FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) - Nessus

High Plugin ID: 157319

This page contains detailed information about the FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) 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: 157319
Name: FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1)
Filename: freebsd_pkg_8579074c839f11eca3b2005056a311d1.nasl
Vulnerability Published: 2022-01-10
This Plugin Published: 2022-02-02
Last Modification Time: 2022-02-28
Plugin Version: 1.4
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: High
Vulnerability Published: 2022-01-10
Patch Published: 2022-02-01
CVE [?]: CVE-2021-43566, CVE-2021-44141, CVE-2021-44142, CVE-2022-0336
CPE [?]: cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:samba413, p-cpe:/a:freebsd:freebsd:samba414, p-cpe:/a:freebsd:freebsd:samba415

Synopsis

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

Description

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 8579074c-839f-11ec-a3b2-005056a311d1 advisory.

- The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide ...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

- All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to allow a directory to be created in an area of the server file system not exported under the share definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack to succeed. (CVE-2021-43566)

- All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed. (CVE-2021-44141)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) vulnerability:

GitHub: https://github.com/backloop-biz/CVE_checks
[CVE-2021-44142]
GitHub: https://github.com/gudyrmik/CVE-2021-44142
[CVE-2021-44142]
GitHub: https://github.com/horizon3ai/CVE-2021-44142
[CVE-2021-44142]
GitHub: https://github.com/hrsman/Samba-CVE-2021-44142
[CVE-2021-44142]

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-2021-44142
CVSS V2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:U/RL:OF/RC:C

CVSS Base Score:	9.0 (High)
Impact Subscore:	10.0
Exploitability Subscore:	8.0
CVSS Temporal Score:	6.7 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.7 (Medium)

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

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	7.7 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	7.7 (High)

STIG Severity [?]: III
STIG Risk Rating: Low

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Plugin Source

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# @NOAGENT@
#
# The descriptive text and package checks in this plugin were
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2021 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('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(157319);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/28");

  script_cve_id(
    "CVE-2021-43566",
    "CVE-2021-44141",
    "CVE-2021-44142",
    "CVE-2022-0336"
  );
  script_xref(name:"IAVA", value:"2022-A-0020");

  script_name(english:"FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple
vulnerabilities as referenced in the 8579074c-839f-11ec-a3b2-005056a311d1 advisory.

  - The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide ...enhanced compatibility
    with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver. Samba versions prior to
    4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via
    specially crafted extended file attributes. A remote attacker with write access to extended file
    attributes can execute arbitrary code with the privileges of smbd, typically root. (CVE-2021-44142)

  - All versions of Samba prior to 4.13.16 are vulnerable to a malicious client using an SMB1 or NFS race to
    allow a directory to be created in an area of the server file system not exported under the share
    definition. Note that SMB1 has to be enabled, or the share also available via NFS in order for this attack
    to succeed. (CVE-2021-43566)

  - All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to
    determine if a file or directory exists in an area of the server file system not exported under the share
    definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.
    (CVE-2021-44141)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2021-43566.html");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2021-44141.html");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2021-44142.html");
  script_set_attribute(attribute:"see_also", value:"https://www.samba.org/samba/security/CVE-2022-0336.html");
  # https://vuxml.freebsd.org/freebsd/8579074c-839f-11ec-a3b2-005056a311d1.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fb46416f");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-44142");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2022/01/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/02/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/02/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:samba413");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:samba414");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:samba415");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
  script_set_attribute(attribute:"stig_severity", value:"III");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 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);


var flag = 0;

var packages = [
    'samba413<4.13.17',
    'samba414<4.14.12',
    'samba415<4.15.5'
];

foreach var package( packages ) {
    if (pkg_test(save_report:TRUE, pkg: package)) flag++;
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : pkg_report_get()
  );
  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_8579074c839f11eca3b2005056a311d1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\freebsd_pkg_8579074c839f11eca3b2005056a311d1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/freebsd_pkg_8579074c839f11eca3b2005056a311d1.nasl

Go back to menu.

How to Run

Here is how to run the FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) 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 : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) plugin ID 157319.
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_8579074c839f11eca3b2005056a311d1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a freebsd_pkg_8579074c839f11eca3b2005056a311d1.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_8579074c839f11eca3b2005056a311d1.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_8579074c839f11eca3b2005056a311d1.nasl -t <IP/HOST>

Go back to menu.

References

IAVA | Information Assurance Vulnerability Alert:

2022-A-0020

See also:

Similar and related Nessus plugins:

159812 - EulerOS 2.0 SP9 : samba (EulerOS-SA-2022-1438)
159779 - EulerOS 2.0 SP9 : samba (EulerOS-SA-2022-1459)
160148 - EulerOS 2.0 SP8 : samba (EulerOS-SA-2022-1586)
160592 - EulerOS Virtualization 2.9.1 : samba (EulerOS-SA-2022-1614)
157325 - openSUSE 15 Security Update : samba (openSUSE-SU-2022:0283-1)
157307 - SUSE SLED15 / SLES15 Security Update : samba (SUSE-SU-2022:0283-1)
157373 - SUSE SLED12 / SLES12 Security Update : samba (SUSE-SU-2022:0323-1)
157286 - Ubuntu 20.04 LTS / 21.10 : Samba vulnerabilities (USN-5260-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file freebsd_pkg_8579074c839f11eca3b2005056a311d1.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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FreeBSD : samba -- Multiple Vulnerabilities (8579074c-839f-11ec-a3b2-005056a311d1) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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