Kaseya VSA < 9.5.7a Multiple Vulnerabilities

critical Nessus Plugin ID 151494

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The Kaseya VSA instance installed on the remote host is affected by multiple vulnerabilities

Description

The version of Kaseya VSA installed on the remote host is affected by multiple vulnerabilities as referenced in the vendor advisory:

- Credentials leak and business logic flaw. (CVE-2021-30116)

- Cross-Site Scripting vulnerability (XSS). (CVE-2021-30119)

- 2FA Authentication bypass. (CVE-2021-30120)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update to Kaseya VSA version 9.5.7a or later.

See Also

https://helpdesk.kaseya.com/hc/en-gb/articles/4403785889041

https://www.kaseya.com/potential-attack-on-kaseya-vsa/

Plugin Details

Severity: Critical

ID: 151494

File Name: kaseya_9_5_7_2994.nasl

Version: 1.3

Type: combined

Family: Misc.

Published: 7/12/2021

Updated: 7/13/2021

Dependencies: kaseya_agent_win_installed.nbin, kaseya_vsa_detect.nbin

Risk Information

CVSS Score Source: CVE-2021-30116

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:kaseya:virtual_system_administrator, cpe:/a:kaseya:vsa

Required KB Items: installed_sw/Kaseya Agent, installed_sw/Kaseya Virtual System Administrator

Exploit Ease: No known exploits are available

Patch Publication Date: 7/11/2021

Vulnerability Publication Date: 7/9/2021

Reference Information

CVE: CVE-2021-30116, CVE-2021-30119, CVE-2021-30120