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CVE-2017-17877

9.8 · CRITICAL

An issue was discovered in Valve Steam Link build 643.

Published Dec 27, 2017EPSS 4.10%

Overview

CVE-2017-17877 is a critical-severity vulnerability. It was published on December 27, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An issue was discovered in Valve Steam Link build 643. When the SSH daemon is enabled for local development, the device is publicly available via IPv6 TCP port 22 over the internet (with stateless address autoconfiguration) by default, which makes it easier for remote attackers to obtain access by guessing 24 bits of the MAC address and attempting a root login. This can be exploited in conjunction with CVE-2017-17878.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refblogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.htmlGitHubgithub.com/ValveSoftware/steamlink-sdk#ssh-accessGitHubgithub.com/ValveSoftware/steamlink-sdk/issues/119Refblogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.htmlGitHubgithub.com/ValveSoftware/steamlink-sdk#ssh-accessGitHubgithub.com/ValveSoftware/steamlink-sdk/issues/119

How CyberStrike helps

Frequently asked questions

What is CVE-2017-17877?

CVE-2017-17877 is a critical-severity vulnerability. It was published on December 27, 2017 and has a CVSS 3.0 base score of 9.8 (CRITICAL).

How severe is CVE-2017-17877?

This vulnerability has a CVSS 3.0 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2017-17877?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2017-17877?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2017-17877 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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