Security News > 2022 > January > Microsoft: New critical Windows HTTP vulnerability is wormable
Microsoft has patched a critical flaw tagged as wormable and found to impact the latest desktop and server Windows versions, including Windows 11 and Windows Server 2022.
The bug, tracked as CVE-2022-21907 and patched during this month's Patch Tuesday, was discovered in the HTTP Protocol Stack used as a protocol listener for processing HTTP requests by the Windows Internet Information Services web server.
Successful exploitation requires threat actors to send maliciously crafted packets to targeted Windows servers, which use the vulnerable HTTP Protocol Stack for processing packets.
On some Windows versions, the HTTP Trailer Support feature containing the bug is not enabled by default.
In the last two years, Microsoft has patched several other wormable bugs, impacting the Windows DNS Server, the Remote Desktop Services platform, and the Server Message Block v3 protocol.
Redmond also addressed another Windows HTTP RCE vulnerability in May 2021, for which security researchers released demo exploit code that could trigger blue screens of death.
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2022-01-11 | CVE-2022-21907 | Unspecified vulnerability in Microsoft products HTTP Protocol Stack Remote Code Execution Vulnerability | 9.8 |