CVE-2021-24073 : Security Advisory and Response

Skype for Business and Lync are affected by a spoofing vulnerability that allows attackers to impersonate users and perform malicious actions. Learn about the impact, technical details, and mitigation steps for CVE-2021-24073.

Understanding CVE-2021-24073

This section provides insights into the nature of the Skype for Business and Lync spoofing vulnerability.

What is CVE-2021-24073?

The CVE-2021-24073 relates to a spoofing vulnerability in Skype for Business Server 2015 CU 8 and Microsoft Lync Server 2013, enabling unauthorized users to deceive legitimate users.

The Impact of CVE-2021-24073

The vulnerability's impact is rated as MEDIUM, with a CVSS base score of 6.5. Attackers can leverage it to perform various unauthorized actions, posing a risk to affected systems.

Technical Details of CVE-2021-24073

Explore the technical aspects of the Skype for Business and Lync spoofing vulnerability.

Vulnerability Description

The vulnerability allows threat actors to impersonate legitimate users, leading to potential unauthorized access and malicious activities on the affected systems.

Affected Systems and Versions

Skype for Business Server 2015 CU 8 and Microsoft Lync Server 2013 are affected by this spoofing vulnerability, with specific versions and configurations being susceptible.

Exploitation Mechanism

Attackers can exploit this vulnerability by leveraging the spoofing technique to deceive users and gain unwarranted access to the Skype for Business and Lync systems.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-24073 and prevent potential exploitation.

Immediate Steps to Take

Immediately apply official patches and security updates provided by Microsoft to remediate the vulnerability and enhance system security.

Long-Term Security Practices

Implement robust security practices such as user authentication mechanisms, access controls, and monitoring to mitigate spoofing threats and enhance overall cybersecurity.

Patching and Updates

Regularly update and patch Skype for Business Server and Lync Server installations to address known vulnerabilities and maintain system integrity and security.