| Package | Affected versions | Patched versions |
|---|---|---|
| steam client | ≤ 2019-08-20 |
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.
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