HOMEVULNERABILITIESCVE-2017-17877
CRITICAL

CVE-2017-17877

NVD-CWE-noinfoPublished: December 27, 2017· Updated: Jun 17, 2026

9.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2017-17877 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

valvesoftware2 product(s)
steam link firmwaresteam link
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

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

All References (6)

→
https://blogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.htmlIssue Tracking · Third Party Advisory
→
https://github.com/ValveSoftware/steamlink-sdk#ssh-accessIssue Tracking · Third Party Advisory
→
https://github.com/ValveSoftware/steamlink-sdk/issues/119Issue Tracking · Third Party Advisory
→
https://blogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.htmlIssue Tracking · Third Party Advisory
→
https://github.com/ValveSoftware/steamlink-sdk#ssh-accessIssue Tracking · Third Party Advisory
→
https://github.com/ValveSoftware/steamlink-sdk/issues/119Issue Tracking · Third Party Advisory

Quick Facts

CVE IDCVE-2017-17877
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessNVD-CWE-noinfo
CISA KEVNo
Affected1 vendor(s)
PublishedDec 27, 2017

Related CVEs (NVD-CWE-noinfo)

CVE-2009-4519
10.0
CVE-2009-4538
10.0
CVE-2009-3847
10.0
CVE-2009-4368
10.0
CVE-2009-4294
10.0
CVE-2009-4594
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2017-17877 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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