EUVD-2023-30804

Comprehensive Technical Analysis of EUVD-2023-30804

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The vulnerability identified in Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn involves a stack overflow in the sub_46AC38 function. This flaw can be exploited to cause a Denial of Service (DoS) or execute arbitrary code via a crafted payload.

Severity Evaluation: The CVSS (Common Vulnerability Scoring System) base score of 9.8 indicates a critical severity level. The vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H breaks down as follows:

• AV:N (Attack Vector: Network) - The vulnerability is exploitable over the network.
• AC:L (Attack Complexity: Low) - The attack requires low complexity.
• PR:N (Privileges Required: None) - No privileges are required to exploit the vulnerability.
• UI:N (User Interaction: None) - No user interaction is required.
• S:U (Scope: Unchanged) - The vulnerability does not change the security scope.
• C:H (Confidentiality: High) - High impact on confidentiality.
• I:H (Integrity: High) - High impact on integrity.
• A:H (Availability: High) - High impact on availability.

Given these metrics, the vulnerability poses a significant risk to affected systems.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Network-Based Attacks: Since the vulnerability is exploitable over the network, attackers can target the device remotely.
• Crafted Payloads: Attackers can send specially crafted packets to the device, triggering the stack overflow in the sub_46AC38 function.

Exploitation Methods:

• DoS Attacks: By sending malformed packets, attackers can cause the device to crash, leading to a Denial of Service.
• Arbitrary Code Execution: More sophisticated attackers can craft payloads that execute arbitrary code, potentially leading to full system compromise.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AC10 devices running firmware version US_AC10V4.0si_V16.03.10.13_cn.

Software Versions:

• Specifically, the vulnerability affects the firmware version V16.03.10.13.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that all Tenda AC10 devices are updated to the latest firmware version that addresses this vulnerability.
• Network Segmentation: Isolate affected devices from critical networks to limit the potential impact of an attack.
• Firewall Rules: Implement strict firewall rules to restrict access to the device, allowing only trusted sources.

Long-Term Strategies:

• Regular Patching: Establish a regular patching and update schedule for all network devices.
• Intrusion Detection Systems (IDS): Deploy IDS to monitor for suspicious network activity targeting the device.
• Security Audits: Conduct regular security audits to identify and mitigate potential vulnerabilities.

5. Impact on European Cybersecurity Landscape

Regional Impact:

• Critical Infrastructure: If Tenda AC10 devices are used in critical infrastructure, the vulnerability could have significant implications for national security.
• Consumer Devices: Widespread use of Tenda AC10 in consumer settings could lead to large-scale attacks, affecting individual users and small businesses.
• Regulatory Compliance: Organizations must ensure compliance with EU regulations such as GDPR, which mandates robust security measures to protect personal data.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: sub_46AC38
• Type of Vulnerability: Stack overflow
• Exploitation: Crafted payloads can trigger the overflow, leading to DoS or arbitrary code execution.

Detection and Monitoring:

• Log Analysis: Monitor device logs for unusual activity or crashes.
• Network Traffic Analysis: Use network monitoring tools to detect anomalous traffic patterns that may indicate an exploitation attempt.

References:

• GitHub Repository: Tenda AC10 Vulnerability Details
• Aliases: CVE-2023-27014, GSD-2023-27014

Conclusion: The vulnerability in Tenda AC10 US_AC10V4.0si_V16.03.10.13_cn is critical and requires immediate attention. Organizations and individuals using the affected devices should prioritize updating to the latest firmware and implementing robust security measures to mitigate the risk of exploitation. The European cybersecurity landscape must remain vigilant against such vulnerabilities to protect both critical infrastructure and consumer devices.