![]() There are actually a couple of Windows Server releases as you can see on the currently blank (patches) that are listed on the official CVE page from Microsoft: The current list of affected operating systems include the following that have been identified: Running iCACLS command to check for the SeriousSAM and HiveNightmare vulnerabilityĮven Microsoft’s new Windows 11 client operating system is affected by this zero-day bug. With the SeriousSAM and HiveNightmare zero-day, underprivileged users have permissions to these sensitive files, meaning an attacker can read senstive credentials and other information if they know what they are doing. Specifically, the files found in the C:\Windows\System32\config foldercontain files such as SYSTEM, SECURITY, SAM, DEFAULT, and SOFTWARE. However, with SeriousSAM and HiveNightmare, that is exactly what they have been discovered to be able to do.Ī set of overly lax security permissions have been found to exist on multiple system files. Typically when underprivileged users in the common Users group on a machine try to do things that only an administrator should be able to do, like read sensitive registry settings, they can’t. Let’s take a look at Check Windows 10 for SeriousSAM and HiveNightmare Vulnerability Fix workaround and see what this entails from an admin perspective and the fallout of doing so. We are on the heels of the PrinterNightmare debacle, currently with no patch, and we now have a new zero-day bug – “SeriousSAM or HiveNightmare.” Announced in the past few hours, SeriousSAM or HiveNightmare allows someone in the underprivileged USERS group to do things they shouldn’t. Including the fun we have had as system administrators is the seemingly record number of zero-day bugs that have been found in Microsoft Windows. Well, it has been quite a year so far in many ways. ***Update*** – Check out the link to my PowerShell remediation script below.
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