CVE-2017-17877 : Vulnerability Insights and Analysis

Valve Steam Link version 643 has a security vulnerability that allows remote attackers to potentially gain access by guessing a portion of the MAC address and attempting a root login.

Understanding CVE-2017-17877

Valve Steam Link version 643 vulnerability with SSH daemon enabled for local development.

What is CVE-2017-17877?

Valve Steam Link version 643 vulnerability exposes the device over the internet through IPv6 TCP port 22 by default.
Attackers can exploit this to gain access by guessing part of the MAC address and attempting a root login.

The Impact of CVE-2017-17877

Remote attackers can potentially access the device by exploiting the default settings.
This vulnerability can be used in conjunction with CVE-2017-17878.

Technical Details of CVE-2017-17877

Valve Steam Link version 643 security vulnerability details.

Vulnerability Description

When SSH daemon is enabled, the device becomes accessible over the internet through IPv6 TCP port 22 by default.
Attackers can guess a portion of the MAC address to attempt a root login.

Affected Systems and Versions

Product: Valve Steam Link version 643
Vendor: Valve
Version: 643

Exploitation Mechanism

Attackers exploit the default accessibility over IPv6 TCP port 22 to guess the MAC address and attempt a root login.

Mitigation and Prevention

Steps to address and prevent CVE-2017-17877.

Immediate Steps to Take

Disable SSH daemon if not required for local development.
Implement strong, unique passwords to prevent unauthorized access.

Long-Term Security Practices

Regularly monitor and update device firmware for security patches.
Implement network segmentation to restrict access to critical devices.

Patching and Updates

Check for firmware updates from Valve to address the security vulnerability.