Vulnerability in Windows Defender Application Control Let Hackers Bypass It’s Security Feature

Microsoft released a new security update for the vulnerability that affected Windows Defender Application Control (WDAC) that allows a local attacker to bypass the WDAC security feature.

Windows Defender Application Control restricts which applications users are allowed to run and the code that runs in the system core.

WDAC also block unsigned scripts and MSIs, and Windows PowerShell runs in Constrained Language Mode.

According to Microsoft advisory, An attacker who successfully exploited this vulnerability could circumvent PowerShell Core Constrained Language Mode on the machine.

In order to exploit this vulnerability, the Attacker first gains administrator access to the local machine where PowerShell is running in Constrained Language mode which leads an attacker leverage script debugging to abuse signed modules and access resources in an unintended way.

The vulnerability affects PowerShell Core prior to the following versions:

PowerShell Core VersionFixed in
6.16.1.5
6.26.2.2

If you want to check whether the system is vulnerable follow the below instruction that suggested here,

  1. Run pwsh -v, then, check the version in the table in Affected Software to see if your version of PowerShell Core is affected.
  2. If you are running a version of PowerShell Core where the executable is not pwsh or pwsh.exe, then you are affected. This only existed for a preview version of 6.0.

If you find that your system running with an affected version, you can download the latest version here at PowerShell Core Releases page.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity updates also you can take the Best Cybersecurity course online to keep yourself updated.

Also Read

New Adwind RAT Attack Linux, Windows and Mac via DDE Code Injection Technique by Evading Antivirus Software

Hackers Spreading New Malware with Powerful Obfuscation Technique to Bypass Antivirus Software

Balaji

BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Recent Posts

Threat Actors Exploit Google Docs And Weebly Services For Malware Attacks

Phishing attackers used Google Docs to deliver malicious links, bypassing security measures and redirecting victims…

3 hours ago

Python NodeStealer: Targeting Facebook Business Accounts to Harvest Login Credentials

The Python-based NodeStealer, a sophisticated info-stealer, has evolved to target new information and employ advanced…

3 hours ago

XSS Vulnerability in Bing.com Let Attackers Send Crafted Malicious Requests

A significant XSS vulnerability was recently uncovered in Microsoft’s Bing.com, potentially allowing attackers to execute…

6 hours ago

Meta Removed 2 Million Account Linked to Malicious Activities

 Meta has announced the removal of over 2 million accounts connected to malicious activities, including…

9 hours ago

Veritas Enterprise Vault Vulnerabilities Lets Attackers Execute Arbitrary Code Remotely

Critical security vulnerability has been identified in Veritas Enterprise Vault, a widely-used archiving and content…

10 hours ago

7-Zip RCE Vulnerability Let Attackers Execute Remote Code

A critical security vulnerability has been disclosed in the popular file archiving tool 7-Zip, allowing…

10 hours ago