Malicious File Upload- Intex Router N-150 | CVE-2018-12528

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By- Navina Asrani

Hi Readers,

Recently while tinkering with my wifi router, I was curious to find if it has possible loopholes and vulnerabilities. Curious to explore its functionalities, I started probing with the options.

Title of the Vulnerability:  Malicious File Upload

Vulnerability Class: Firmware Compromise/ File Upload

Technical Details & Description: The firmware allows malicious files to be uploaded without any checking of extensions and allows filed to be uploaded.

CVE ID allocated: - CVE-2018-12528

Product & Service Introduction: InteX Router

Steps to Re-Produce –
1.       Visit the application
2.       Go to the advanced settings post login
3.       Under backup- restore page upload any random file extension and hit go.
4.       Upon the file being upload, the firmware will get rebooted accepting the arbitrary file.
Exploitation Technique: A attacker can upload malicious files to compromise the firmware.
Severity Level: High
Security Risk:
The presence of such a risk can lead to router compromise.
Affected Product Version: Intex Router n150
Solution - Fix & Patch: The application code should be configured to implement extension checking for uploading only configuration extension file.

POCs:




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