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Vulnerability of Windows: privilege escalation via Task Scheduler ALPC Interface

Synthesis of the vulnerability 

An attacker can bypass restrictions via Task Scheduler ALPC Interface of Windows, in order to escalate his privileges.
Impacted systems: Windows 10, Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 2016, Windows 7, Windows 8, Windows RT.
Severity of this alert: 2/4.
Creation date: 28/08/2018.
Références of this alert: CERTFR-2018-ALE-009, CVE-2018-8440, VIGILANCE-VUL-27095, VU#906424.

Description of the vulnerability 

An attacker can bypass restrictions via Task Scheduler ALPC Interface of Windows, in order to escalate his privileges.
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This computer vulnerability alert impacts software or systems such as Windows 10, Windows 2008 R0, Windows 2008 R2, Windows 2012, Windows 2016, Windows 7, Windows 8, Windows RT.

Our Vigil@nce team determined that the severity of this computer threat alert is medium.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this security vulnerability.

Solutions for this threat 

Windows: patch of September 2018.
A patch is indicated in information sources.

Windows: workaround for Task Scheduler ALPC Interface.
A workaround is to set an ACE on C:\Windows\Tasks:
  https://www.cert.ssi.gouv.fr/alerte/CERTFR-2018-ALE-009/
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Computer vulnerabilities tracking service 

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