Tuesday, July 16, 2024

Vulnerability in McAfee Antivirus Software Let Hackers Execute an Arbitrary Code & Escalates System Privilege

McAfee patched a Privilege Escalation vulnerability in Microsoft Windows client versions of all McAfee Antivirus versions that allow administrators to execute arbitrary code and escalate to SYSTEM privileges.

The system account is the internal account used by the Windows operating system to manage the services that run under Windows.

The vulnerability affects Microsoft Windows client in McAfee Total Protection, McAfee Anti-Virus Plus, and McAfee Internet Security, 16.0.R22 and earlier.

Escalation Vulnerability Discovery

The vulnerability was discovered by SafeBreach Labs in all the editions of McAfee Antivirus software. To exploit this vulnerability the attacker needs to be a system administrator.

“This vulnerability could be used by an attacker to bypass McAfee’s Self-Defense mechanism, evade defense and achieve persistence by loading multiple services that run as NT AUTHORITY\SYSTEM.”

McAfee Antivirus
Trying to load from System32\Wbem

With the Anti-virus software, multiple parts run as a Windows service executed by “NT AUTHORITY\SYSTEM,” which has SYSTEM permission.

Researchers found that McAfee Antivirus software which runs as a signed process and as NT AUTHORITY\SYSTEM tries to load the wbemcomn.dll file from location (c:\Windows\System32\wbem\wbemcomn.dll) whereas the file present under System32 and not with System32\Wbem folder.

This allows researchers to load an unsigned arbitrary DLL to load in the process and to bypass the self-defense mechanism of the Antivirus software. “This is mainly because the folders of the McAfee software are protected by a mini-filter filesystem driver, which restricts writing operations even by an Administrator.”

The vulnerability gives attackers an ability to load and execute malicious payloads using multiple signed services in a persistent way within the context of McAfee’s signed processes.

The vulnerability can be tracked as CVE-2019-3648 and it was reported to McAfee on Aug 5th, 2019, it has been patched now and McAfee urges users to update with 16.0.R22 Refresh 1 version that fixes the privilege escalation vulnerability.

This is not the first time like McAfee Hadar reported privilege escalation vulnerability in other security vendors such as Avast Antivirus, AVG Antivirus, Trend Micro and Check Point Endpoint security.

You can follow us on LinkedinTwitterFacebook for daily Cybersecurity and hacking news updates


Latest articles

New Poco RAT Weaponizing 7zip Files Using Google Drive

The hackers weaponize 7zip files to pass through security measures and deliver malware effectively.These...

New ShadowRoot Ransomware Attacking Business Via Weaponized PDF’s

X-Labs identified basic ransomware targeting Turkish businesses, delivered via PDF attachments in suspicious emails...

Hacktivist Groups Preparing for DDoS Attacks Targeting Paris Olympics

Cyble Research & Intelligence Labs (CRIL) researchers have identified a cyber threat targeting the...

Critical Cellopoint Secure Email Gateway Flaw Let Attackers Execute Arbitrary Code

A critical vulnerability has been discovered in the Cellopoint Secure Email Gateway, identified as...

Singapore Banks to Phase out OTPs for Bank Account Logins Within 3 Months

The Monetary Authority of Singapore (MAS) and The Association of Banks in Singapore (ABS)...

GuardZoo Android Malware Attacking military personnel via WhatsApp To Steal Sensitive Data

A Houthi-aligned group has been deploying Android surveillanceware called GuardZoo since October 2019 to...

ViperSoftX Weaponizing AutoIt & CLR For Stealthy PowerShell Execution

ViperSoftX is an advanced malware that has become more complicated since its recognition in...
BALAJI is an Ex-Security Researcher (Threat Research Labs) at Comodo Cybersecurity. Editor-in-Chief & Co-Founder - Cyber Security News & GBHackers On Security.

Free Webinar

Low Rate DDoS Attack

9 of 10 sites on the AppTrana network have faced a DDoS attack in the last 30 days.
Some DDoS attacks could readily be blocked by rate-limiting, IP reputation checks and other basic mitigation methods.
More than 50% of the DDoS attacks are employing botnets to send slow DDoS attacks where millions of IPs are being employed to send one or two requests per minute..
Key takeaways include:

  • The mechanics of a low-DDoS attack
  • Fundamentals of behavioural AI and rate-limiting
  • Surgical mitigation actions to minimize false positives
  • Role of managed services in DDoS monitoring

Related Articles