Microsoft Windows Task Scheduler ALPC Interface Local Privilege Escalation Vulnerability

Bugtraq ID:	105153
Class:	Design Error
CVE:	CVE-2018-8440
Remote:	No
Local:	Yes
Published:	Aug 27 2018 12:00AM
Updated:	Sep 11 2018 06:00PM
Credit:	SandboxEscaper
Vulnerable:	Microsoft Windows Server 2016 0 Microsoft Windows Server 2012 R2 0 Microsoft Windows Server 2012 0 Microsoft Windows Server 2008 R2 for x64-based Systems SP1 Microsoft Windows Server 2008 R2 for Itanium-based Systems SP1 Microsoft Windows Server 2008 for x64-based Systems SP2 Microsoft Windows Server 2008 for Itanium-based Systems SP2 Microsoft Windows Server 2008 for 32-bit Systems SP2 Microsoft Windows Server 1803 0 Microsoft Windows Server 1709 0 Microsoft Windows RT 8.1 Microsoft Windows 8.1 for 64-bit Systems 0 Microsoft Windows 8.1 for 32-bit Systems 0 Microsoft Windows 7 for x64-based Systems SP1 Microsoft Windows 7 for 32-bit Systems SP1 Microsoft Windows 10 Version 1803 for x64-based Systems 0 Microsoft Windows 10 Version 1803 for 32-bit Systems 0 Microsoft Windows 10 version 1709 for x64-based Systems 0 Microsoft Windows 10 version 1709 for 32-bit Systems 0 Microsoft Windows 10 version 1703 for x64-based Systems 0 Microsoft Windows 10 version 1703 for 32-bit Systems 0 Microsoft Windows 10 Version 1607 for x64-based Systems 0 Microsoft Windows 10 Version 1607 for 32-bit Systems 0 Microsoft Windows 10 for x64-based Systems 0 Microsoft Windows 10 for 32-bit Systems 0 Microsoft Windows 0
Not Vulnerable:

Microsoft Windows Task Scheduler ALPC Interface Local Privilege Escalation Vulnerability

Microsoft Windows Task Scheduler is prone to a local privilege-escalation vulnerability.

A local attacker can exploit this issue to execute arbitrary code with SYSTEM privileges.

Microsoft Windows Task Scheduler ALPC Interface Local Privilege Escalation Vulnerability

The researcher who discovered this issue has created a proof-of-concept. Please see the references for more information.
Reports indicate that this issue is being exploited in the wild. Please see the references for more information.

Microsoft Windows Task Scheduler ALPC Interface Local Privilege Escalation Vulnerability

Solution:
Updates are available. Please see the references or vendor advisory for more information.

Microsoft Windows Task Scheduler ALPC Interface Local Privilege Escalation Vulnerability

References:

• Microsoft Homepage (Microsoft)
  
• SandboxEscaper POC (SandboxEscaper)
  
• Task Scheduler ALPC exploit high level analysis (Kevin Beaumont)
  
• CVE-2018-8440 | Windows ALPC Elevation of Privilege Vulnerability (Microsoft)
  
• Vulnerability Note VU#906424 Microsoft Windows task scheduler contains a local p (CERT)