CVE-2019-15316

Public Exploit

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.

Category

7.0
CVSS
Severity: High
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.05%
Third-Party Advisory amonitoring.ru Third-Party Advisory habr.com Third-Party Advisory youtube.com Third-Party Advisory youtube.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://amonitoring.ru/article/onemore_steam_eop_0day/ third party advisory
https://habr.com/ru/company/pm/blog/464367/ third party advisory
https://www.youtube.com/watch?v=I93aH86BUaE third party advisory exploit
https://www.youtube.com/watch?v=ZCHrjP0cMew third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2019-15316?
CVE-2019-15316 has been scored as a high severity vulnerability.
How to fix CVE-2019-15316?
To fix CVE-2019-15316, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-15316 being actively exploited in the wild?
It is possible that CVE-2019-15316 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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