Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

Application Security

Patch Tuesday: Microsoft Calls Attention to ‘Wormable’ Windows Flaw

Microsoft’s first batch of patches for 2022 is a big one: 97 documented security flaws in the Windows ecosystem, some serious enough to cause remote code execution attacks.

Microsoft’s first batch of patches for 2022 is a big one: 97 documented security flaws in the Windows ecosystem, some serious enough to cause remote code execution attacks.

The January security updates from Redmond cover security defects in a wide range of default Windows OS components, including a critical flaw in the HTTP Protocol Stack (http.sys) that Microsoft describes as “wormable,” and another code execution Exchange Server bug reported by the NSA.

According to Microsoft’s documentation, nine of the 97 bugs are rated “critical,” the company’s highest severity rating.  The majority of the bulletins are rated “important” and Microsoft is warning that at least a half-dozen have already been publicly documented.

The company said it had no information that any of the patched vulnerabilities have been exploited as zero-day in the wild.

[ SEE: Microsoft Exchange Server Zero-Days Under Attack  ]

Security experts are urging Windows admins to pay special attention to CVE-2022-21907, a flaw that allows an unauthenticated attacker to send specially crafted packets to a targeted server utilizing the HTTP Protocol Stack (http.sys) to process packets.

“[This is] wormable. Microsoft recommends prioritizing the patching of affected servers,” the software giant said in an advisory.

The company also slapped the high-impact label on a new Microsoft Exchange bug – CVE-2022-21846 – that was reported by the U.S. government’s National Security Agency (NSA).  Microsoft confirmed the Exchange Server issue could lead to targeted remote code execution attacks.

Advertisement. Scroll to continue reading.

Over the last year, Microsoft has scrambled to respond to a wave of in-the-wild zero-day attacks and the company has regularly credited the NSA with reporting Exchange Server vulnerabilities.

[ READ: Adobe Patches Reader Flaws from Tianfu Cup

The company also patched gaping code execution holes in the Microsoft Office productivity suite, an elevation of privilege issue in Active Directory Domain Services that’s dangerous enough to fetch a critical rating, and an open-source Curl bug first patched and documented in September last year.

According to vulnerability trackers at the Zero Day Initiative, the January patch batch is unusually large with a total of 122 documented CVEs fixed in Windows and the previously updated Edge (Chrome) browser. 

Related: MS Patch Tuesday: NSA Reports New Critical Exchange Flaws

Related: Zero-Days Under Attack: Microsoft Plugs Exchange Server Flaws

Related: Attackers Hitting VMWare Horizon Servers With Log4j Exploits 

Written By

Ryan Naraine is Editor-at-Large at SecurityWeek and host of the popular Security Conversations podcast series. He is a security community engagement expert who has built programs at major global brands, including Intel Corp., Bishop Fox and GReAT. Ryan is a founding-director of the Security Tinkerers non-profit, an advisor to early-stage entrepreneurs, and a regular speaker at security conferences around the world.

Click to comment

Trending

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Learn how the LOtL threat landscape has evolved, why traditional endpoint hardening methods fall short, and how adaptive, user-aware approaches can reduce risk.

Watch Now

Join the summit to explore critical threats to public cloud infrastructure, APIs, and identity systems through discussions, case studies, and insights into emerging technologies like AI and LLMs.

Register

People on the Move

Matthew Cowell has assumed the role of VP of Strategic Alliances at Nozomi Networks. He previously served in the same role at Dragos.

Bret Arsenault is retiring from his full-time role after 35 years at Microsoft.

Social engineering defense platform Doppel has appointed Bobby Ford as Chief Strategy and Experience Officer.

More People On The Move

Expert Insights

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest cybersecurity news, threats, and expert insights. Unsubscribe at any time.