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Vigil@nce - Windows: privilege escalation via Create Process

February 2015 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

A local attacker can use the CreateProcess() function on Windows,
in order to escalate his privileges.

Impacted products: Windows 2008 R0, Windows 2008 R2, Microsoft
Windows 2012, Windows 7, Windows 8, Windows RT

Severity: 2/4

Creation date: 10/02/2015

DESCRIPTION OF THE VULNERABILITY

The CreateProcess() function of Windows creates a new process on
the system.

The SeAssignPrimaryTokenPrivilege (SE_ASSIGNPRIMARYTOKEN_NAME)
privilege is used to change the "primary token" of a process.

However, when a process is created with SeAssignPrimaryTokenPrivilege,
Windows does not correctly manage the impersonation.

A local attacker can therefore use the CreateProcess() function on
Windows, in order to escalate his privileges.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Windows-privilege-escalation-via-Create-Process-16165


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