CVE-2020-16886 MEDIUM

CVE-2020-16886: PowerShellGet Module WDAC Security Feature Bypass Vulnerability

Vendor Microsoft
Product PowerShellGet 2.2.5
Published October 16, 2020
Last update August 4, 2024

CVSS base score

5.3/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

What the vulnerability does

01Description

<p>A security feature bypass vulnerability exists in the PowerShellGet V2 module. An attacker who successfully exploited this vulnerability could bypass WDAC (Windows Defender Application Control) policy and execute arbitrary code on a policy locked-down machine.</p> <p>An attacker must have administrator privileges to create a configuration that includes installing PowerShellGet V2 module onto a machine from the PowerShell Gallery. The WDAC policy must be configured to allow the module to run. After this is done, PowerShell script can be injected and run fully trusted, allowing the attacker arbitrary code execution on the machine.</p> <p>The update addresses the vulnerability by changing how URLs are processed.</p>

Key dates

02Disclosure timeline

October 16, 2020 CVE published
August 4, 2024 Record updated