cve/2020/CVE-2020-15530.md

CVE-2020-15530

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.

POC

Reference

• http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html
• http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html

Github

No PoCs found on GitHub currently.