CVE-2024-25751

Comprehensive Technical Analysis of CVE-2024-25751

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2024-25751 Description: A Stack Based Buffer Overflow vulnerability in Tenda AC9 v.3.0 with firmware version v.15.03.06.42_multi allows a remote attacker to execute arbitrary code via the fromSetSysTime function. CVSS Score: 9.8

Severity Evaluation: 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 vulnerability allows an attacker to execute arbitrary code, potentially gaining full control over the affected device.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can exploit this vulnerability over the network without requiring physical access to the device.
• Network-Based Attacks: The vulnerability can be triggered via network requests, making it a prime target for remote attackers.

Exploitation Methods:

• Buffer Overflow: The attacker can send a specially crafted payload to the fromSetSysTime function, causing a stack-based buffer overflow.
• Code Execution: By overwriting the return address on the stack, the attacker can redirect the execution flow to their malicious code.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda AC9 v.3.0

Affected Software Versions:

• Firmware version v.15.03.06.42_multi

Note: Other versions of the firmware and hardware may also be affected but have not been explicitly mentioned in the CVE description.

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Apply the latest firmware update 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 device from untrusted networks.

Long-Term Strategies:

• Regular Patching: Ensure that all IoT devices are regularly updated with the latest firmware and security patches.
• Intrusion Detection: Deploy intrusion detection systems (IDS) to monitor for suspicious network activity.
• Security Audits: Conduct regular security audits and vulnerability assessments on all IoT devices.

5. Impact on Cybersecurity Landscape

Broader Implications:

• IoT Security: This vulnerability highlights the ongoing challenges in securing IoT devices, which are often deployed in large numbers and can be difficult to update.
• Supply Chain Risks: Vulnerabilities in widely used devices can have cascading effects, impacting multiple organizations and industries.
• Remote Attack Surface: The ability to exploit this vulnerability remotely underscores the need for robust network security measures.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: fromSetSysTime
• Type of Vulnerability: Stack Based Buffer Overflow
• Exploitation: The vulnerability can be exploited by sending a maliciously crafted payload that overflows the stack buffer, allowing for arbitrary code execution.

Detection and Response:

• Log Analysis: Monitor system logs for unusual activity related to the fromSetSysTime function.
• Behavioral Analysis: Use behavioral analysis tools to detect anomalous behavior that may indicate an exploitation attempt.
• Incident Response: Have an incident response plan in place to quickly address any detected exploitation attempts.

References:

• Third Party Advisory

Conclusion: CVE-2024-25751 represents a critical vulnerability in Tenda AC9 v.3.0 devices running firmware version v.15.03.06.42_multi. Immediate action is required to mitigate the risk of remote code execution. Organizations should prioritize firmware updates, network segmentation, and robust monitoring to protect against potential exploitation. The broader cybersecurity community should take note of the ongoing challenges in securing IoT devices and the need for proactive security measures.