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

Evasive Panda Attacking Cloud Services To Steal Data Using New Toolkit

The Evasive Panda group deployed a new C# framework named CloudScout to target a Taiwanese…

4 hours ago

Massive Midnight Blizzard Phishing Attack Using Weaponized RDP Files

Researchers warn of ongoing spear-phishing attacks by Russian threat actor Midnight Blizzard targeting individuals in…

5 hours ago

Sophisticated Phishing Attack Targeting Ukraine Military Sectors

The Ukrainian Cyber Emergency Response Team discovered a targeted phishing campaign launched by UAC-0215 against…

5 hours ago

Chinese Hackers Attacking Microsoft Customers With Sophisticated Password Spray Attacks

Researchers have identified a network of compromised devices, CovertNetwork-1658, used by Chinese threat actors to…

5 hours ago

New Windows Zero-Day Vulnerability Let Attackers Steal Credentials From Victim’s Machine

A security researcher discovered a vulnerability in Windows theme files in the previous year, which…

5 hours ago

SYS01 InfoStealer Malware Attacking Meta Business Page To Steal Logins

The ongoing Meta malvertising campaign, active for over a month, employs an evolving strategy to…

5 hours ago