MSRC-CVE-2023-21687 — HTTP.sys Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is the contents of Kernel memory. An attacker could read the contents of Kernel memory from a user mode process.

Security updates
10.0.20348.1547 — https://support.microsoft.com/help/5022842
10.0.20348.1540 — https://support.microsoft.com/help/5022921
10.0.22621.1574 — https://support.microsoft.com/help/5022836
10.0.22621.1265 — https://support.microsoft.com/help/5022845

Vulnerabilities 1

Medium 5.5

CVE-2023-21687

HTTP.sys Information Disclosure Vulnerability

HTTP.sys Information Disclosure Vulnerability

Microsoft Windows Server 2022 Windows 11 version 22H2 Windows 11 version 21H2 Windows

Feb 14, 2023

Revision history

2023-02-14 #1
Information published.

References

CVE-2023-21687 HTTP.sys Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21687
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss