CVE-2023-21573 : Security Advisory and Response

This CVE record pertains to a Cross-site Scripting Vulnerability found in Microsoft Dynamics 365 (on-premises) version 9.1 and version 9.0, impacting systems running these versions. The vulnerability was published by Microsoft on February 14, 2023.

Understanding CVE-2023-21573

This section will delve into the details of CVE-2023-21573 to provide a comprehensive understanding of the vulnerability.

What is CVE-2023-21573?

CVE-2023-21573 refers to a Cross-site Scripting Vulnerability present in Microsoft Dynamics 365 (on-premises) version 9.1 and version 9.0. This type of vulnerability can allow attackers to inject malicious scripts into web pages viewed by users, potentially leading to unauthorized access or other malicious activities.

The Impact of CVE-2023-21573

The impact of this vulnerability is categorized as Spoofing, which can result in attackers masquerading as legitimate users to deceive unsuspecting individuals or gain unauthorized access to sensitive information within the affected systems.

Technical Details of CVE-2023-21573

In this section, we will explore the technical aspects of CVE-2023-21573, including the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The Cross-site Scripting Vulnerability in Microsoft Dynamics 365 (on-premises) allows attackers to inject malicious scripts into web pages, enabling them to execute unauthorized actions on behalf of legitimate users.

Affected Systems and Versions

Microsoft Dynamics 365 (on-premises) version 9.1: Affected versions range from 9.1.0 to less than 9.1.16.20.
Microsoft Dynamics 365 (on-premises) version 9.0: Affected versions range from 9.0.0 to less than 9.0.45.11.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting and injecting malicious scripts into specific input fields or URLs, tricking users into executing these scripts unintentionally and opening the door for various attacks.

Mitigation and Prevention

To address CVE-2023-21573 and enhance the security of affected systems, it is crucial to implement appropriate mitigation strategies and preventive measures.

Immediate Steps to Take

Organizations should apply security patches or updates released by Microsoft promptly to address the vulnerability.
Implement web application firewalls and input validation mechanisms to mitigate the risk of Cross-site Scripting attacks.
Educate users about the importance of being cautious while interacting with unknown or suspicious websites or links.

Long-Term Security Practices

Conduct regular security assessments and penetration testing to identify and remediate potential vulnerabilities proactively.
Stay informed about emerging security threats and best practices for securing web applications to prevent future vulnerabilities.

Patching and Updates

Ensure that all systems running Microsoft Dynamics 365 (on-premises) version 9.1 and version 9.0 are updated with the latest security patches provided by Microsoft to mitigate the Cross-site Scripting Vulnerability effectively.