should include a patch for this vulnerability.
• Network Segmentation: Isolate the affected devices on a separate network segment to limit potential attack vectors.
• Firewall Rules: Implement strict firewall rules to restrict access to the formGetIptv function to trusted IP addresses only.

Long-Term Strategies:

• Regular Patch Management: Establish a routine for regularly checking and applying firmware updates.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for unusual network traffic patterns that may indicate an exploitation attempt.
• Security Audits: Conduct regular security audits and vulnerability assessments on all network devices.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Supply Chain Risks: Vulnerabilities in widely-used consumer devices like routers can have a significant impact on the broader cybersecurity landscape, affecting both home users and small businesses.
• IoT Security: This incident highlights the ongoing challenges in securing Internet of Things (IoT) devices, which often have limited resources and infrequent updates.
• Reputation Impact: For manufacturers like Tenda, such vulnerabilities can impact brand reputation and consumer trust.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: formGetIptv
• Parameter: iptv.stb.port
• Type of Vulnerability: Stack overflow
• Exploitation: The vulnerability can be triggered by sending a request with an overly long iptv.stb.port parameter, leading to a buffer overflow.

Detection and Response:

• Log Analysis: Monitor logs for unusual activity related to the formGetIptv function.
• Memory Analysis: Use tools like gdb to analyze the memory state of the device and identify any anomalies.
• Exploit Detection: Implement signatures in IDS/IPS systems to detect and block malicious requests targeting the iptv.stb.port parameter.

References:

• Tenda AX1806 Buffer Overflow in formGetIptv

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