SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1) - Nessus

Critical   Plugin ID: 146904

This page contains detailed information about the SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1) 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: 146904
Name: SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1)
Filename: suse_SU-2021-0630-1.nasl
Vulnerability Published: 2021-02-27
This Plugin Published: 2021-03-01
Last Modification Time: 2021-11-09
Plugin Version: 1.8
Plugin Type: local
Plugin Family: SuSE Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/local_checks_enabled, Host/SuSE/release, Host/SuSE/rpm-list

Vulnerability Information

Severity: Critical
Vulnerability Published: 2021-02-27
Patch Published: 2021-02-26
CVE [?]: CVE-2020-28243, CVE-2020-28972, CVE-2020-35662, CVE-2021-3144, CVE-2021-3148, CVE-2021-3197, CVE-2021-25281, CVE-2021-25282, CVE-2021-25283, CVE-2021-25284
CPE [?]: cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:python2-salt, p-cpe:/a:novell:suse_linux:python3-salt, p-cpe:/a:novell:suse_linux:salt, p-cpe:/a:novell:suse_linux:salt-api, p-cpe:/a:novell:suse_linux:salt-cloud, p-cpe:/a:novell:suse_linux:salt-doc, p-cpe:/a:novell:suse_linux:salt-master, p-cpe:/a:novell:suse_linux:salt-minion, p-cpe:/a:novell:suse_linux:salt-proxy, p-cpe:/a:novell:suse_linux:salt-ssh, p-cpe:/a:novell:suse_linux:salt-standalone-formulas-configuration, p-cpe:/a:novell:suse_linux:salt-syndic

Synopsis

The remote SUSE host is missing one or more security updates.

Description

This update for salt fixes the following issues :

Fix regression on cmd.run when passing tuples as cmd (bsc#1182740)

Allow `extra_filerefs` as sanitized `kwargs` for SSH client

Fix errors with virt.update

Fix for multiple for security issues (CVE-2020-28243) (CVE-2020-28972) (CVE-2020-35662) (CVE-2021-3148) (CVE-2021-3144) (CVE-2021-25281) (CVE-2021-25282) (CVE-2021-25283) (CVE-2021-25284) (CVE-2021-3197) (bsc#1181550) (bsc#1181556) (bsc#1181557) (bsc#1181558) (bsc#1181559) (bsc#1181560) (bsc#1181561) (bsc#1181562) (bsc#1181563) (bsc#1181564) (bsc#1181565)

virt: search for `grub.xen` path

Xen spicevmc, DNS SRV records backports :

- Fix virtual network generated DNS XML for SRV records

- Don't add spicevmc channel to xen VMs

virt UEFI fix: virt.update when `efi=True`

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

Solution

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Server Applications 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP2-2021-630=1

SUSE Linux Enterprise Module for Python2 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Python2-15-SP2-2021-630=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-630=1

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 SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1) vulnerability:

  1. Metasploit: exploit/linux/http/saltstack_salt_wheel_async_rce
    [SaltStack Salt API Unauthenticated RCE through wheel_async client]
  2. GitHub: https://github.com/EdgeSecurityTeam/Vulnerability
    [CVE-2021-25281]
  3. GitHub: https://github.com/0ps/pocassistdb
    [CVE-2021-25282]
  4. GitHub: https://github.com/jweny/pocassistdb
    [CVE-2021-25282]
  5. GitHub: https://github.com/stealthcopter/CVE-2020-28243
    [CVE-2020-28243: CVE-2020-28243 Local Privledge Escalation Exploit in SaltStack Minion]
  6. GitHub: https://github.com/Immersive-Labs-Sec/CVE-2021-25281
    [CVE-2021-25281: Chaining CVE-2021-25281 and CVE-2021-25282 to exploit a SaltStack]
  7. GitHub: https://github.com/SkyBulk/CVE-2021-25281
    [CVE-2021-25281: Demo testing CVE-2021-25281]
  8. GitHub: https://github.com/Immersive-Labs-Sec/CVE-2021-25281
    [CVE-2021-25282: Chaining CVE-2021-25281 and CVE-2021-25282 to exploit a SaltStack]

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-2021-3197
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P/E:F/RL:OF/RC:C
CVSS Base Score:7.5 (High)
Impact Subscore:6.4
Exploitability Subscore:10.0
CVSS Temporal Score:6.2 (Medium)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:6.2 (Medium)
CVSS V3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
CVSS Base Score:9.8 (Critical)
Impact Subscore:5.9
Exploitability Subscore:3.9
CVSS Temporal Score:9.1 (Critical)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:9.1 (Critical)
STIG Severity [?]: I
STIG Risk Rating: High

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Plugin Source

This is the suse_SU-2021-0630-1.nasl nessus plugin source code. This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof. 

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2021:0630-1.
# The text itself is copyright (C) SUSE.
#

include('compat.inc');

if (description)
{
  script_id(146904);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/11/09");

  script_cve_id(
    "CVE-2020-28243",
    "CVE-2020-28972",
    "CVE-2020-35662",
    "CVE-2021-25281",
    "CVE-2021-25282",
    "CVE-2021-25283",
    "CVE-2021-25284",
    "CVE-2021-3144",
    "CVE-2021-3148",
    "CVE-2021-3197"
  );
  script_xref(name:"IAVA", value:"2021-A-0112-S");

  script_name(english:"SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"This update for salt fixes the following issues :

Fix regression on cmd.run when passing tuples as cmd (bsc#1182740)

Allow `extra_filerefs` as sanitized `kwargs` for SSH client

Fix errors with virt.update

Fix for multiple for security issues (CVE-2020-28243) (CVE-2020-28972)
(CVE-2020-35662) (CVE-2021-3148) (CVE-2021-3144) (CVE-2021-25281)
(CVE-2021-25282) (CVE-2021-25283) (CVE-2021-25284) (CVE-2021-3197)
(bsc#1181550) (bsc#1181556) (bsc#1181557) (bsc#1181558) (bsc#1181559)
(bsc#1181560) (bsc#1181561) (bsc#1181562) (bsc#1181563) (bsc#1181564)
(bsc#1181565)

virt: search for `grub.xen` path

Xen spicevmc, DNS SRV records backports :

  - Fix virtual network generated DNS XML for SRV records

  - Don't add spicevmc channel to xen VMs

virt UEFI fix: virt.update when `efi=True`

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181550");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181556");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181557");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181558");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181559");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181560");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181561");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181562");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181563");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181564");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1181565");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.suse.com/show_bug.cgi?id=1182740");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-28243/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-28972/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2020-35662/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-25281/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-25282/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-25283/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-25284/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3144/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3148/");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2021-3197/");
  # https://www.suse.com/support/update/announcement/2021/suse-su-20210630-1
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?160025cd");
  script_set_attribute(attribute:"solution", value:
"To install this SUSE Security Update use the SUSE recommended
installation methods like YaST online_update or 'zypper patch'.

Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Module for Server Applications 15-SP2 :

zypper in -t patch
SUSE-SLE-Module-Server-Applications-15-SP2-2021-630=1

SUSE Linux Enterprise Module for Python2 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Python2-15-SP2-2021-630=1

SUSE Linux Enterprise Module for Basesystem 15-SP2 :

zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP2-2021-630=1");
  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:F/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:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-3197");

  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 API Unauthenticated RCE through wheel_async client');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:python2-salt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:python3-salt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-cloud");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-master");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-minion");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-proxy");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-ssh");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-standalone-formulas-configuration");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:salt-syndic");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:15");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLED15|SLES15)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLED15 / SLES15", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES15" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLES15 SP2", os_ver + " SP" + sp);
if (os_ver == "SLED15" && (! preg(pattern:"^(2)$", string:sp))) audit(AUDIT_OS_NOT, "SLED15 SP2", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES15", sp:"2", reference:"python2-salt-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"python3-salt-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-api-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-cloud-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-doc-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-master-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-minion-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-proxy-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-ssh-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-standalone-formulas-configuration-3000-24.1")) flag++;
if (rpm_check(release:"SLES15", sp:"2", reference:"salt-syndic-3000-24.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"python2-salt-3000-24.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"python3-salt-3000-24.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"salt-3000-24.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"salt-doc-3000-24.1")) flag++;
if (rpm_check(release:"SLED15", sp:"2", reference:"salt-minion-3000-24.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:rpm_report_get());
  else security_hole(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "salt");
}

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

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/suse_SU-2021-0630-1.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\suse_SU-2021-0630-1.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/suse_SU-2021-0630-1.nasl

Go back to menu.

How to Run

Here is how to run the SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1) 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 SuSE Local Security Checks plugin family.
  6. On the right side table select SUSE SLED15 / SLES15 Security Update : salt (SUSE-SU-2021:0630-1) plugin ID 146904.
  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 suse_SU-2021-0630-1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a suse_SU-2021-0630-1.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - suse_SU-2021-0630-1.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 suse_SU-2021-0630-1.nasl -t <IP/HOST>

Go back to menu.

References

IAVA | Information Assurance Vulnerability Alert:
  • 2021-A-0112-S
See also: Similar and related Nessus plugins:
  • 143512 - Debian DLA-2480-2 : salt regression update
  • 155123 - Debian DLA-2815-1 : salt - LTS security update
  • 155634 - Debian DSA-5011-1 : salt - security update
  • 146977 - Fedora 33 : salt (2021-5756fbf8a6)
  • 146970 - Fedora 32 : salt (2021-904a2dbc0c)
  • 146985 - FreeBSD : salt -- multiple vulnerabilities (a1e03a3d-7be0-11eb-b392-20cf30e32f6d)
  • 148273 - GLSA-202103-01 : Salt: Multiple vulnerabilities
  • 146897 - openSUSE Security Update : salt (openSUSE-2021-347)
  • 146877 - Photon OS 1.0: Salt3 PHSA-2021-1.0-0364
  • 146878 - Photon OS 1.0: Salt PHSA-2021-1.0-0364
  • 146874 - Photon OS 3.0: Salt3 PHSA-2021-3.0-0200
  • 150920 - Photon OS 4.0: Salt3 PHSA-2021-4.0-0047
  • 148112 - SaltStack < 3002.5 Multiple Vulnerabilities
  • 146921 - SUSE SLES15 Security Update : salt (SUSE-SU-2021:0628-1)
  • 146885 - SUSE SLES15 Security Update : salt (SUSE-SU-2021:0631-1)
  • 150586 - SUSE SLES11 Security Update : salt (SUSE-SU-2021:14650-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file suse_SU-2021-0630-1.nasl version 1.8. For more plugins, visit the Nessus Plugin Library.

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