CVE-2023-21687 : Vulnerability Insights and Analysis

This CVE record identifies the HTTP.sys Information Disclosure Vulnerability, affecting Microsoft products Windows Server 2022, Windows 11 version 21H2, and Windows 11 version 22H2. The vulnerability was published on February 14, 2023, by Microsoft.

Understanding CVE-2023-21687

This section delves into the details of the HTTP.sys Information Disclosure Vulnerability and its impact on the affected Microsoft products.

What is CVE-2023-21687?

The CVE-2023-21687, also known as the HTTP.sys Information Disclosure Vulnerability, allows an attacker to gain unauthorized access to sensitive information due to a flaw in the HTTP.sys component of the affected Microsoft products.

The Impact of CVE-2023-21687

The impact of this vulnerability is classified as "Information Disclosure," potentially leading to the exposure of sensitive data to malicious actors.

Technical Details of CVE-2023-21687

Exploring the technical aspects of the CVE-2023-21687 vulnerability, including the description, affected systems, versions, and exploitation mechanism.

Vulnerability Description

The HTTP.sys Information Disclosure Vulnerability enables attackers to access confidential information by exploiting weaknesses in the affected Microsoft products' HTTP.sys component.

Affected Systems and Versions

Windows Server 2022:
Versions 10.0.0 to less than 10.0.20348.1547 and 10.0.20348.1540 are impacted.
Platforms: x64-based Systems
Windows 11 version 21H2:
Version 10.0.0 to less than 10.0.22621.1574 is affected.
Platforms: x64-based Systems, ARM64-based Systems
Windows 11 version 22H2:
Version 10.0.0 to less than 10.0.22621.1265 is vulnerable.
Platforms: ARM64-based Systems, x64-based Systems

Exploitation Mechanism

The vulnerability can be exploited by malicious actors to disclose sensitive information by sending specifically crafted requests to the HTTP.sys component of the affected systems.

Mitigation and Prevention

Understanding how to mitigate and prevent the CVE-2023-21687 vulnerability in Microsoft products is crucial for maintaining system security.

Immediate Steps to Take

Implement security patches provided by Microsoft promptly.
Monitor network traffic for any suspicious activity.
Apply network segmentation to contain potential attacks.

Long-Term Security Practices

Regularly update and maintain security software to protect against emerging threats.
Conduct security assessments and penetration testing to identify vulnerabilities proactively.
Educate users and employees on cybersecurity best practices to prevent social engineering attacks.

Patching and Updates

Ensure that all affected systems are updated with the latest security patches released by Microsoft to address the HTTP.sys Information Disclosure Vulnerability. Regularly check for updates and apply them promptly to enhance system security.