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.
References
Link | Resource |
---|---|
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/DIVD-2021-00011 | Permissions Required Third Party Advisory |
Configurations
History
No history.
Information
Published : 2021-07-09 14:15
Updated : 2024-02-28 18:28
NVD link : CVE-2021-30120
Mitre link : CVE-2021-30120
CVE.ORG link : CVE-2021-30120
JSON object : View
Products Affected
kaseya
- vsa
CWE
CWE-669
Incorrect Resource Transfer Between Spheres