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

Quick assessment

Affected
Microsoft PowerShellGet 2.2.5
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

PowerShellGet V2是个人开发者的一个Powershell的包管理工具。该软件用于查找、安装、更新powershell产品。 PowerShellGet V2 模块存在安全漏洞，该漏洞源于存在安全功能绕过漏洞。攻击者可利用该漏洞可能会绕过 WDAC（Windows Defender 应用程序控制）策略并在策略锁定的机器上执行任意代码。以下产品及版本受到影响： PowerShellGet 2.2.5版本。

CVSS 5.3 · Medium EPSS 0.82% · P55

Possible ATT&CK Techniques 2 AI

T1610 · Deploy Container T1218.017
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I. Basic Information for CVE-2020-16886

Vulnerability Information
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Vulnerability Title
PowerShellGet Module WDAC Security Feature Bypass Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
<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>
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
PowerShellGet V2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PowerShellGet V2是个人开发者的一个Powershell的包管理工具。该软件用于查找、安装、更新powershell产品。 PowerShellGet V2 模块存在安全漏洞，该漏洞源于存在安全功能绕过漏洞。攻击者可利用该漏洞可能会绕过 WDAC（Windows Defender 应用程序控制）策略并在策略锁定的机器上执行任意代码。以下产品及版本受到影响： PowerShellGet 2.2.5版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft PowerShellGet 2.2.5 1.0.0 ~ publication cpe:2.3:a:microsoft:powershellget:2.2.5:*:*:*:*:*:*:*

II. Public POCs for CVE-2020-16886

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III. Intelligence Information for CVE-2020-16886

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Vendor Advisories for CVE-2020-16886 (1)

Same Patch Batch · Microsoft · 2020-10-16 · 89 CVEs total

CVE-2020-1080 8.8 HIGH Windows Hyper-V Elevation of Privilege Vulnerability
CVE-2020-16898 8.8 HIGH Windows TCP/IP Remote Code Execution Vulnerability
CVE-2020-16911 8.8 HIGH GDI+ Remote Code Execution Vulnerability
CVE-2020-16891 8.8 HIGH Windows Hyper-V Remote Code Execution Vulnerability
CVE-2020-16946 8.7 HIGH Microsoft Office SharePoint XSS Vulnerability
CVE-2020-16945 8.7 HIGH Microsoft Office SharePoint XSS Vulnerability
CVE-2020-16944 8.7 HIGH Microsoft SharePoint Reflective XSS Vulnerability
CVE-2020-16952 8.6 HIGH Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-16951 8.6 HIGH Microsoft SharePoint Remote Code Execution Vulnerability
CVE-2020-16935 7.8 HIGH Windows COM Server Elevation of Privilege Vulnerability
CVE-2020-16939 7.8 HIGH Group Policy Elevation of Privilege Vulnerability
CVE-2020-16940 7.8 HIGH Windows - User Profile Service Elevation of Privilege Vulnerability
CVE-2020-16967 7.8 HIGH Windows Camera Codec Pack Remote Code Execution Vulnerability
CVE-2020-16936 7.8 HIGH Windows Backup Service Elevation of Privilege Vulnerability
CVE-2020-16930 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16929 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16928 7.8 HIGH Microsoft Office Click-to-Run Elevation of Privilege Vulnerability
CVE-2020-16924 7.8 HIGH Jet Database Engine Remote Code Execution Vulnerability
CVE-2020-16931 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2020-16954 7.8 HIGH Microsoft Office Remote Code Execution Vulnerability

Showing top 20 of 89 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same vendor: Microsoft

V. Comments for CVE-2020-16886

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