CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
74.7%
This host is missing a security update for Mozilla Firefox.
# 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("1.3.6.1.4.1.25623.1.2.1.2021.38");
script_cve_id("CVE-2021-38491", "CVE-2021-38493", "CVE-2021-38494");
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:"2021-11-04 19:50:00 +0000 (Thu, 04 Nov 2021)");
script_name("Mozilla Firefox Security Advisory (MFSA2021-38) - 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:"MFSA2021-38");
script_xref(name:"URL", value:"https://www.mozilla.org/en-US/security/advisories/mfsa2021-38/");
script_xref(name:"URL", value:"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107");
script_xref(name:"URL", value:"https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723920%2C1725638");
script_xref(name:"URL", value:"https://bugzilla.mozilla.org/show_bug.cgi?id=1551886");
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-2021-38491: Mixed-Content-Blocking was unable to check opaque origins
Mixed-content checks were unable to analyze opaque origins which led to some mixed content being loaded.
CVE-2021-38493: Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1
Mozilla developers Gabriele Svelto and Tyson Smith reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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-2021-38494: Memory safety bugs fixed in Firefox 92
Mozilla developers Christian Holler and Lars T Hansen reported memory safety bugs present in Firefox 91. 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 92.");
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: "92")) {
report = report_fixed_ver(installed_version: version, fixed_version: "92", install_path: location);
security_message(port: 0, data: report);
exit(0);
}
exit(99);
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:M/Au:N/C:P/I:P/A:P
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
74.7%