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MitreCVE-2017-17877

HistoryDec 27, 2017 - 5:08 p.m.

CVE-2017-17877

2017-12-2717:08:21

mitre

web.nvd.nist.gov

valve

steam link

build 643

ssh daemon

remote access

cve-2017-17877

security vulnerability

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.1

Confidence

High

EPSS

0.008

Percentile

81.4%

JSON

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.

Affected configurations

Nvd

Node

valvesoftwaresteam_link_firmwareRange<644

AND

valvesoftwaresteam_linkMatch-

VendorProductVersionCPE
valvesoftwaresteam_link_firmware*cpe:2.3:o:valvesoftware:steam_link_firmware:*:*:*:*:*:*:*:*
valvesoftwaresteam_link-cpe:2.3:h:valvesoftware:steam_link:-:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
valvesoftware	steam_link_firmware	*	cpe:2.3:o:valvesoftware:steam_link_firmware::::::::
valvesoftware	steam_link	-	cpe:2.3:h:valvesoftware:steam_link:-:::::::*

References

blogger.davidmanouchehri.com/2017/12/steam-link-security-remotely-insecure.html

github.com/ValveSoftware/steamlink-sdk#ssh-access

github.com/ValveSoftware/steamlink-sdk/issues/119

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

AI Score

9.1

Confidence

High

EPSS

0.008

Percentile

81.4%

JSON

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