CVEvulnerability

CVE-2019-15316

7.0 HIGH Published 2019-08-21 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2019-08-21
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.0 ([email protected])
7.0 HIGH — CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
6.9 MEDIUM — AV:L/AC:M/Au:N/C:C/I:C/A:C
Weaknesses
CWE-367, CWE-732

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.

Affected configurations

• valvesoftware steam client (<= 2019-08-20)

Related

Weakness · CWE (2)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource weakness

References