PassMark PerformanceTest before 11.1 build 1012, BurnInTest before 11.1 build 1000, and OSForensics before 11.1 build 1016 contain a privilege escalation vulnerability in DirectIo64.sys that allows local users to issue arbitrary IN and OUT instructions to any x86 I/O port due to missing allowlist or port validation on exposed IOCTLs. Attackers can obtain a device handle and write to sensitive ports including the PS/2 controller port, CPU reset ports, CMOS configuration ports, and interrupt controller ports to cause an immediate system reset or other hardware-level manipulation from a standard user account.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 6
https://dkom.dev/posts/directio64-disclosure/
disclosure@vulncheck.com
https://github.com/floppywiggler/directio64-disclosure
disclosure@vulncheck.com
https://www.osforensics.com/whats-new.html
disclosure@vulncheck.com
https://www.passmark.com/products/burnintest/history.php
disclosure@vulncheck.com
https://www.passmark.com/products/performancetest/history.php
disclosure@vulncheck.com
https://www.vulncheck.com/advisories/passmark-performancetest-burnintest-and-os…
disclosure@vulncheck.com