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Microsoft Raises Alert for Underneath-Assault Home windows Flaw

By Ryan Naraine on September 13, 2022

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Microsoft on Tuesday warned that its safety groups have detected zero-day exploitation of a important vulnerability in its flagship Home windows platform.

Redmond included a repair for the newest zero-day within the September batch of Patch Tuesday updates and warned that attackers are already exploiting the flaw to realize SYSTEM privileges on absolutely patched Home windows machines.

Microsoft launched a barebones bulletin acknowledging the bug exists in Home windows Widespread Log File System (CLFS), a subsystem used for information and occasion logging.

From the bulletin:

“An attacker who efficiently exploited this vulnerability might acquire SYSTEM privileges. An attacker should have already got entry and the flexibility to run code on the goal system. This system doesn’t enable for distant code execution in instances the place the attacker doesn’t have already got that potential on the goal system.”

The vulnerability, tracked as CVE-2022-37969, was reported to Microsoft by 4 totally different organizations, suggesting it was utilized in an exploit chain linked to restricted, focused assaults.

Microsoft didn’t launch any technical particulars on the bug or any indicators of compromise (IOCs) to assist defenders hunt for indicators of an infection.  

[ READ: Adobe Patches 63 Security Flaws in Patch Tuesday Bundle ]

The already-exploited CLFS flaw carries a CVSS rating of seven.Eight out of 10.

The Microsoft Patch Tuesday releases cowl not less than 64 new vulnerabilities in a variety of Home windows and OS parts, together with distant code execution flaws in Dynamics CRM, SharePoint,  Workplace and Workplace Elements, Home windows Defender and the Chromium-based Microsoft Edge.

In response to ZDI, The Pattern Micro unit that intently tracks vulnerability warnings, Home windows admins ought to pay pressing consideration to those further points:

CVE-2022-34718 — Home windows TCP/IP Distant Code Execution Vulnerability — This Important-rated bug might enable a distant, unauthenticated attacker to execute code with elevated privileges on affected methods with out consumer interplay. That formally places it into the “wormable” class and earns it a CVSS score of 9.8. Nevertheless, solely methods with IPv6 enabled and IPSec configured are weak. Whereas excellent news for some, should you’re utilizing IPv6 (as many are), you’re in all probability working IPSec as properly. Undoubtedly take a look at and deploy this replace rapidly.

CVE-2022-34724 — Home windows DNS Server Denial of Service Vulnerability — This bug is simply rated Vital since there’s no probability of code execution, however it is best to in all probability deal with it as Important resulting from its potential influence. A distant, unauthenticated attacker might create a denial-of-service (DoS) situation in your DNS server. It’s not clear if the DoS simply kills the DNS service or the entire system. Shutting down DNS is all the time dangerous, however with so many sources within the cloud, a lack of DNS pointing the best way to these sources may very well be catastrophic for a lot of enterprises.

CVE-2022-3075 — Chromium: CVE-2022-3075 Inadequate information validation in Mojo — This patch was launched by the Google Chrome staff again on September 2, so that is extra of an “in case you missed it.” This vulnerability permits code execution on affected Chromium-based browsers (like Edge) and has been detected within the wild. That is the sixth Chrome exploit detected within the wild this yr. The development reveals the near-ubiquitous browser platform has turn into a preferred goal for attackers. Be certain that to replace all your methods primarily based on Chromium.

Along with Microsoft, software program maker Adobe additionally rolled out safety fixes for not less than 63 safety vulnerabilities in a variety of extensively deployed Home windows and macOS software program merchandise

As a part of the scheduled September batch of Patch Tuesday updates, Adobe referred to as consideration to critical-rated bulletins affecting the Adobe Bridge, InDesign, Photoshop, InCopy, Animage and Illustrator software program merchandise. 

Adobe stated it was not conscious of any exploits within the wild for any of the patched vulnerabilities.

Associated: Adobe Patches 63 Safety Flaws in Patch Tuesday Bundle

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