CVE Vulnerability

CVE-2019-15316

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITYSYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.

6.9 /10

CVSS v2.0 :

V3 Legend

Vector :

Exploitability : 3.4 / Impact : 10

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Scope

7 /10

CVSS v3.0 : HIGH

V3 Legend

Vector :

Exploitability : 1 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://habr.com/ru/company/pm/blog/464367/ Third Party Advisory
https://www.youtube.com/watch?v=ZCHrjP0cMew Exploit Third Party Advisory
https://amonitoring.ru/article/onemore_steam_eop_0day/ Third Party Advisory
https://www.youtube.com/watch?v=I93aH86BUaE Exploit Third Party Advisory
Configurations

Configuration 1
Information

Published : 2019-08-21 08:15

Updated : 2020-08-24 05:37

NVD link : CVE-2019-15316

Mitre link : CVE-2019-15316

Products Affected

Steam Client

Valvesoftware

CWE
CWE-367

CWE-732