What is CVE-2019-15316?

CVE-2019-15316 is a vulnerability in the Valve Steam Client for Windows that allows for privilege escalation via weak folder permissions.

How severe is CVE-2019-15316?

CVE-2019-15316 has a severity rating of high, with a severity value of 7.

How can CVE-2019-15316 be exploited?

CVE-2019-15316 can be exploited by leveraging a TOCTOU race condition using CreateMountPoint.exe and SetOpLock.exe to escalate privileges to NT AUTHORITY\SYSTEM.

Is Microsoft Windows affected by CVE-2019-15316?

No, Microsoft Windows is not affected by CVE-2019-15316.

What are the Common Weakness Enumeration (CWE) IDs associated with CVE-2019-15316?

CVE-2019-15316 is associated with CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')), CWE-367 (Time-of-Check Time-of-Use (TOCTOU) Race Condition), and CWE-732 (Incorrect Permission Assignment for Critical Resource).

Vulnerability/
CVE-2019-15316

high

CWE

367 732 362

21/8/2019

5/8/2024

CVE-2019-15316: Race Condition

First published: Wed Aug 21 2019(Updated: )

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.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Steam Client	<=2019-08-20
Microsoft Windows Operating System

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Frequently Asked Questions

What is CVE-2019-15316?
CVE-2019-15316 is a vulnerability in the Valve Steam Client for Windows that allows for privilege escalation via weak folder permissions.
How severe is CVE-2019-15316?
CVE-2019-15316 has a severity rating of high, with a severity value of 7.
How can CVE-2019-15316 be exploited?
CVE-2019-15316 can be exploited by leveraging a TOCTOU race condition using CreateMountPoint.exe and SetOpLock.exe to escalate privileges to NT AUTHORITY\SYSTEM.
Is Microsoft Windows affected by CVE-2019-15316?
No, Microsoft Windows is not affected by CVE-2019-15316.
What are the Common Weakness Enumeration (CWE) IDs associated with CVE-2019-15316?
CVE-2019-15316 is associated with CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')), CWE-367 (Time-of-Check Time-of-Use (TOCTOU) Race Condition), and CWE-732 (Incorrect Permission Assignment for Critical Resource).

agent/references
agent/type
collector/mitre-cve
source/MITRE
agent/last-modified-date
agent/author
agent/weakness
agent/severity
agent/description
agent/first-publish-date
agent/event
agent/source
agent/softwarecombine
agent/tags
collector/nvd-index
agent/software-canonical-lookup-request
vendor/valvesoftware
canonical/steam client
version/steam client/2019-08-20
vendor/microsoft
canonical/microsoft windows operating system

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