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

critical Nessus Plugin ID 139659

Synopsis

The remote Ubuntu host is missing one or more security-related patches.

Description

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.

Solution

Update the affected packages.

See Also

https://usn.ubuntu.com/4459-1/

Plugin Details

Severity: Critical

ID: 139659

File Name: ubuntu_USN-4459-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 8/18/2020

Updated: 1/24/2022

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

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-2020-11651

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: 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

CISA Known Exploited Dates: 5/3/2022

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