CVE-2023-21687 HTTP.sys Information Disclosure Vulnerability
An attacker can exploit an out-of-bounds read in HTTP.sys to disclose sensitive information from memory on affected Windows systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2023-21687?
CVE-2023-21687 is a medium-severity vulnerability in Microsoft Windows 11 21h2, published on 14 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
HTTP.sys Information Disclosure Vulnerability
Which versions are affected by CVE-2023-21687?
It affects 3 products.
Products include Microsoft Windows 11 21h2, Microsoft Windows 11 22h2, Microsoft Windows Server 2022.
How do I fix CVE-2023-21687?
No fix has been published for CVE-2023-21687 yet. Limit exposure of the affected software until one is available.
Is CVE-2023-21687 being exploited?
There is no known exploitation of CVE-2023-21687 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 21h2
- CVE-2024-38080 Microsoft Windows Hyper-V Privilege Escalation
- CVE-2023-23392 HTTP Protocol Stack Remote Code Execution Vulnerability
- CVE-2024-43533 Remote Desktop Client Remote Code Execution Vulnerability
- CVE-2024-38259 Microsoft Management Console Remote Code Execution Vulnerability
- CVE-2023-38146 Windows Themes Remote Code Execution Vulnerability
Sources
Also known as GHSA-mr4r-vfmp-v9q3.