Strix
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CVE-2019-15316

UnknownEPSS 0.39%

Last modified

CVE-2019-15316 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.39%

30.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
ValvesoftwareSteam Client<= 2019-08-20

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-15316?
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.
How severe is CVE-2019-15316?
Severity scoring for CVE-2019-15316 is pending analysis. The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2019-15316?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-15316?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST