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Incorrect Default Permissions vulnerability in bdservicehost.exe and Vulnerability.Scan.exe (VA-9848)

Publication date: October 28th, 2021

CVE ID:

CVE-2021-3579

CVSS scrore:

7.8 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected vendors:

Bitdefender

Affected products:

Bitdefender Endpoint Security Tools version 7.2.1.65, Bitdefender Total Security

Vulnerability details:

Incorrect Default Permissions vulnerability in the bdservicehost.exe and Vulnerability.Scan.exe components as used in Bitdefender Endpoint Security Tools for Windows, Total Security allows a local attacker to elevate privileges to NT AUTHORITY\SYSTEM.

This issue affects:

Bitdefender Endpoint Security Tools for Windows versions prior to 7.2.1.65.
Bitdefender Total Security versions prior to 7.2.1.65.

Additional details:

An automatic update to Bitdefender Endpoint Security Tools version 7.2.1.65, Bitdefender Total Security version 25.0.26 fixes the issue.

Credit:

Michael DePlante of Trend Micro Zero Day Initiative