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Homeland Security issues rare emergency alert on ‘critical’ Windows bug – TechCrunch

Homeland Security’s cybersecurity advisory unit issued a rare emergency alert to government departments after the recent disclosure of a “critical” security vulnerability in server versions of Microsoft The Windows.

The Cybersecurity and Infrastructure Security Agency, better known as CISA, issued an alert late friday requiring all federal departments and agencies to “immediately” fix all Windows servers vulnerable to the so-called Zerologon attack by Monday, citing an “unacceptable risk” to government networks.

This is the third emergency alert issued by CISA this year.

the Zerologon vulnerability, rated at a maximum of 10.0 in terms of severity, could allow an attacker to take control of all or part of the computers in a vulnerable network, including domain controllers, the servers that manage the security of a network . The bug has been aptly called “Zerologon” because an attacker does not need to steal or use network passwords to gain access to domain controllers, but only gain a foothold in the network, for example by exploiting a vulnerable device connected to the network.

With full access to a network, an attacker could deploy malware, ransomware, or steal sensitive internal files.

Security company Secura, which discovered the bug, said it took “about three seconds in practice” to exploit the vulnerability.

Microsoft released an initial patch in August to prevent exploitation. But given the complexity of the bug, Microsoft said it should roll out a second patch early next year to completely eradicate the problem.

But the race is on to fix the systems after researchers reportedly released proof of concept code, potentially allowing attackers to use the code to launch attacks. CISA said on Friday that it “assumes that active exploitation of this vulnerability occurs in the wild.”

Although the CISA alert only applies to federal government networks, the agency said it “strongly” urges businesses and consumers to patch their systems as soon as possible, if not already.

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