SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities - Nessus

Critical   Plugin ID: 136402

This page contains detailed information about the SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities 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

ID: 136402
Name: SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities
Filename: saltstack_3000_2_multiple_vulnerabilities.nasl
Vulnerability Published: 2020-03-24
This Plugin Published: 2020-05-07
Last Modification Time: 2022-01-24
Plugin Version: 1.9
Plugin Type: local
Plugin Family: Misc.
Dependencies: saltstack_salt_linux_installed.nbin
Required KB Items [?]: installed_sw/SaltStack Salt Master

Vulnerability Information

Severity: Critical
Vulnerability Published: 2020-03-24
Patch Published: 2020-04-30
CVE [?]: CVE-2020-11651, CVE-2020-11652
CPE [?]: cpe:/a:saltstack:salt

Synopsis

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

Description

According to its self-reported version number, the instance of SaltStack hosted on the remote server is prior to 2019.2.4, 3000.x prior to 3000.2. It is, therefore, affected by multiple vulnerabilities:

- An authentication bypass vulnerabilities exists in the ClearFuncs class due to improper validation of method calls. An unauthenticated, remote attacker can exploit this by accessing exposed methods to trigger minions to run arbitrary commands as root, or to retrieve the root key to authenticate commands from the local root user on the master server. (CVE-2020-11651)

- A directory traversal vulnerabilities exists in the ClearFuncs class due to improper path sanitization. An authenticated, remote attacker can exploit this by accessing the exposed get_token() method which allows the insertion of double periods in the filename parameter to read files outside of the intended directory. The only restriction is that the file has to be deserializable by salt.payload.Serial.loads(). (CVE-2020-11652)

Solution

Upgrade to SaltStack version 2019.2.4, 3000.2 or later.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities vulnerability:

  1. Metasploit: exploit/linux/misc/saltstack_salt_unauth_rce
    [SaltStack Salt Master/Minion Unauthenticated RCE]
  2. Metasploit: auxiliary/gather/saltstack_salt_root_key
    [SaltStack Salt Master Server Root Key Disclosure]
  3. Exploit-DB: exploits/multiple/remote/48421.txt
    [EDB-48421: Saltstack 3000.1 - Remote Code Execution]
  4. GitHub: https://github.com/FDlucifer/firece-fish
    [CVE-2020-11651]
  5. GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
    [CVE-2020-11651]
  6. GitHub: https://github.com/SexyBeast233/SecBooks
    [CVE-2020-11651]
  7. GitHub: https://github.com/TesterCC/exp_poc_library
    [CVE-2020-11651]
  8. GitHub: https://github.com/appcheck-ng/salt-rce-scanner-CVE-2020-11651-CVE-2020-11652
    [CVE-2020-11651: Scanning tool to test for SaltStack vulnerabilities CVE-2020-11651 & CVE-2020-11652. ...]
  9. GitHub: https://github.com/dozernz/cve-2020-11651
    [CVE-2020-11651]
  10. GitHub: https://github.com/dwoz/salt-rekey
    [CVE-2020-11651]
  11. GitHub: https://github.com/fanjq99/CVE-2020-11652
    [CVE-2020-11651]
  12. GitHub: https://github.com/fofapro/vulfocus
    [CVE-2020-11651]
  13. GitHub: https://github.com/gobysec/Goby
    [CVE-2020-11651]
  14. GitHub: https://github.com/kasini3000/kasini3000
    [CVE-2020-11651]
  15. GitHub: https://github.com/lovechinacoco/https-github.com-mai-lang-chai-Middleware-Vulnerability-detection
    [CVE-2020-11651]
  16. GitHub: https://github.com/lovelyjuice/cve-2020-11651-exp-plus
    [CVE-2020-11651]
  17. GitHub: https://github.com/merlinxcy/ToolBox
    [CVE-2020-11651]
  18. GitHub: https://github.com/puckiestyle/cve-2020-11651
    [CVE-2020-11651]
  19. GitHub: https://github.com/rapyuta-robotics/clean-script
    [CVE-2020-11651]
  20. GitHub: https://github.com/tdtc7/qps
    [CVE-2020-11651]
  21. GitHub: https://github.com/whoadmin/pocs
    [CVE-2020-11651]
  22. GitHub: https://github.com/0xc0d/CVE-2020-11651
    [CVE-2020-11652]
  23. GitHub: https://github.com/Mr-xn/Penetration_Testing_POC
    [CVE-2020-11652]
  24. GitHub: https://github.com/appcheck-ng/salt-rce-scanner-CVE-2020-11651-CVE-2020-11652
    [CVE-2020-11652: Scanning tool to test for SaltStack vulnerabilities CVE-2020-11651 & CVE-2020-11652. ...]
  25. GitHub: https://github.com/dwoz/salt-rekey
    [CVE-2020-11652]
  26. GitHub: https://github.com/fofapro/vulfocus
    [CVE-2020-11652]
  27. GitHub: https://github.com/kasini3000/kasini3000
    [CVE-2020-11652]
  28. GitHub: https://github.com/lovechinacoco/https-github.com-mai-lang-chai-Middleware-Vulnerability-detection
    [CVE-2020-11652]
  29. GitHub: https://github.com/rapyuta-robotics/clean-script
    [CVE-2020-11652]
  30. GitHub: https://github.com/tdtc7/qps
    [CVE-2020-11652]
  31. GitHub: https://github.com/0xc0d/CVE-2020-11651
    [CVE-2020-11651: CVE-2020-11651: Proof of Concept]
  32. GitHub: https://github.com/Al1ex/CVE-2020-11652
    [CVE-2020-11651: CVE-2020-11652 & CVE-2020-11651]
  33. GitHub: https://github.com/bravery9/SaltStack-Exp
    [CVE-2020-11651: CVE-2020-11651&&CVE-2020-11652 EXP]
  34. GitHub: https://github.com/chef-cft/salt-vulnerabilities
    [CVE-2020-11651: Checks for CVE-2020-11651 and CVE-2020-11652]
  35. GitHub: https://github.com/heikanet/CVE-2020-11651-CVE-2020-11652-EXP
    [CVE-2020-11651: CVE-2020-11651&&CVE-2020-11652 EXP]
  36. GitHub: https://github.com/Imanfeng/SaltStack-Exp
    [CVE-2020-11651: CVE-2020-11651&&CVE-2020-11652 EXP]
  37. GitHub: https://github.com/jasperla/CVE-2020-11651-poc
    [CVE-2020-11651: PoC exploit of CVE-2020-11651 and CVE-2020-11652]
  38. GitHub: https://github.com/kevthehermit/CVE-2020-11651
    [CVE-2020-11651: PoC for CVE-2020-11651]
  39. GitHub: https://github.com/RakhithJK/CVE-2020-11651
    [CVE-2020-11651: PoC for CVE-2020-11651]
  40. GitHub: https://github.com/rossengeorgiev/salt-security-backports
    [CVE-2020-11651: Salt security backports for CVE-2020-11651 & CVE-2020-11652]
  41. GitHub: https://github.com/Al1ex/CVE-2020-11652
    [CVE-2020-11652: CVE-2020-11652 & CVE-2020-11651]
  42. GitHub: https://github.com/bravery9/SaltStack-Exp
    [CVE-2020-11652: CVE-2020-11651&&CVE-2020-11652 EXP]
  43. GitHub: https://github.com/chef-cft/salt-vulnerabilities
    [CVE-2020-11652: Checks for CVE-2020-11651 and CVE-2020-11652]
  44. GitHub: https://github.com/heikanet/CVE-2020-11651-CVE-2020-11652-EXP
    [CVE-2020-11652: CVE-2020-11651&&CVE-2020-11652 EXP]
  45. GitHub: https://github.com/Imanfeng/SaltStack-Exp
    [CVE-2020-11652: CVE-2020-11651&&CVE-2020-11652 EXP]
  46. GitHub: https://github.com/jasperla/CVE-2020-11651-poc
    [CVE-2020-11652: PoC exploit of CVE-2020-11651 and CVE-2020-11652]
  47. GitHub: https://github.com/rossengeorgiev/salt-security-backports
    [CVE-2020-11652: Salt security backports for CVE-2020-11651 & CVE-2020-11652]
  48. GitHub: https://github.com/fanjq99/CVE-2020-11652
    [CVE-2020-11652: Saltstack CVE-2020-11652]

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-2020-11651
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)
STIG Severity [?]: II
STIG Risk Rating: Medium

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Plugin Source

This is the saltstack_3000_2_multiple_vulnerabilities.nasl nessus plugin source code. This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof. 

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136402);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/01/24");

  script_cve_id("CVE-2020-11651", "CVE-2020-11652");
  script_xref(name:"IAVA", value:"2020-A-0195-S");
  script_xref(name:"EDB-ID", value:"48421");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");

  script_name(english:"SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities");

  script_set_attribute(attribute:"synopsis", value:
"The version of SaltStack running on the remote server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the instance of SaltStack hosted on the remote server is prior to
2019.2.4, 3000.x prior to 3000.2. It is, therefore, affected by multiple vulnerabilities:

  - An authentication bypass vulnerabilities exists in the ClearFuncs class due to improper validation of
    method calls. An unauthenticated, remote attacker can exploit this by accessing exposed methods to trigger
    minions to run arbitrary commands as root, or to retrieve the root key to authenticate commands from the
    local root user on the master server. (CVE-2020-11651)

  - A directory traversal vulnerabilities exists in the ClearFuncs class due to improper path sanitization. An
    authenticated, remote attacker can exploit this by accessing the exposed get_token() method which allows
    the insertion of double periods in the filename parameter to read files outside of the intended directory.
    The only restriction is that the file has to be deserializable by salt.payload.Serial.loads().
    (CVE-2020-11652)");
  # https://labs.f-secure.com/advisories/saltstack-authorization-bypass
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4df67f57");
  script_set_attribute(attribute:"solution", value:
"Upgrade to SaltStack version 2019.2.4, 3000.2 or later.");
  script_set_attribute(attribute:"agent", value:"unix");
  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-2020-11651");

  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 Master/Minion Unauthenticated RCE');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/03/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:saltstack:salt");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

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

  script_dependencies("saltstack_salt_linux_installed.nbin");
  script_require_keys("installed_sw/SaltStack Salt Master");

  exit(0);
}

include('vcf.inc');

app_info = vcf::get_app_info(app:'SaltStack Salt Master');

vcf::check_all_backporting(app_info:app_info);

constraints = [
  { 'fixed_version' : '2019.2.0', 'fixed_display' : '2019.2.4, 3000.2 or later.' },
  { 'min_version' : '2019.2.0', 'fixed_version' : '2019.2.4' },
  { 'min_version' : '3000.0', 'fixed_version' : '3000.2' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);

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

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/saltstack_3000_2_multiple_vulnerabilities.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\saltstack_3000_2_multiple_vulnerabilities.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/saltstack_3000_2_multiple_vulnerabilities.nasl

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How to Run

Here is how to run the SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Misc. plugin family.
  6. On the right side table select SaltStack < 2019.2.4 / 3000.x < 3000.2 Multiple Vulnerabilities plugin ID 136402.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. 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 saltstack_3000_2_multiple_vulnerabilities.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a saltstack_3000_2_multiple_vulnerabilities.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - saltstack_3000_2_multiple_vulnerabilities.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 saltstack_3000_2_multiple_vulnerabilities.nasl -t <IP/HOST>

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References

IAVA | Information Assurance Vulnerability Alert:
  • 2020-A-0195-S
See also: Similar and related Nessus plugins:
  • 136979 - Debian DLA-2223-1 : salt security update
  • 136372 - Debian DSA-4676-1 : salt - security update
  • 136687 - FreeBSD : salt -- multiple vulnerabilities in salt-master process (6bf55af9-973b-11ea-9f2c-38d547003487)
  • 139012 - openSUSE Security Update : salt (openSUSE-2020-1074)
  • 136306 - openSUSE Security Update : salt (openSUSE-2020-564)
  • 151732 - openSUSE 15 Security Update : salt (openSUSE-SU-2021:2106-1)
  • 151062 - openSUSE 15 Security Update : salt (openSUSE-SU-2021:0899-1)
  • 136695 - Photon OS 1.0: Salt3 PHSA-2020-1.0-0294
  • 136694 - Photon OS 1.0: Salt PHSA-2020-1.0-0294
  • 136699 - Photon OS 3.0: Salt3 PHSA-2020-3.0-0091
  • 136423 - SaltStack < 2019.2.4 / 3000.x < 3000.2 Authentication Bypass (CVE-2020-11651)
  • 136169 - SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2020:1150-1)
  • 136170 - SUSE SLES15 Security Update : salt (SUSE-SU-2020:1151-1)
  • 138794 - SUSE SLES15 Security Update : Salt (SUSE-SU-2020:1973-1)
  • 138795 - SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2020:1974-1)
  • 139659 - Ubuntu 16.04 LTS / 18.04 LTS : Salt vulnerabilities (USN-4459-1)
  • 148112 - SaltStack < 3002.5 Multiple Vulnerabilities
  • 142489 - SaltStack < 3002 Multiple Vulnerabilities
  • 154852 - SaltStack 3000.x < 3001.8 / 3002.x < 3002.7 / 3003.x < 3003.3 Privilege Escalation
  • 146489 - SaltStack Unauthenticated RCE (direct check)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file saltstack_3000_2_multiple_vulnerabilities.nasl version 1.9. For more plugins, visit the Nessus Plugin Library.

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