Ubuntu 16.04 LTS / 18.04 LTS : Salt vulnerabilities (USN-4459-1)

critical Nessus Plugin ID 139659
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The remote Ubuntu host is missing one or more security-related patches.


It was discovered that Salt allows remote attackers to determine which files exist on the server. An attacker could use that to extract sensitive information. (CVE-2018-15750) It was discovered that Salt has a vulnerability that allows an user to bypass authentication. An attacker could use that to extract sensitive information, execute abritrary code or crash the server. (CVE-2018-15751) It was discovered that Salt is vulnerable to command injection. This allows an unauthenticated attacker with network access to the API endpoint to execute arbitrary code on the salt-api host. (CVE-2019-17361) It was discovered that Salt incorrectly validated method calls and sanitized paths. A remote attacker could possibly use this issue to access some methods without authentication. (CVE-2020-11651, CVE-2020-11652).

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected packages.

See Also


Plugin Details

Severity: Critical

ID: 139659

File Name: ubuntu_USN-4459-1.nasl

Version: 1.5

Type: local

Agent: unix

Published: 8/18/2020

Updated: 11/30/2021

Dependencies: ssh_get_info.nasl

Risk Information


Risk Factor: Critical

Score: 9.4


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.2

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

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


Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:salt-api, p-cpe:/a:canonical:ubuntu_linux:salt-common, p-cpe:/a:canonical:ubuntu_linux:salt-master, p-cpe:/a:canonical:ubuntu_linux:salt-minion, cpe:/o:canonical:ubuntu_linux:16.04, cpe:/o:canonical:ubuntu_linux:18.04:-:lts

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 8/13/2020

Vulnerability Publication Date: 10/24/2018

Exploitable With

Metasploit (SaltStack Salt Master/Minion Unauthenticated RCE)

Reference Information

CVE: CVE-2018-15750, CVE-2018-15751, CVE-2019-17361, CVE-2020-11651, CVE-2020-11652

USN: 4459-1