CVE-2021-41350 : What You Need to Know

Microsoft Exchange Server Spoofing Vulnerability was published on October 12, 2021. It affects various versions of Microsoft Exchange Server.

Understanding CVE-2021-41350

This CVE relates to a Spoofing vulnerability in Microsoft Exchange Server.

What is CVE-2021-41350?

The CVE-2021-41350 is a Spoofing vulnerability found in Microsoft Exchange Server that could allow an attacker to spoof a legitimate user's identity.

The Impact of CVE-2021-41350

The vulnerability could lead to unauthorized actions performed under a spoofed identity, potentially compromising data integrity and user privacy.

Technical Details of CVE-2021-41350

This section covers the technical aspects of the CVE.

Vulnerability Description

The vulnerability allows an attacker to perform spoofing attacks on Microsoft Exchange Server, posing as legitimate users.

Affected Systems and Versions

Microsoft Exchange Server 2016 Cumulative Update 21 (Version 15.01.0 to less than 15.01.2308.015)
Microsoft Exchange Server 2019 Cumulative Update 10 (Version 15.02.0 to less than 15.02.0922.014)
Microsoft Exchange Server 2019 Cumulative Update 11 (Version 15.02.0 to less than 15.02.0986.009)
Microsoft Exchange Server 2016 Cumulative Update 22 (Version 15.0.0 to less than 15.01.2375.012)

Exploitation Mechanism

The vulnerability can be exploited by an attacker to impersonate legitimate users, potentially leading to identity fraud and unauthorized actions.

Mitigation and Prevention

Protect systems and data from CVE-2021-41350.

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Monitor for any unauthorized access or activities on the Exchange Server.

Long-Term Security Practices

Implement multi-factor authentication for added security.
Conduct regular security audits and assessments to detect vulnerabilities proactively.
Educate users on identifying and reporting suspicious activities.

Patching and Updates

Ensure that Microsoft Exchange Server 2016 and 2019 installations are updated with the latest cumulative updates to mitigate the spoofing vulnerability.