Remote code execution in Microsoft IIS
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2023-23392 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Windows Server Operating systems & Components / Operating system Windows Operating systems & Components / Operating system Microsoft IIS Server applications / Web servers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one high risk vulnerability.
1) Input validation error
EUVDB-ID: #VU73517
Risk: High
CVSSv3.1: 7.1 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2023-23392
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise the affected system.
The vulnerability exists due to insufficient validation of user-supplied input in the HTTP Protocol Stack (http.sys) when handling HTTP/3 requests. A remote attacker can send a specially crafted HTTP/3 request to the affected server and execute arbitrary code on the system.
Successful exploitation of the vulnerability requires HTTP/3 to be enabled on the server.
Install updates from vendor's website.
Vulnerable software versionsWindows Server: 2022 - 2022 20H2
Windows: 11 - 11 22H2
Microsoft IIS: 10.0
External linkshttp://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2023-23392
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?
No. We are not aware of malware exploiting this vulnerability.
