Vulnerability · Published Sep 11, 2020 · Assigned by microsoft
CVE-2020-0951Windows Defender Application Control Security Feature Bypass Vulnerability
Medium 6.7
In plain English
A medium-severity security flaw in PowerShell 7.0 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 6.6% (higher than 94% of all known vulnerabilities).
Official description
<p>A security feature bypass vulnerability exists in Windows Defender Application Control (WDAC) which could allow an attacker to bypass WDAC enforcement. An attacker who successfully exploited this vulnerability could execute PowerShell commands that would be blocked by WDAC.</p> <p>To exploit the vulnerability, an attacker need administrator access on a local machine where PowerShell is running. The attacker could then connect to a PowerShell session and send commands to execute arbitrary code.</p> <p>The update addresses the vulnerability by correcting how PowerShell commands are validated when WDAC protection is enabled.</p>