CVE-2017-17877

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.

9.8

CVSS

Severity: Critical

CVSS 3.0 •

CVSS 2.0 •

EPSS 1.34% Top 25%

Third-Party Advisory davidmanouchehri.com Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://blogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.html	issue tracking third party advisory
https://github.com/ValveSoftware/steamlink-sdk/issues/119	issue tracking third party advisory
https://github.com/ValveSoftware/steamlink-sdk#ssh-access	issue tracking third party advisory

Frequently Asked Questions

What is the severity of CVE-2017-17877?: CVE-2017-17877 has been scored as a critical severity vulnerability.
How to fix CVE-2017-17877?: To fix CVE-2017-17877, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-17877 being actively exploited in the wild?: It is possible that CVE-2017-17877 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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