CVE-2018-14557 : Vulnerability Insights and Analysis

A vulnerability has been found in Tenda AC7, AC9, and AC10 devices due to a buffer overflow in the web server, potentially allowing attackers to execute arbitrary code.

Understanding CVE-2018-14557

This CVE identifies a critical security issue in Tenda routers that could compromise the integrity and security of the devices.

What is CVE-2018-14557?

The vulnerability in Tenda routers allows attackers to trigger a buffer overflow by manipulating page parameters in a post request, leading to potential code execution.

The Impact of CVE-2018-14557

Exploitation of this vulnerability could result in unauthorized access to the affected routers, allowing attackers to take control of the devices and potentially launch further attacks within the network.

Technical Details of CVE-2018-14557

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The issue arises from the improper handling of page parameters in post requests, where a buffer overflow occurs due to the direct writing of values to a local variable on the stack, overriding the function's return address.

Affected Systems and Versions

Tenda AC7 devices up to V15.03.06.44_CN(AC7) firmware
Tenda AC9 devices up to V15.03.05.19(6318)_CN(AC9) firmware
Tenda AC10 devices up to V15.03.06.23_CN(AC10) firmware

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious post requests with manipulated page parameters, causing a buffer overflow and potentially executing arbitrary code on the affected devices.

Mitigation and Prevention

Protecting systems from CVE-2018-14557 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches or firmware updates provided by Tenda to address the vulnerability.
Monitor network traffic for any suspicious activities that could indicate exploitation attempts.

Long-Term Security Practices

Regularly update router firmware to ensure the latest security patches are in place.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

Tenda has likely released patches or firmware updates to mitigate the CVE-2018-14557 vulnerability. It is crucial to promptly apply these updates to secure the affected devices.