CVE-2023-51968

Comprehensive Technical Analysis of CVE-2023-51968

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2023-51968 Description: Tenda AX1803 v1.0.0.1 contains a stack overflow via the adv.iptv.stballvlans parameter in the function getIptvInfo. CVSS Score: 9.8

The CVSS score of 9.8 indicates a critical vulnerability. This high score is likely due to the potential for remote code execution, the ease of exploitation, and the significant impact on the confidentiality, integrity, and availability of the affected system.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted request to the getIptvInfo function with a malicious adv.iptv.stballvlans parameter, causing a stack overflow.
• Network-Based Attacks: Given that the Tenda AX1803 is a router, the attack can be conducted over the network, making it accessible to remote attackers.

Exploitation Methods:

• Buffer Overflow: The attacker can exploit the stack overflow by sending a large amount of data to the adv.iptv.stballvlans parameter, which can overwrite the stack and potentially execute arbitrary code.
• Code Execution: If the attacker can control the execution flow, they may inject malicious code to gain control over the device.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AX1803 routers running firmware version v1.0.0.1.

Software Versions:

• The vulnerability specifically affects Tenda AX1803 v1.0.0.1. Other versions may also be affected but have not been explicitly mentioned in the CVE details.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Upgrade the firmware to a version that addresses this vulnerability. If an update is not available, consider disabling remote management features.
• 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: Ensure that all network devices are regularly updated with the latest security patches.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious activity that may indicate an exploitation attempt.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate potential risks.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Compromised Devices: Routers are critical network devices, and their compromise can lead to significant disruptions and data breaches.
• Lateral Movement: An attacker can use a compromised router to pivot and attack other devices within the network.

Long-Term Impact:

• Increased Awareness: This vulnerability highlights the importance of securing IoT and network devices, which are often overlooked in security strategies.
• Enhanced Security Measures: Vendors may be prompted to improve their security practices and implement more robust testing procedures.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: getIptvInfo
• Parameter: adv.iptv.stballvlans
• Type of Vulnerability: Stack overflow

Exploitation Steps:

1. Identify Target: Locate a Tenda AX1803 router running the vulnerable firmware version.
2. Craft Payload: Create a payload that exceeds the buffer size for the adv.iptv.stballvlans parameter.
3. Send Request: Send the crafted request to the getIptvInfo function.
4. Execute Code: If successful, the stack overflow will allow the attacker to execute arbitrary code on the device.

Detection and Monitoring:

• Log Analysis: Monitor router logs for unusual activity or repeated failed requests to the getIptvInfo function.
• Anomaly Detection: Use anomaly detection tools to identify abnormal traffic patterns that may indicate an exploitation attempt.

Conclusion: CVE-2023-51968 represents a critical vulnerability in Tenda AX1803 routers that can be exploited remotely. Immediate mitigation strategies include firmware updates, network segmentation, and strict firewall rules. Long-term, organizations should focus on regular patching, intrusion detection, and comprehensive security audits to protect against similar vulnerabilities.

References:

• Tenda AX1803 Buffer Overflow in getIptvInfo
• cve@mitre.org
• af854a3a-2127-422b-91ae-364da2661108