![]() ESET Endpoint Antivirus for Windows and ESET Endpoint Security for Windows from version. ![]() ESET NOD32 Antivirus, ESET Internet Security, ESET Smart Security, and ESET Smart Security Premium from version 10.0.337.1 to 15.0.18.0.The list of products impacted by this vulnerability is quite long, and it includes: While ESET said it only found out about this bug on November 18, a disclosure timeline available in ZDI's advisory reveals that the vulnerability was reported four months earlier, on June 18, 2021. However, ZDI's advisory says attackers are only required to "obtain the ability to execute low-privileged code on the target system," which matches ESET's CVSS severity rating also showing that the bug can be exploited by threat actors with low privileges. The flaw ( CVE-2021-37852) was reported by Michael DePlante of Trend Micro's Zero Day Initiative, and it enables attackers to escalate privileges to NT AUTHORITY\SYSTEM account rights (the highest level of privileges on a Windows system) using the Windows Antimalware Scan Interface (AMSI).ĪMSI was first introduced with Windows 10 Technical Preview in 2015, and it allows apps and services to request memory buffer scans from any major antivirus product installed on the system.Īccording to ESET, this can only be achieved after attackers gain SeImpersonatePrivilege rights, normally assigned to users in the local Administrators group and the device's local Service account to impersonate a client after authentication which should "limit the impact of this vulnerability." Slovak internet security firm ESET released security fixes to address a high severity local privilege escalation vulnerability affecting multiple products on systems running Windows 10 and later or Windows Server 2016 and above. ![]()
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