Vulnerability · Published Oct 16, 2020 · Assigned by microsoft
CVE-2020-16886PowerShellGet Module WDAC Security Feature Bypass Vulnerability
Medium 5.3
In plain English
A medium-severity security flaw in PowerShellGet 2.2.5 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.8% (higher than 57% of all known vulnerabilities).
Official 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>
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | PowerShellGet 2.2.5 | 1.0.0 – before publication |