Patch Tuesday, May 2024 Edition – Krebs on Security


Microsoft as we speak launched updates to repair greater than 60 safety holes in Windows computer systems and supported software program, together with two “zero-day” vulnerabilities in Windows which can be already being exploited in energetic assaults. There are additionally vital safety patches accessible for macOS and Adobe customers, and for the Chrome Web browser, which simply patched its personal zero-day flaw.

First, the zero-days. CVE-2024-30051 is an “elevation of privilege” bug in a core Windows library. Satnam Narang at Tenable mentioned this flaw is getting used as a part of post-compromise exercise to raise privileges as a neighborhood attacker.

“CVE-2024-30051 is used to gain initial access into a target environment and requires the use of social engineering tactics via email, social media or instant messaging to convince a target to open a specially crafted document file,” Narang mentioned. “Once exploited, the attacker can bypass OLE mitigations in Microsoft 365 and Microsoft Office, which are security features designed to protect end users from malicious files.”

Kaspersky Lab, one in every of two corporations credited with reporting exploitation of CVE-2024-30051 to Microsoft, has printed an interesting writeup on how they found the exploit in a file shared with

Kaspersky mentioned it has since seen the exploit used along with QakBot and different malware. Emerging in 2007 as a banking trojan, QakBot (a.okay.a. Qbot and Pinkslipbot) has morphed into a sophisticated malware pressure now utilized by a number of cybercriminal teams to organize newly compromised networks for ransomware infestations.

CVE-2024-30040 is a safety function bypass in MSHTML, a element that’s deeply tied to the default Web browser on Windows methods. Microsoft’s advisory on this flaw is pretty sparse, however Kevin Breen from Immersive Labs mentioned this vulnerability additionally impacts Office 365 and Microsoft Office functions.

“Very little information is provided and the short description is painfully obtuse,” Breen mentioned of Microsoft’s advisory on CVE-2024-30040.

The solely vulnerability mounted this month that earned Microsoft’s most-dire “critical” ranking is CVE-2024-30044, a flaw in Sharepoint that Microsoft mentioned is more likely to be exploited. Tenable’s Narang notes that exploitation of this bug requires an attacker to be authenticated to a weak SharePoint Server with Site Owner permissions (or greater) first and to take extra steps with a purpose to exploit this flaw, which makes this flaw much less more likely to be extensively exploited as most attackers comply with the trail of least resistance.

Five days in the past, Google launched a safety replace for Chrome that fixes a zero-day within the standard browser. Chrome often auto-downloads any accessible updates, but it surely nonetheless could require a whole restart of the browser to put in them. If you employ Chrome and see a “Relaunch to update” message within the higher proper nook of the browser, it’s time to restart.

Apple has simply shipped macOS Sonoma 14.5 replace, which incorporates practically two dozen safety patches. To guarantee your Mac is up-to-date, go to System Settings, General tab, then Software Update and comply with any prompts.

Finally, Adobe has crucial safety patches accessible for a variety of merchandise, together with Acrobat, Reader, Illustrator, Adobe Substance 3D Painter, Adobe Aero, Adobe Animate and Adobe Framemaker.

Regardless of whether or not you employ a Mac or Windows system (or one thing else), it’s at all times a good suggestion to backup your knowledge and or system earlier than making use of any safety updates. For a better take a look at the person fixes launched by Microsoft as we speak, take a look at the entire checklist over on the SANS Internet Storm Center. Anyone in command of sustaining Windows methods in an enterprise surroundings ought to keep watch over, which often has the inside track on any wonky Windows patches.

Update, May 15, 8:28 a.m.: Corrected misattribution of CVE-2024-30051.


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