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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-30120 Detail

Description

Kaseya VSA before 9.5.7 allows attackers to bypass the 2FA requirement. The need to use 2FA for authentication in enforce client-side instead of server-side and can be bypassed using a local proxy. Thus rendering 2FA useless. Detailed description --- During the login process, after the user authenticates with username and password, the server sends a response to the client with the booleans MFARequired and MFAEnroled. If the attacker has obtained a password of a user and used an intercepting proxy (e.g. Burp Suite) to change the value of MFARequered from True to False, there is no prompt for the second factor, but the user is still logged in.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ Patch  Third Party Advisory 
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/ Patch  Third Party Advisory 
https://csrit.divd.nl/CVE-2021-30120 Permissions Required  Third Party Advisory 
https://csrit.divd.nl/CVE-2021-30120 Permissions Required  Third Party Advisory 
https://csrit.divd.nl/DIVD-2021-00011 Permissions Required  Third Party Advisory 
https://csrit.divd.nl/DIVD-2021-00011 Permissions Required  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-669 Incorrect Resource Transfer Between Spheres cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

8 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-30120
NVD Published Date:
07/09/2021
NVD Last Modified:
11/21/2024
Source:
MITRE