CVE-2021-30116

Kaseya VSA before 9.5.7 allows credential disclosure, as exploited in the wild in July 2021. By default Kaseya VSA on premise offers a download page where the clients for the installation can be downloaded. The default URL for this page is https://x.x.x.x/dl.asp When an attacker download a client for Windows and installs it, the file KaseyaD.ini is generated (C:Program Files (x86)KaseyaXXXXXXXXXXKaseyaD.ini) which contains an Agent_Guid and AgentPassword This Agent_Guid and AgentPassword can be used to log in on dl.asp (https://x.x.x.x/dl.asp?un=840997037507813&pw=113cc622839a4077a84837485ced6b93e440bf66d44057713cb2f95e503a06d9) This request authenticates the client and returns a sessionId cookie that can be used in subsequent attacks to bypass authentication. Security issues discovered --- * Unauthenticated download page leaks credentials * Credentials of agent software can be used to obtain a sessionId (cookie) that can be used for services not intended for use by agents * dl.asp accepts credentials via a GET request * Access to KaseyaD.ini gives an attacker access to sufficient information to penetrate the Kaseya installation and its clients. Impact --- Via the page /dl.asp enough information can be obtained to give an attacker a sessionId that can be used to execute further (semi-authenticated) attacks against the system.

Link	Resource
https://csirt.divd.nl/2021/07/04/Kaseya-Case-Update-2/	Third Party Advisory
https://csirt.divd.nl/2021/07/07/Kaseya-Limited-Disclosure/	Third Party Advisory
https://helpdesk.kaseya.com/hc/en-gb/articles/4403440684689-Important-Notice-July-2nd-2021	Vendor Advisory

Configuration 1

cpe:2.3:a:kaseya:vsa_agent:*:*:*:*:*:*:*:* cpe:2.3:a:kaseya:vsa_server:*:*:*:*:*:*:*:*

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Published : 2021-07-09 02:15

Updated : 2022-07-12 05:42

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NVD link : CVE-2021-30116

Mitre link : CVE-2021-30116

No products.

NVD-CWE-noinfo