CVE-2019-14510 Information

Description

An issue was discovered in Kaseya VSA RMM through 9.5.0.22. When using the default configuration the LAN Cache feature creates a local account FSAdminxxxxxxxxx (e.g. FSAdmin123456789) on the server that hosts the LAN Cache and all clients that are assigned to a LAN Cache. This account is placed into the local Administrators group of all clients assigned to the LAN Cache. When the assigned client is a Domain Controller the FSAdminxxxxxxxxx account is created as a domain account and automatically added as a member of the domain BUILTIN\Administrators group. Using the well known Pass-the-Hash techniques an attacker can use the same FSAdminxxxxxxxxx hash from any LAN Cache client and pass this to a Domain Controller providing administrative rights to the attacker on any Domain Controller. (Local account Pass-the-Hash mitigations do not protect domain accounts.)

CVSS Vector

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

Reference

http://community.kaseya.com/xsp/f/355.aspx http://community.kaseya.com/xsp/f/355/t/24675.aspx https://lockstepgroup.com/blog/abusing-the-kaseya-lan-cache-fsadmin/ https://lockstepgroup.com/blog/cve-2019-14510-abusing-the-kaseya-lan-cache-fsadmin-red-team-edition/ https://www.kaseya.com/products/vsa/

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.7