CVE-2021-30120 : What You Need to Know
Learn about CVE-2021-30120, a critical vulnerability in Kaseya VSA <= v9.5.6 enabling attackers to bypass 2FA authentication. Find out the impact, technical details, and mitigation steps.
A detailed overview of CVE-2021-30120, a vulnerability in Kaseya VSA version <= 9.5.6 that allows attackers to bypass the 2FA requirement.
Understanding CVE-2021-30120
This section will cover what CVE-2021-30120 is and the impact it has.
What is CVE-2021-30120?
CVE-2021-30120 is a vulnerability in Kaseya VSA before version 9.5.7 that enables attackers to circumvent the 2FA (two-factor authentication) requirement by manipulating server responses during the login process.
The Impact of CVE-2021-30120
The impact of CVE-2021-30120 is critical, with a CVSS base score of 9.9. Attackers can bypass 2FA, compromising the confidentiality, integrity, and availability of affected systems.
Technical Details of CVE-2021-30120
Exploring the technical aspects of CVE-2021-30120 to understand the vulnerability.
Vulnerability Description
The vulnerability in Kaseya VSA allows attackers to change the server response values related to 2FA, tricking the system into bypassing the authentication process.
Affected Systems and Versions
Kaseya VSA versions prior to 9.5.7 are affected by this vulnerability, putting systems with these versions at risk.
Exploitation Mechanism
By using intercepting proxies like Burp Suite, attackers can modify server responses to disable the 2FA prompt, gaining unauthorized access.
Mitigation and Prevention
Guidelines on how to mitigate the risk posed by CVE-2021-30120.
Immediate Steps to Take
Organizations should upgrade Kaseya VSA to version 9.5.7 or above to remediate this vulnerability and enhance security.
Long-Term Security Practices
Implement robust authentication mechanisms and security protocols to prevent similar bypass attacks in the future.
Patching and Updates
Regularly apply security patches and updates provided by Kaseya to protect against known vulnerabilities.