CVE-2025-15047

Comprehensive Technical Analysis of CVE-2025-15047

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-15047 CVSS Score: 9.8

The vulnerability in question is a stack-based buffer overflow affecting the Tenda WH450 router, specifically in the HTTP Request Handler component. The vulnerability is triggered by manipulating the "Username" argument in the /goform/PPTPDClient file. Given the high CVSS score of 9.8, this vulnerability is considered critical. The severity is justified by the potential for remote exploitation, which can lead to arbitrary code execution, system crashes, or unauthorized access to sensitive information.

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.
• Manipulation of HTTP Requests: The attacker can craft malicious HTTP requests targeting the /goform/PPTPDClient endpoint with a specially crafted "Username" parameter.

Exploitation Methods:

• Buffer Overflow: By sending a long string as the "Username" parameter, the attacker can overflow the stack buffer, leading to potential code execution or denial of service (DoS).
• Code Execution: If the attacker can control the overflow, they may inject and execute arbitrary code, potentially gaining control over the device.

3. Affected Systems and Software Versions

Affected Device:

• Tenda WH450 router

Affected Software Version:

• Firmware version 1.0.0.18

Component:

• HTTP Request Handler, specifically the /goform/PPTPDClient file

4. Recommended Mitigation Strategies

Immediate Actions:

• Firmware Update: Ensure that the Tenda WH450 router is updated to the latest firmware version that addresses this vulnerability.
• Network Segmentation: Isolate the router from critical networks 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 activity targeting the router.
• Access Control: Implement strong access controls and authentication mechanisms for the router's management interface.

5. Impact on Cybersecurity Landscape

The discovery and exploitation of this vulnerability highlight the ongoing risks associated with IoT devices, particularly routers, which are often targeted due to their critical role in network infrastructure. The high CVSS score underscores the potential for significant damage, including data breaches, network disruptions, and unauthorized access. This vulnerability serves as a reminder of the importance of robust security practices, including regular updates and proactive monitoring.

6. Technical Details for Security Professionals

Vulnerability Details:

• Type: Stack-based buffer overflow
• Location: /goform/PPTPDClient file in the HTTP Request Handler component
• Trigger: Manipulation of the "Username" argument in HTTP requests

Exploit Availability:

• The exploit has been made public, and proof-of-concept (PoC) code is available on GitHub.

References:

• GitHub PoC
• GitHub Reproduce
• VulDB Entry
• VulDB ID
• VulDB Submission
• Tenda Official Website

Mitigation Steps:

1. Identify Affected Devices: Conduct an inventory to identify all Tenda WH450 routers in use.
2. Update Firmware: Apply the latest firmware update from Tenda.
3. Monitor Network Traffic: Use network monitoring tools to detect and block suspicious HTTP requests targeting the vulnerable endpoint.
4. Implement Access Controls: Ensure that only authorized personnel have access to the router's management interface.

By following these steps, organizations can mitigate the risks associated with CVE-2025-15047 and enhance their overall cybersecurity posture.