3.2 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
5.4 Medium
AI Score
Confidence
Low
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
21.6%
QEMU is prone to a denial of service (DoS) vulnerability.
# 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.
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.113794");
script_version("2022-03-08T11:05:40+0000");
script_tag(name:"last_modification", value:"2022-03-08 11:05:40 +0000 (Tue, 08 Mar 2022)");
script_tag(name:"creation_date", value:"2021-03-04 10:53:37 +0000 (Thu, 04 Mar 2021)");
script_tag(name:"cvss_base", value:"2.1");
script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:N/I:N/A:P");
script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L");
script_tag(name:"severity_origin", value:"NVD");
script_tag(name:"severity_date", value:"2021-04-11 01:15:00 +0000 (Sun, 11 Apr 2021)");
script_tag(name:"qod_type", value:"executable_version_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_cve_id("CVE-2021-20203");
script_name("QEMU <= 5.2.0 DoS Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("Denial of Service");
script_dependencies("secpod_qemu_detect_lin.nasl");
script_mandatory_keys("QEMU/Lin/Ver");
script_tag(name:"summary", value:"QEMU is prone to a denial of service (DoS) vulnerability.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"The vulnerability exists because of an integer overflow
vulnerability in the vmxnet3 NIC emulator.");
script_tag(name:"impact", value:"Successful exploitation would allow an authenticated local
attacker to crash the application.");
script_tag(name:"affected", value:"QEMU through version 5.2.0.");
script_tag(name:"solution", value:"Update to version 6.1.1, 6.2.0 or later.");
script_xref(name:"URL", value:"https://gitlab.com/qemu-project/qemu/-/issues/308");
script_xref(name:"URL", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1922441");
exit(0);
}
CPE = "cpe:/a:qemu:qemu";
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_equal( version: version, test_version: "5.2.0" ) ) {
report = report_fixed_ver( installed_version: version, fixed_version: "6.1.1/6.2.0", install_path: location );
security_message( data: report, port: 0 );
exit( 0 );
}
exit( 99 );
3.2 Low
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L
5.4 Medium
AI Score
Confidence
Low
2.1 Low
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:L/AC:L/Au:N/C:N/I:N/A:P
0.001 Low
EPSS
Percentile
21.6%