CVE-2017-8336 Explained : Impact and Mitigation

A vulnerability was found on Securifi Almond, Almond+, and Almond 2015 devices running firmware AL-R096 that allows attackers to manipulate the $ra register stored on the stack, leading to a stack overflow.

Understanding CVE-2017-8336

This CVE describes a vulnerability in Securifi Almond devices that enables attackers to take control of the device by exploiting a stack overflow issue.

What is CVE-2017-8336?

The vulnerability in Securifi Almond devices running firmware AL-R096 allows attackers to manipulate the $ra register through a stack overflow, ultimately gaining control of the device.

The Impact of CVE-2017-8336

Exploiting this vulnerability enables attackers to inject and execute custom payloads, leading to complete control of the affected device.

Technical Details of CVE-2017-8336

This section provides a detailed technical overview of the vulnerability.

Vulnerability Description

The vulnerability allows attackers to trigger a stack overflow by manipulating POST parameters related to configuring routes on the device.
By exploiting the stack overflow, attackers can control the $ra register stored on the stack.

Affected Systems and Versions

Securifi Almond, Almond+, and Almond 2015 devices running firmware AL-R096 are affected by this vulnerability.

Exploitation Mechanism

The POST parameter "gateway" is used to trigger the stack overflow and gain control over the $ra register after 1546 characters.
Attackers can inject and execute custom payloads by manipulating the POST parameters.

Mitigation and Prevention

Protecting systems from CVE-2017-8336 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of Securifi Almond devices to the latest version that addresses the vulnerability.
Monitor network traffic for any suspicious activities that may indicate exploitation attempts.

Long-Term Security Practices

Implement network segmentation to isolate IoT devices from critical systems.
Regularly audit and update firmware to patch known vulnerabilities.

Patching and Updates

Apply security patches provided by Securifi for the affected devices to mitigate the vulnerability.