CentOS 8 : firefox (CESA-2020:0111) - Nessus

High Plugin ID: 145921

This page contains detailed information about the CentOS 8 : firefox (CESA-2020:0111) 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: 145921
Name: CentOS 8 : firefox (CESA-2020:0111)
Filename: centos8_RHSA-2020-0111.nasl
Vulnerability Published: 2020-01-08
This Plugin Published: 2021-02-01
Last Modification Time: 2021-11-30
Plugin Version: 1.7
Plugin Type: local
Plugin Family: CentOS Local Security Checks
Dependencies: ssh_get_info.nasl
Required KB Items [?]: Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu, Host/local_checks_enabled

Vulnerability Information

Severity: High
Vulnerability Published: 2020-01-08
Patch Published: 2020-01-14
CVE [?]: CVE-2019-17016, CVE-2019-17017, CVE-2019-17022, CVE-2019-17024, CVE-2019-17026
CPE [?]: cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:firefox
Exploited by Malware: True

Synopsis

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

Description

The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2020:0111 advisory.

- Mozilla: Bypass of @namespace CSS sanitization during pasting (CVE-2019-17016)

- Mozilla: Type Confusion in XPCVariant.cpp (CVE-2019-17017)

- Mozilla: CSS sanitization does not escape HTML tags (CVE-2019-17022)

- Mozilla: Memory safety bugs fixed in Firefox 72 and Firefox ESR 68.4 (CVE-2019-17024)

- Mozilla: IonMonkey type confusion with StoreElementHole and FallibleStoreElement (CVE-2019-17026)

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 firefox package.

Public Exploits

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

Here's the list of publicly known exploits and PoCs for verifying the CentOS 8 : firefox (CESA-2020:0111) vulnerability:

Exploit-DB: exploits/windows_x86-64/local/49864.js
[EDB-49864: Firefox 72 IonMonkey - JIT Type Confusion]
Exploit-DB: exploits/windows/local/50691.txt
[EDB-50691: Mozilla Firefox 67 - Array.pop JIT Type Confusion]
GitHub: https://github.com/HackOvert/awesome-bugs
[CVE-2019-17026]
GitHub: https://github.com/cloudrise/lansweeper-reports
[CVE-2019-17026]
GitHub: https://github.com/forrest-orr/DoubleStar
[CVE-2019-17026]
GitHub: https://github.com/lsw29475/CVE-2019-17026
[CVE-2019-17026]
GitHub: https://github.com/mgaudet/SpiderMonkeyBibliography
[CVE-2019-17026]
GitHub: https://github.com/v3nt4n1t0/DetectMozillaFirefoxVulnDomain.ps1
[CVE-2019-17026]
GitHub: https://github.com/maxpl0it/CVE-2019-17026-Exploit
[CVE-2019-17026: An exploit for CVE-2019-17026. It pops xcalc and was tested on Ubuntu (x64).]

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-2019-17026
CVSS V2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P/E:H/RL:OF/RC:C

CVSS Base Score:	6.8 (Medium)
Impact Subscore:	6.4
Exploitability Subscore:	8.6
CVSS Temporal Score:	5.9 (Medium)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	5.9 (Medium)

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

CVSS Base Score:	8.8 (High)
Impact Subscore:	5.9
Exploitability Subscore:	2.8
CVSS Temporal Score:	8.4 (High)
CVSS Environmental Score:	NA (None)
Modified Impact Subscore:	NA
Overall CVSS Score:	8.4 (High)

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Plugin Source

##
# (C) Tenable Network Security, Inc.
#
# The package checks in this plugin were extracted from
# Red Hat Security Advisory RHSA-2020:0111. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(145921);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/11/30");

  script_cve_id(
    "CVE-2019-17016",
    "CVE-2019-17017",
    "CVE-2019-17022",
    "CVE-2019-17024",
    "CVE-2019-17026"
  );
  script_xref(name:"RHSA", value:"2020:0111");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");

  script_name(english:"CentOS 8 : firefox (CESA-2020:0111)");

  script_set_attribute(attribute:"synopsis", value:
"The remote CentOS host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the
CESA-2020:0111 advisory.

  - Mozilla: Bypass of @namespace CSS sanitization during pasting (CVE-2019-17016)

  - Mozilla: Type Confusion in XPCVariant.cpp (CVE-2019-17017)

  - Mozilla: CSS sanitization does not escape HTML tags (CVE-2019-17022)

  - Mozilla: Memory safety bugs fixed in Firefox 72 and Firefox ESR 68.4 (CVE-2019-17024)

  - Mozilla: IonMonkey type confusion with StoreElementHole and FallibleStoreElement (CVE-2019-17026)

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://access.redhat.com/errata/RHSA-2020:0111");
  script_set_attribute(attribute:"solution", value:
"Update the affected firefox package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:R/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-2019-17026");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"exploited_by_malware", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:centos:centos:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:centos:centos:firefox");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CentOS 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/CentOS/release", "Host/CentOS/rpm-list", "Host/cpu");

  exit(0);
}


include('audit.inc');
include('global_settings.inc');
include('misc_func.inc');
include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item('Host/CentOS/release');
if (isnull(release) || 'CentOS' >!< release) audit(AUDIT_OS_NOT, 'CentOS');
os_ver = pregmatch(pattern: "CentOS(?: Stream)?(?: Linux)? release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'CentOS');
os_ver = os_ver[1];
if ('CentOS Stream' >< release) audit(AUDIT_OS_NOT, 'CentOS 8.x', 'CentOS Stream ' + os_ver);
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '8')) audit(AUDIT_OS_NOT, 'CentOS 8.x', 'CentOS ' + os_ver);

if (!get_kb_item('Host/CentOS/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'CentOS', cpu);

pkgs = [
    {'reference':'firefox-68.4.1-1.el8_1', 'cpu':'aarch64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE},
    {'reference':'firefox-68.4.1-1.el8_1', 'cpu':'x86_64', 'release':'8', 'rpm_spec_vers_cmp':TRUE, 'allowmaj':TRUE}
];

flag = 0;
foreach package_array ( pkgs ) {
  reference = NULL;
  release = NULL;
  sp = NULL;
  cpu = NULL;
  el_string = NULL;
  rpm_spec_vers_cmp = NULL;
  epoch = NULL;
  allowmaj = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) release = 'CentOS-' + package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  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['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && release) {
    if (rpm_check(release:release, sp:sp, cpu:cpu, reference:reference, epoch:epoch, 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
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'firefox');
}

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

Linux / Unix:
/opt/nessus/lib/nessus/plugins/centos8_RHSA-2020-0111.nasl
Windows:
C:\ProgramData\Tenable\Nessus\nessus\plugins\centos8_RHSA-2020-0111.nasl
Mac OS X:
/Library/Nessus/run/lib/nessus/plugins/centos8_RHSA-2020-0111.nasl

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How to Run

Here is how to run the CentOS 8 : firefox (CESA-2020:0111) 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 CentOS Local Security Checks plugin family.
On the right side table select CentOS 8 : firefox (CESA-2020:0111) plugin ID 145921.
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 centos8_RHSA-2020-0111.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a centos8_RHSA-2020-0111.nasl -t <IP/HOST>

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

/opt/nessus/bin/nasl -T - centos8_RHSA-2020-0111.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 centos8_RHSA-2020-0111.nasl -t <IP/HOST>

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References

RHSA | Red Hat Security Advisory:

2020:0111

See also:

Similar and related Nessus plugins:

133106 - Debian DSA-4603-1 : thunderbird - security update
133128 - Scientific Linux Security Update : thunderbird on SL6.x i386/x86_64 (20200116)
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133153 - Oracle Linux 8 : thunderbird (ELSA-2020-0127)
133199 - openSUSE Security Update : MozillaThunderbird (openSUSE-2020-94)
133384 - RHEL 8 : thunderbird (RHSA-2020:0292)
133386 - RHEL 8 : firefox (RHSA-2020:0295)
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159783 - EulerOS 2.0 SP9 : mozjs60 (EulerOS-SA-2022-1431)
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Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file centos8_RHSA-2020-0111.nasl version 1.7. For more plugins, visit the Nessus Plugin Library.

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CentOS 8 : firefox (CESA-2020:0111) - Nessus

Plugin Overview

Vulnerability Information

Synopsis

Description

Solution

Public Exploits

Risk Information

Plugin Source

How to Run

References

Version

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