CVE-2023-45479

Comprehensive Technical Analysis of CVE-2023-45479

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-45479 CVSS Score: 9.8

The vulnerability in question is a stack overflow in the Tenda AC10 router, specifically in the function sub_49E098. The high CVSS score of 9.8 indicates a critical severity level. This score is derived from several factors, including the ease of exploitation, the potential impact, and the lack of authentication required to exploit the vulnerability.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attack: An attacker could exploit this vulnerability over the network by sending specially crafted packets to the router.
• Local Exploitation: If an attacker has local access to the device, they could exploit the stack overflow to gain elevated privileges.

Exploitation Methods:

• Buffer Overflow: The attacker can send a large amount of data to the list parameter, causing a stack overflow. This can lead to arbitrary code execution or a denial of service (DoS).
• Remote Code Execution (RCE): By carefully crafting the input, an attacker could execute arbitrary code on the device, potentially leading to full control over the router.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AC10 router

Affected Software Versions:

• US_AC10V4.0si_V16.03.10.13_cn

It is crucial to note that other versions of the firmware may also be affected, but this specific vulnerability has been identified in the mentioned version.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that the router's firmware is updated to the latest version provided by the manufacturer.
• Network Segmentation: Isolate the router from critical network segments to limit the potential impact of an exploit.
• Firewall Rules: Implement strict firewall rules to restrict access to the router's management interface.

Long-Term Strategies:

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

5. Impact on Cybersecurity Landscape

The discovery of this vulnerability highlights the ongoing challenges in securing Internet of Things (IoT) devices. Routers, being critical components of network infrastructure, are prime targets for attackers. The high CVSS score underscores the potential for significant damage if exploited, including data breaches, network disruptions, and unauthorized access to sensitive information.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: sub_49E098
• Parameter: list
• Type of Vulnerability: Stack Overflow

Exploitation Steps:

1. Identify the Target: Locate the Tenda AC10 router on the network.
2. Craft Malicious Input: Create a payload that exceeds the buffer size for the list parameter.
3. Send Payload: Transmit the crafted payload to the router, potentially via a network packet or a local command.
4. Exploit: If successful, the stack overflow will occur, leading to arbitrary code execution or a DoS condition.

References:

• Exploit Code Image
• Exploit Details

Conclusion: CVE-2023-45479 represents a significant risk to organizations and individuals using the Tenda AC10 router. Immediate mitigation steps, including firmware updates and network segmentation, are essential to protect against potential exploitation. Regular security audits and a proactive approach to patch management are crucial for maintaining a robust cybersecurity posture.