CVE-2021-30120

CRITICAL

9.9

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.

CVE Details

CVSS v3.1 Score9.9

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published7/9/2021

Last Modified11/21/2024

Sourcenvd

Honeypot Sightings0

Affected Products

kaseya:vsa

Weaknesses (CWE)

CWE-669

References

https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/(cve@mitre.org)

https://csrit.divd.nl/CVE-2021-30120(cve@mitre.org)

https://csrit.divd.nl/DIVD-2021-00011(cve@mitre.org)

https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/(af854a3a-2127-422b-91ae-364da2661108)

https://csrit.divd.nl/CVE-2021-30120(af854a3a-2127-422b-91ae-364da2661108)

https://csrit.divd.nl/DIVD-2021-00011(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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