Researchers warn a software patch Microsoft issued this week did not fully correct a flaw in all supported versions of the Windows operating system that allows hackers to commandeer infected networks.
The PrintNightmare vulnerability is rooted in bugs in the Windows print spooler, which supports printing functionality in local networks, and which attackers can exploit remotely when print capabilities are exposed online.
Hackers also can use the flaw to escalate system privileges once they have infiltrated a vulnerable network via another bug, hijacking the domain controller.
Mimikatz developer Benjamin Delpy tweeted that exploits could circumvent Microsoft's out-of-band update, which fails to fix vulnerable systems that employ certain settings for the point and print feature.
From Ars Technica
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