FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) - Nessus

Critical Plugin ID: 142856

This page contains detailed information about the FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents

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Plugin Overview
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 142856
Name: FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750)
Filename: freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl
Vulnerability Published: 2020-11-06
This Plugin Published: 2020-11-12
Last Modification Time: 2022-01-26
Plugin Version: 1.6
Plugin Type: local
Plugin Family: FreeBSD Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/FreeBSD/pkg_info, Host/FreeBSD/release, Host/local_checks_enabled

Vulnerability Information

Severity: Critical
Vulnerability Published: 2020-11-06
Patch Published: 2020-11-12
CVE [?]: CVE-2020-16846, CVE-2020-17490, CVE-2020-25592
CPE [?]: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:py36-salt, p-cpe:/a:freebsd:freebsd:py37-salt, p-cpe:/a:freebsd:freebsd:py38-salt

Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

SaltStack reports multiple security vulnerabilities in Salt 3002 :

- CVE-2020-16846: Prevent shell injections in netapi ssh client.

- CVE-2020-17490: Prevent creating world readable private keys with the tls execution module.

- CVE-2020-25592: Properly validate eauth credentials and tokens along with their ACLs. Prior to this change eauth was not properly validated when calling Salt ssh via the salt-api. Any value for 'eauth' or 'token' would allow a user to bypass authentication and make calls to Salt ssh.

Solution

Update the affected packages.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, GitHub)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) vulnerability:

Metasploit: exploit/linux/http/saltstack_salt_api_cmd_exec
[SaltStack Salt REST API Arbitrary Command Execution]
GitHub: https://github.com/0ps/pocassistdb
[CVE-2020-16846]
GitHub: https://github.com/EdgeSecurityTeam/Vulnerability
[CVE-2020-16846]
GitHub: https://github.com/SexyBeast233/SecBooks
[CVE-2020-16846]
GitHub: https://github.com/jweny/pocassistdb
[CVE-2020-16846]
GitHub: https://github.com/zomy22/CVE-2020-16846-Saltstack-Salt-API
[CVE-2020-16846]
GitHub: https://github.com/SexyBeast233/SecBooks
[CVE-2020-25592]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS Score Source [?]: CVE-2020-25592
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:H/RL:OF/RC:C

CVSS Base Score:	7.5 (High)
Impact Subscore:	6.4
Exploitability Subscore:	10.0
CVSS Temporal Score:	6.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.5 (Medium)

CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C

CVSS Base Score:	9.8 (Critical)
Impact Subscore:	5.9
Exploitability Subscore:	3.9
CVSS Temporal Score:	9.4 (Critical)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	9.4 (Critical)

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Plugin Source

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2020 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include('compat.inc');

if (description)
{
  script_id(142856);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/26");

  script_cve_id("CVE-2020-16846", "CVE-2020-17490", "CVE-2020-25592");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");

  script_name(english:"FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750)");

  script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing one or more security-related
updates.");
  script_set_attribute(attribute:"description", value:
"SaltStack reports multiple security vulnerabilities in Salt 3002 :

- CVE-2020-16846: Prevent shell injections in netapi ssh client.

- CVE-2020-17490: Prevent creating world readable private keys with
the tls execution module.

- CVE-2020-25592: Properly validate eauth credentials and tokens along
with their ACLs. Prior to this change eauth was not properly validated
when calling Salt ssh via the salt-api. Any value for 'eauth' or
'token' would allow a user to bypass authentication and make calls to
Salt ssh.");
  script_set_attribute(attribute:"see_also", value:"https://docs.saltstack.com/en/latest/topics/releases/3002.1.html");
  # https://vuxml.freebsd.org/freebsd/50259d8b-243e-11eb-8bae-b42e99975750.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?694fdb6a");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-25592");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'SaltStack Salt REST API Arbitrary Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/11/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/11/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/11/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:py36-salt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:py37-salt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:py38-salt");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"FreeBSD Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"py36-salt>=3002<3002.1")) flag++;
if (pkg_test(save_report:TRUE, pkg:"py37-salt>=3002<3002.1")) flag++;
if (pkg_test(save_report:TRUE, pkg:"py38-salt>=3002<3002.1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:pkg_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

The latest version of this script can be found in these locations depending on your platform:

Linux / Unix:
/opt/nessus/lib/nessus/plugins/freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl

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How to Run

Here is how to run the FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

Click to start a New Scan.
Select Advanced Scan.
Navigate to the Plugins tab.
On the top right corner click to Disable All plugins.
On the left side table select FreeBSD Local Security Checks plugin family.
On the right side table select FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) plugin ID 142856.
Specify the target on the Settings tab and click to Save the scan.
Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

143512 - Debian DLA-2480-2 : salt regression update
145319 - Debian DSA-4837-1 : salt - security update
142541 - Fedora 33 : salt (2020-5f08623da1)
142552 - Fedora 31 : salt (2020-9e040bd6dd)
142519 - Fedora 32 : salt (2020-f9fa7892f2)
142850 - GLSA-202011-13 : Salt: Multiple vulnerabilities
142549 - openSUSE Security Update : salt (openSUSE-2020-1833)
142620 - openSUSE Security Update : salt (openSUSE-2020-1868)
151732 - openSUSE 15 Security Update : salt (openSUSE-SU-2021:2106-1)
151062 - openSUSE 15 Security Update : salt (openSUSE-SU-2021:0899-1)
142489 - SaltStack < 3002 Multiple Vulnerabilities
146489 - SaltStack Unauthenticated RCE (direct check)
150580 - SUSE SLES11 Security Update : SUSE Manager Client Tools (SUSE-SU-2020:14538-1)
143874 - SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2020:3155-1)
143632 - SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2020:3243-1)
143761 - SUSE SLES15 Security Update : Salt (SUSE-SU-2020:3244-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file freebsd_pkg_50259d8b243e11eb8baeb42e99975750.nasl version 1.6. For more plugins, visit the Nessus Plugin Library.

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FreeBSD : salt -- multiple vulnerabilities (50259d8b-243e-11eb-8bae-b42e99975750) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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