Vulnerability identifier: #VU15277

Vulnerability risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-8492

CWE-ID: CWE-94

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows Server
Operating systems & Components / Operating system
Windows
Operating systems & Components / Operating system

Vendor: Microsoft

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 session to bypass the Device Guard Code Integrity policy on the local machine.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows Server: 2016 - 2019 1803

Windows: 10 1607 - 10 1809

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8492

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.