Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) - Nessus

Medium Plugin ID: 153866

This page contains detailed information about the Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) 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
Vulnerability Information

Synopsis
Description
Solution

Public Exploits
Risk Information
Plugin Source
How to Run
References
Version

Plugin Overview

ID: 153866
Name: Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1)
Filename: ubuntu_USN-5103-1.nasl
Vulnerability Published: 2021-09-30
This Plugin Published: 2021-10-05
Last Modification Time: 2022-02-04
Plugin Version: 1.4
Plugin Type: local
Plugin Family: Ubuntu Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Vulnerability Information

Severity: Medium
Vulnerability Published: 2021-09-30
Patch Published: 2021-10-04
CVE [?]: CVE-2021-41089
CPE [?]: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:21.04, p-cpe:/a:canonical:ubuntu_linux:docker.io

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 host has a package installed that is affected by a vulnerability as referenced in the USN-5103-1 advisory.

- Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the host's filesystem, widening access to others. This bug does not directly allow files to be read, modified, or executed without an additional cooperating process. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers do not need to be restarted. (CVE-2021-41089)

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 docker.io package.

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 Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) vulnerability:

GitHub: https://github.com/ssst0n3/my_vulnerabilities
[CVE-2021-41089]
GitHub: https://github.com/ssst0n3/ssst0n3
[CVE-2021-41089]

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-2021-41089
CVSS V2 Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C

CVSS Base Score:	4.4 (Medium)
Impact Subscore:	6.4
Exploitability Subscore:	3.4
CVSS Temporal Score:	3.3 (Low)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	3.3 (Low)

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

CVSS Base Score:	6.3 (Medium)
Impact Subscore:	3.7
Exploitability Subscore:	2.0
CVSS Temporal Score:	5.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.5 (Medium)

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Plugin Source

This is the ubuntu_USN-5103-1.nasl nessus plugin source code. Ubuntu Security Notice (C) 2021-2022 Canonical, Inc. / NASL script (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5103-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153866);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/02/04");

  script_cve_id("CVE-2021-41089");
  script_xref(name:"USN", value:"5103-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 host has a package installed that is affected by a
vulnerability as referenced in the USN-5103-1 advisory.

  - Moby is an open-source project created by Docker to enable software containerization. A bug was found in
    Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container
    can result in Unix file permission changes for existing files in the host's filesystem, widening access to
    others. This bug does not directly allow files to be read, modified, or executed without an additional
    cooperating process. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this
    version as soon as possible. Running containers do not need to be restarted. (CVE-2021-41089)

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://ubuntu.com/security/notices/USN-5103-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected docker.io package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-41089");

  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:"2021/09/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:21.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:docker.io");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2021-2022 Canonical, Inc. / NASL script (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
include('ubuntu.inc');
include('misc_func.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var release = get_kb_item('Host/Ubuntu/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
var release = chomp(release);
if (! preg(pattern:"^(16\.04|18\.04|20\.04|21\.04)$", string:release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 21.04', 'Ubuntu ' + release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

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


var pkgs = [
    {'osver': '16.04', 'pkgname': 'docker.io', 'pkgver': '18.09.7-0ubuntu1~16.04.9+esm1'},
    {'osver': '18.04', 'pkgname': 'docker.io', 'pkgver': '20.10.7-0ubuntu1~18.04.2'},
    {'osver': '20.04', 'pkgname': 'docker.io', 'pkgver': '20.10.7-0ubuntu1~20.04.2'},
    {'osver': '21.04', 'pkgname': 'docker.io', 'pkgver': '20.10.7-0ubuntu1~21.04.2'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'docker.io');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/ubuntu_USN-5103-1.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\ubuntu_USN-5103-1.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/ubuntu_USN-5103-1.nasl

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How to Run

Here is how to run the Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) 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 Ubuntu Local Security Checks plugin family.
On the right side table select Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) plugin ID 153866.
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 ubuntu_USN-5103-1.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a ubuntu_USN-5103-1.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - ubuntu_USN-5103-1.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 ubuntu_USN-5103-1.nasl -t <IP/HOST>

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References

USN | Ubuntu Security Notice:

5103-1

See also:

Similar and related Nessus plugins:

158722 - Amazon Linux 2 : docker (ALAS-2022-017) (deprecated)
160411 - Amazon Linux 2 : docker (ALASDOCKER-2022-017)
153861 - Amazon Linux AMI : docker (ALAS-2021-1537)
154769 - openSUSE 15 Security Update : containerd, docker, runc (openSUSE-SU-2021:1404-1)
154606 - openSUSE 15 Security Update : containerd, docker, runc (openSUSE-SU-2021:3506-1)
157398 - openSUSE 15 Security Update : containerd, docker (openSUSE-SU-2022:0334-1)
153929 - Photon OS 1.0: Docker PHSA-2021-1.0-0439
153979 - Photon OS 2.0: Docker PHSA-2021-2.0-0402
153946 - Photon OS 3.0: Docker PHSA-2021-3.0-0311
153973 - Photon OS 4.0: Docker PHSA-2021-4.0-0113
154100 - SUSE SLES12 Security Update : containerd, docker, runc (SUSE-SU-2021:3336-1)
154638 - SUSE SLES15 Security Update : containerd, docker, runc (SUSE-SU-2021:3506-1)
157188 - SUSE SLES12 Security Update : containerd, docker (SUSE-SU-2022:0213-1)
157388 - SUSE SLES15 Security Update : containerd, docker (SUSE-SU-2022:0334-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file ubuntu_USN-5103-1.nasl version 1.4. For more plugins, visit the Nessus Plugin Library.

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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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