Remote code execution in Windows HTTP Protocol Stack



Published: 2022-01-11 | Updated: 2022-11-22
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-21907
CWE-ID CWE-119
Exploitation vector Network
Public exploit Vulnerability #1 is being exploited in the wild.
Vulnerable software
Subscribe 		Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Microsoft IIS
Server applications / Web servers

Vendor Microsoft

Security Bulletin

This security bulletin contains one critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU59392

Risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2022-21907

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

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 - 11 21H2

Windows Server: 2019 - 2022

Microsoft IIS: 10.0

External links

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


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.



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