CVE-2017-16936 Explained : Impact and Mitigation

A vulnerability related to directory traversal has been identified in the app_data_center on several Shenzhen Tenda devices, allowing remote attackers to access and read arbitrary files without authentication.

Understanding CVE-2017-16936

This CVE involves a directory traversal vulnerability in specific Shenzhen Tenda device models.

What is CVE-2017-16936?

The vulnerability allows remote unauthenticated attackers to read arbitrary files by exploiting a specific URI with directory traversal sequences.

The Impact of CVE-2017-16936

Attackers can access and read sensitive files on affected devices without authentication.

Technical Details of CVE-2017-16936

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability exists in the app_data_center of Shenzhen Tenda devices, including specific model versions, enabling unauthorized file access.

Affected Systems and Versions

Ac9 US_AC9V1.0BR_V15.03.05.14_multi_TD01
Ac9 ac9_kf_V15.03.05.19(6318_)_cn
Ac15 US_AC15V1.0BR_V15.03.05.18_multi_TD01
Ac15 US_AC15V1.0BR_V15.03.05.19_multi_TD01
Ac18 US_AC18V1.0BR_V15.03.05.05_multi_TD01
Ac18 ac18_kf_V15.03.05.19(6318_)_cn

Exploitation Mechanism

Attackers exploit the vulnerability by using a specific URI, cgi-bin/luci/request?op=1&path=, and employing directory traversal sequences following a /usb/ substring.

Mitigation and Prevention

Protecting systems from CVE-2017-16936 is crucial for maintaining security.

Immediate Steps to Take

Implement network segmentation to limit access to vulnerable devices.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and security patches for Shenzhen Tenda devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply patches provided by Shenzhen Tenda to fix the directory traversal vulnerability.