CVE-2020-15530

HIGH

Valve Steam Client 2.10.91.91 - Privilege Escalation via Weak Directory Permissions

Title source: llm
STIX 2.1

Description

An issue was discovered in Valve Steam Client 2.10.91.91. The installer allows local users to gain NT AUTHORITY\SYSTEM privileges because some parts of %PROGRAMFILES(X86)%\Steam and/or %COMMONPROGRAMFILES(X86)%\Steam have weak permissions during a critical time window. An attacker can make this time window arbitrarily long by using opportunistic locks.

References (1)

Core 1
Core References

Scores

CVSS v3 7.8
EPSS 0.0049
EPSS Percentile 38.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-362
Status published
Products (1)
valvesoftware/steam_client 2.10.91.91
Published Jul 05, 2020
Tracked Since Feb 18, 2026