SaltStack Unauthenticated RCE (direct check)

critical Nessus Plugin ID 146489

Synopsis

The version of SaltStack running on the remote server is affected by multiple vulnerabilities.

Description

An improper authentication vulnerability affecting users running the Salt API exists due to a validation issue when calling Salt SSH via the salt-api, An unauthenticated, remote attacker could bypass authentication by supplying any value for eauth or token to gain the ability to run commands using Salt SSH.

Solution

Upgrade to SaltStack version referenced in the vendor security advisory.

See Also

http://www.nessus.org/u?f2a5e02b

http://www.nessus.org/u?c2f8b1d8

https://twitter.com/chybeta/status/1325836157653934080

Plugin Details

Severity: Critical

ID: 146489

File Name: saltstack_cve-2020-16846.nbin

Version: 1.22

Type: remote

Family: Web Servers

Published: 2/15/2021

Updated: 11/30/2022

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

CVSS Score Source: CVE-2020-25592

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.4

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

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

Vulnerability Information

CPE: cpe:/a:saltstack:salt

Required KB Items: installed_sw/SaltStack Salt Master

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 11/3/2020

Vulnerability Publication Date: 11/3/2020

CISA Known Exploited Dates: 5/3/2022

Exploitable With

Metasploit (SaltStack Salt REST API Arbitrary Command Execution)

Reference Information

CVE: CVE-2020-16846, CVE-2020-25592