CVE-2021-36946 Explained : Impact and Mitigation

Microsoft Dynamics Business Central Cross-site Scripting Vulnerability was published on August 10, 2021, by Microsoft. It impacts Microsoft Dynamics NAV 2017, Microsoft Dynamics NAV 2018, Dynamics 365 Business Central Spring 2019 Update, Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.9, and Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.15.

Understanding CVE-2021-36946

This CVE identifies a Cross-site Scripting Vulnerability within Microsoft Dynamics Business Central.

What is CVE-2021-36946?

Microsoft Dynamics Business Central is prone to a cross-site scripting weakness.

The Impact of CVE-2021-36946

The vulnerability allows an attacker to execute scripts in a victim's web browser which can result in various malicious activities including session hijacking, sensitive data theft, and phishing attacks.

Technical Details of CVE-2021-36946

In the realm of technicalities...

Vulnerability Description

The vulnerability has a base severity of MEDIUM with a CVSS base score of 5.4. It allows for exploitation via a crafted request to execute arbitrary scripts in a user's browser.

Affected Systems and Versions

The affected systems include Microsoft Dynamics NAV 2017, Microsoft Dynamics NAV 2018, Dynamics 365 Business Central Spring 2019 Update, Microsoft Dynamics 365 Business Central 2020 Release Wave 2 - Update 17.9, and Microsoft Dynamics 365 Business Central 2020 Release Wave 1 - Update 16.15.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a specially crafted request to the target system leading to script execution in the context of the user's session.

Mitigation and Prevention

Mitigating actions are necessary to prevent exploitation...

Immediate Steps to Take

Users are advised to install the latest security updates provided by Microsoft to address this vulnerability. Additionally, users should be cautious while interacting with untrusted websites or links.

Long-Term Security Practices

Implementing strong web application security practices, input validation mechanisms, and regular security audits can help in preventing such vulnerabilities.

Patching and Updates

Microsoft has released security updates to fix this vulnerability. It is crucial for users to apply these patches promptly to protect their systems.