#VU59392 Buffer overflow in Microsoft products - CVE-2022-21907

Vulnerability identifier: #VU59392

Vulnerability risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2022-21907

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system
Microsoft IIS
Server applications / Web servers

Vendor: Microsoft

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the HTTP Trailer Support feature in HTTP Protocol Stack (http.sys). A remote attacker can send a specially crafted HTTP request to the web server, trigger a buffer overflow and execute arbitrary code on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 10 20H2 10.0.19042.572, 10 21H1 10.0.19043.985, 10 1809 10.0.17763.1, 11 21H2 10.0.22000.194

Windows Server: 2019 10.0.17763.1 - 2019 20H2, 2022 10.0.20348.202

Microsoft IIS: 10.0

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External links
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2022-21907

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.