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Microsoft Patch Tuesday: 97 Home windows Vulns, 1 Exploited Zero-Day

By Ryan Naraine on January 10, 2023

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Microsoft’s safety patching machine hummed into overdrive Tuesday with the discharge of fixes for at the least 97 documented software program vulnerabilities, together with a zero-day that’s already been exploited to flee the browser sandbox.

The zero-day, flagged by researchers at anti-malware firm Avast, was exploited in reside assaults to raise privileges and escape a browser’s sandbox mitigation.

As has develop into customary, Microsoft is stingy with particulars on the vulnerability or the assaults.  An advisory from Redmond marks the CVE-2023-21674 flaw within the “Exploitation Detected” class however the firm didn’t launch IOCs or any knowledge to assist defenders hunt for indicators of compromise.

“An attacker who efficiently exploited this vulnerability may achieve SYSTEM privileges,” Microsoft mentioned, noting that the bug exists within the Home windows Superior Native Process Name (ALPC) part.

Microsoft additionally known as consideration to CVE-2023-21549, a privilege escalation subject within the Home windows SMB Witness Service, warning that technical particulars on the vulnerability are publicly out there. 

To take advantage of this vulnerability, an attacker may execute a specifically crafted malicious script which executes an RPC name to an RPC host. This might lead to elevation of privilege on the server.

An attacker who efficiently exploited this vulnerability may execute RPC capabilities which might be restricted to privileged accounts solely, Microsoft added.

The January batch of patches fixes code execution, denial-of-service and elevation of privilege flaws in a variety of WIndows OS and system elements.

Microsoft documented main safety issues in its flagship Workplace productiveness suite, .Web Core and Visible Studio Code, Microsoft Trade Server, Home windows Print Spooler, Home windows Defender and Home windows BitLocker.

The Microsoft patches come on the identical day software program maker Adobe rolled out fixes for at the least 29 safety vulnerabilities in a variety of enterprise-facing merchandise. Probably the most outstanding replace, for the extensively deployed Adobe Acrobat and Reader software program, fixes critical-severity flaws that expose Home windows and macOS customers to code execution assaults. 

Video messaging big Zoom additionally launched patches for a number of safety vulnerabilities that expose each Home windows and macOS customers to malicious hacker assaults. The vulnerabilities, within the enterprise-facing Zoom Rooms product, might be exploited in privilege escalation assaults on each Home windows and macOS platforms.

Associated: Adobe Plugs Safety Holes in Acrobat, Reader Software program

Associated: Zoom Patches Excessive Threat Flaws on Home windows, MacOS Platforms

Associated: ICS Patch Tuesday Debuts With Warnings From Siemens, Schneider

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