Amazon Linux 2 : docker (ALASDOCKER-2022-017) - Nessus

High Plugin ID: 160411

This page contains detailed information about the Amazon Linux 2 : docker (ALASDOCKER-2022-017) 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: 160411
Name: Amazon Linux 2 : docker (ALASDOCKER-2022-017)
Filename: al2_ALASDOCKER-2022-017.nasl
Vulnerability Published: 2021-10-04
This Plugin Published: 2022-05-02
Last Modification Time: 2022-05-02
Plugin Version: 1.2
Plugin Type: local
Plugin Family: Amazon Linux Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/AmazonLinux/release, Host/AmazonLinux/rpm-list, Host/local_checks_enabled

Vulnerability Information

Severity: High
Vulnerability Published: 2021-10-04
Patch Published: 2022-03-07
CVE [?]: CVE-2021-41089, CVE-2021-41091, CVE-2021-41092
CPE [?]: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:docker, p-cpe:/a:amazon:linux:docker-debuginfo

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of docker installed on the remote host is prior to 20.10.7-3. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2DOCKER-2022-017 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)

- Moby is an open-source project created by Docker to enable software containerization. A bug was found in Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade limit access to the host to trusted users. Limit access to host volumes to trusted containers. (CVE-2021-41091)

- Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker CLI where running `docker login my-private-registry.example.com` with a misconfigured configuration file (typically `~/.docker/config.json`) listing a `credsStore` or `credHelpers` that could not be executed would result in any provided credentials being sent to `registry-1.docker.io` rather than the intended private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries in the configuration file reference an installed credential helper that is executable and on the PATH. (CVE-2021-41092)

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

Solution

Run 'yum update docker' to update your system.

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 Amazon Linux 2 : docker (ALASDOCKER-2022-017) 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-2021-41092
CVSS V2 Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N/E:U/RL:OF/RC:C

CVSS Base Score:	5.0 (Medium)
Impact Subscore:	2.9
Exploitability Subscore:	10.0
CVSS Temporal Score:	3.7 (Low)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	3.7 (Low)

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

CVSS Base Score:	7.5 (High)
Impact Subscore:	3.6
Exploitability Subscore:	3.9
CVSS Temporal Score:	6.5 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	6.5 (Medium)

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Plugin Source

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2 Security Advisory ALASDOCKER-2022-017.
##

include('compat.inc');

if (description)
{
  script_id(160411);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/05/02");

  script_cve_id("CVE-2021-41089", "CVE-2021-41091", "CVE-2021-41092");

  script_name(english:"Amazon Linux 2 : docker (ALASDOCKER-2022-017)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The version of docker installed on the remote host is prior to 20.10.7-3. It is, therefore, affected by multiple
vulnerabilities as referenced in the ALAS2DOCKER-2022-017 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)

  - Moby is an open-source project created by Docker to enable software containerization. A bug was found in
    Moby (Docker Engine) where the data directory (typically `/var/lib/docker`) contained subdirectories with
    insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory
    contents and execute programs. When containers included executable programs with extended permission bits
    (such as `setuid`), unprivileged Linux users could discover and execute those programs. When the UID of an
    unprivileged Linux user on the host collided with the file owner or group inside a container, the
    unprivileged Linux user on the host could discover, read, and modify those files. This bug has been fixed
    in Moby (Docker Engine) 20.10.9. Users should update to this version as soon as possible. Running
    containers should be stopped and restarted for the permissions to be fixed. For users unable to upgrade
    limit access to the host to trusted users. Limit access to host volumes to trusted containers.
    (CVE-2021-41091)

  - Docker CLI is the command line interface for the docker container runtime. A bug was found in the Docker
    CLI where running `docker login my-private-registry.example.com` with a misconfigured configuration file
    (typically `~/.docker/config.json`) listing a `credsStore` or `credHelpers` that could not be executed
    would result in any provided credentials being sent to `registry-1.docker.io` rather than the intended
    private registry. This bug has been fixed in Docker CLI 20.10.9. Users should update to this version as
    soon as possible. For users unable to update ensure that any configured credsStore or credHelpers entries
    in the configuration file reference an installed credential helper that is executable and on the PATH.
    (CVE-2021-41092)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/AL2/ALASDOCKER-2022-017.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2021-41089.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2021-41091.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2021-41092.html");
  script_set_attribute(attribute:"solution", value:
"Run 'yum update docker' to update your system.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  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:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-41092");

  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:"2021/10/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/05/02");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:docker");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:docker-debuginfo");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Amazon Linux 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/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var release = get_kb_item("Host/AmazonLinux/release");
if (isnull(release) || !strlen(release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
var os_ver = os_ver[1];
if (os_ver != "2")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2", "Amazon Linux " + os_ver);
}

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

var pkgs = [
    {'reference':'docker-20.10.7-3.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'docker-20.10.7-3.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'docker-debuginfo-20.10.7-3.amzn2', 'cpu':'aarch64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'docker-debuginfo-20.10.7-3.amzn2', 'cpu':'x86_64', 'release':'AL2', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var release = NULL;
  var cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var allowmaj = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['cpu'])) cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && release) {
    if (rpm_check(release:release, cpu:cpu, reference:reference, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "docker / docker-debuginfo");
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/al2_ALASDOCKER-2022-017.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\al2_ALASDOCKER-2022-017.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/al2_ALASDOCKER-2022-017.nasl

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How to Run

Here is how to run the Amazon Linux 2 : docker (ALASDOCKER-2022-017) 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 Amazon Linux Local Security Checks plugin family.
On the right side table select Amazon Linux 2 : docker (ALASDOCKER-2022-017) plugin ID 160411.
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 al2_ALASDOCKER-2022-017.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a al2_ALASDOCKER-2022-017.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - al2_ALASDOCKER-2022-017.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 al2_ALASDOCKER-2022-017.nasl -t <IP/HOST>

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References

See also:

Similar and related Nessus plugins:

158722 - Amazon Linux 2 : docker (ALAS-2022-017) (deprecated)
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)
153866 - Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 21.04 : docker.io vulnerability (USN-5103-1)

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file al2_ALASDOCKER-2022-017.nasl version 1.2. For more plugins, visit the Nessus Plugin Library.

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Amazon Linux 2 : docker (ALASDOCKER-2022-017) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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