Vulnerability identifier: #VU19320

Vulnerability risk: Low

CVSSv3.1: 5.6 [CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1167

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
System.Management.Automation
Server applications / Remote management servers, RDP, SSH

Vendor: Microsoft

Description

The vulnerability allows a local attacker to gain unauthorized access to sensitive information.

The vulnerability exists due to improper access restrictions in Windows Defender Application Control (WDAC). A local administrator can bypass WDAC enforcement, circumvent PowerShell Core Constrained Language Mode on the machine and access resources in an unintended way.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

System.Management.Automation: 6.1.0 - 6.2.0

---

External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1167

---

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.