CVE-2020-15530 — HIGH (7.8)

Vulnerability 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.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Valvesoftware	Steam Client	2.10.91.91

Related Weaknesses (CWE)

CWE-362

References

http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-ExploitThird Party Advisory
http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-ExploitThird Party Advisory

FAQ

What is CVE-2020-15530?

CVE-2020-15530 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 %COMMONPROGRAMF...

How severe is CVE-2020-15530?

CVE-2020-15530 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2020-15530?

Check the references section above for vendor advisories and patch information. Affected products include: Valvesoftware Steam Client.