CVE-2019-15316 - Vulnerability Details - OpenCVE

Description

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.

Published: 2019-08-21

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:*

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2019-6317	Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.

No CVSS v4.0

No CVSS v3.1

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Local

Access Complexity Medium

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.00051.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://amonitoring.ru/article/onemore_steam_eop_0day/
https://habr.com/ru/company/pm/blog/464367/
https://www.youtube.com/watch?v=I93aH86BUaE
https://www.youtube.com/watch?v=ZCHrjP0cMew

History

No history.

Subscriptions

Microsoft Windows

Valvesoftware Steam Client

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2019-08-21T19:36:06.000Z

Updated: 2024-08-05T00:42:03.701Z

Reserved: 2019-08-21T00:00:00.000Z

Link: CVE-2019-15316

Vulnrichment

No data.

NVD

Status : Modified

Published: 2019-08-21T20:15:12.930

Modified: 2024-11-21T04:28:26.183

Link: CVE-2019-15316

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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