Mozilla Firefox Security Advisory (MFSA2020-05) - Linux

# Copyright (C) 2021 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:mozilla:firefox";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.2.1.2020.05");
  script_cve_id("CVE-2020-6796", "CVE-2020-6798", "CVE-2020-6800", "CVE-2020-6801");
  script_tag(name:"creation_date", value:"2021-11-08 15:21:25 +0000 (Mon, 08 Nov 2021)");
  script_version("2022-09-22T10:44:54+0000");
  script_tag(name:"last_modification", value:"2022-09-22 10:44:54 +0000 (Thu, 22 Sep 2022)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-03-11 23:15:00 +0000 (Wed, 11 Mar 2020)");

  script_name("Mozilla Firefox Security Advisory (MFSA2020-05) - Linux");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_firefox_detect_lin.nasl");
  script_mandatory_keys("mozilla/firefox/linux/detected");

  script_xref(name:"Advisory-ID", value:"MFSA2020-05");
  script_xref(name:"URL", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2020-05/");
  script_xref(name:"URL", value:"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1595786%2C1596706%2C1598543%2C1604851%2C1608580%2C1608785%2C1605777");
  script_xref(name:"URL", value:"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1601024%2C1601712%2C1604836%2C1606492");
  script_xref(name:"URL", value:"https://bugzilla.mozilla.org/show_bug.cgi?id=1602944");
  script_xref(name:"URL", value:"https://bugzilla.mozilla.org/show_bug.cgi?id=1610426");

  script_tag(name:"summary", value:"This host is missing a security update for Mozilla Firefox.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"CVE-2020-6796: Missing bounds check on shared memory read in the parent process
A content process could have modified shared memory relating to crash reporting information, crash itself, and cause an out-of-bound write. This could have caused memory corruption and a potentially exploitable crash.

CVE-2020-6798: Incorrect parsing of template tag could result in JavaScript injection
If a <template> tag was used in a <select%gt, tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result.

CVE-2020-6800: Memory safety bugs fixed in Firefox 73 and Firefox ESR 68.5
Mozilla developers and community members Raul Gurzau, Tyson Smith, Bob Clary, Liz Henry, and Christian Holler reported memory safety bugs present in Firefox 72 and Firefox ESR 68.4. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.

CVE-2020-6801: Memory safety bugs fixed in Firefox 73
Mozilla developers Jason Kratzer, Tyson Smith, and Christian Holler reported memory safety bugs present in Firefox 72. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.");

  script_tag(name:"affected", value:"Firefox version(s) below 73.");

  script_tag(name:"solution", value:"The vendor has released an update. Please see the reference(s) for more information.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"executable_version_unreliable");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!infos = get_app_version_and_location(cpe: CPE, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_is_less(version: version, test_version: "73")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "73", install_path: location);
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);