CVE-2025-22946

Comprehensive Technical Analysis of CVE-2025-22946

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-22946 Description: The Tenda ac9 v1.0 firmware v15.03.05.19 contains a stack overflow vulnerability in the /goform/SetOnlineDevName endpoint. This vulnerability can be exploited to achieve remote arbitrary code execution. CVSS Score: 9.8

Severity Evaluation:

• CVSS Base Score: 9.8 (Critical)
• Impact Metrics:
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: High
• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: None
  • Scope: Unchanged

The high CVSS score indicates that this vulnerability is critical and poses a significant risk to affected systems. The combination of high impact metrics and low exploitability metrics makes it a prime target for attackers.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Remote Exploitation: An attacker can send a specially crafted HTTP request to the /goform/SetOnlineDevName endpoint, causing a stack overflow.
• Network-Based Attacks: Given the network attack vector, this vulnerability can be exploited over the internet, making it accessible to a wide range of potential attackers.

Exploitation Methods:

• Buffer Overflow: The vulnerability is likely due to improper bounds checking in the sprintf function, leading to a stack overflow.
• Arbitrary Code Execution: By carefully crafting the input, an attacker can overwrite the return address on the stack and redirect the execution flow to injected malicious code.

3. Affected Systems and Software Versions

Affected Systems:

• Tenda ac9 v1.0 devices running firmware version v15.03.05.19.

Software Versions:

• Firmware version v15.03.05.19 for Tenda ac9 v1.0.

4. Recommended Mitigation Strategies

Immediate Mitigation:

• Network Segmentation: Isolate affected devices from critical networks to limit potential damage.
• Firewall Rules: Implement strict firewall rules to block unauthorized access to the /goform/SetOnlineDevName endpoint.
• Monitoring: Increase monitoring and logging for suspicious activities targeting the affected endpoint.

Long-Term Mitigation:

• Firmware Update: Apply the latest firmware update from Tenda as soon as it becomes available.
• Patch Management: Implement a robust patch management process to ensure timely updates and patches.
• Security Audits: Conduct regular security audits and vulnerability assessments to identify and mitigate similar issues.

5. Impact on Cybersecurity Landscape

Immediate Impact:

• Increased Risk: Devices running the affected firmware are at high risk of being compromised, leading to potential data breaches, unauthorized access, and service disruptions.
• Exploitation: Given the critical nature of the vulnerability, it is likely to be exploited in the wild, especially by advanced threat actors.

Long-Term Impact:

• Reputation Damage: Tenda's reputation may be affected if the vulnerability is widely exploited.
• Industry Awareness: This incident highlights the importance of secure coding practices and regular security audits in the IoT and networking device industry.

6. Technical Details for Security Professionals

Vulnerability Details:

• Endpoint: /goform/SetOnlineDevName
• Function: sprintf
• Issue: Stack overflow due to improper bounds checking.

Exploitation Steps:

1. Identify Target: Locate Tenda ac9 v1.0 devices running the vulnerable firmware.
2. Craft Payload: Create a malicious HTTP request targeting the /goform/SetOnlineDevName endpoint.
3. Send Request: Use tools like curl or custom scripts to send the crafted request.
4. Execute Code: Overwrite the return address and inject malicious code to achieve arbitrary code execution.

Detection and Response:

• Intrusion Detection Systems (IDS): Deploy IDS to detect and alert on suspicious traffic targeting the vulnerable endpoint.
• Incident Response: Develop an incident response plan to quickly identify and mitigate any exploitation attempts.

Conclusion: CVE-2025-22946 represents a critical vulnerability that requires immediate attention from cybersecurity professionals. Effective mitigation strategies, including network segmentation, firewall rules, and timely firmware updates, are essential to protect affected systems. Regular security audits and adherence to secure coding practices can help prevent similar vulnerabilities in the future.