Security restrictions bypass in Microsoft Windows Device Guard

Published: 2018-08-14 23:24:49
Severity Low
Patch available YES
Number of vulnerabilities 2
CVE ID CVE-2018-8204
CVE-2018-8200
CVSSv3 4.6 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
4.6 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]
CWE ID CWE-94
Exploitation vector Local
Public exploit N/A
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 10
Windows Server 2016
Vendor URL Microsoft

Security Advisory

1) Code injection

Description

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The vulnerability exists due to an error when PowerShell exposes functions and processes user supplied code. A local attacker can inject code into a trusted PowerShell process to bypass the Device Guard Code Integrity policy on the local machine.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8204

2) Code injection

Description

The vulnerability allows a local attacker to bypass security restrictions on the target system.

The vulnerability exists due to an error when PowerShell exposes functions and processes user supplied code. A local attacker can inject code into a trusted PowerShell process to bypass the Device Guard Code Integrity policy on the local machine.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8200

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