6.4 Medium
AI Score
Confidence
Low
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.07 Low
EPSS
Percentile
93.9%
Dropbear SSH is prone to multiple vulnerabilities.
# Copyright (C) 2014 SCHUTZWERK 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 version 2
# (or any later version), as published by the Free Software Foundation.
#
# 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:dropbear_ssh_project:dropbear_ssh";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.105114");
script_version("2023-11-02T05:05:26+0000");
script_tag(name:"last_modification", value:"2023-11-02 05:05:26 +0000 (Thu, 02 Nov 2023)");
script_tag(name:"creation_date", value:"2014-11-07 12:40:00 +0100 (Fri, 07 Nov 2014)");
script_tag(name:"cvss_base", value:"5.0");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
script_cve_id("CVE-2013-4421", "CVE-2013-4434");
script_name("Dropbear SSH < 2013.59 Multiple Security Vulnerabilities");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2014 SCHUTZWERK GmbH");
script_family("General");
script_dependencies("gb_dropbear_consolidation.nasl");
script_mandatory_keys("dropbear_ssh/detected");
script_tag(name:"summary", value:"Dropbear SSH is prone to multiple vulnerabilities.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Multiple flaws are due to:
- The buf_decompress function in packet.c in Dropbear SSH Server before 2013.59
allows remote attackers to cause a denial of service (memory consumption)
via a compressed packet that has a large size when it is decompressed.
- Dropbear SSH Server before 2013.59 generates error messages for a failed
logon attempt with different time delays depending on whether the user account
exists.");
script_tag(name:"impact", value:"The flaws allows remote attackers to cause a denial of service
or to discover valid usernames.");
script_tag(name:"affected", value:"Versions prior to Dropbear SSH 2013.59 are vulnerable.");
script_tag(name:"solution", value:"Updates are available. Please see the references for
more information.");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/62958");
script_xref(name:"URL", value:"http://www.securityfocus.com/bid/62993");
script_xref(name:"URL", value:"https://matt.ucc.asn.au/dropbear/CHANGES");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
exit(0);
}
include("version_func.inc");
include("host_details.inc");
if( isnull( port = get_app_port( cpe:CPE ) ) ) exit( 0 );
if( ! infos = get_app_version_and_location( cpe:CPE, port:port, exit_no_version:TRUE ) ) exit( 0 );
vers = infos["version"];
path = infos["location"];
ver = eregmatch( pattern:"^([0-9]+)\.([0-9]+)", string:vers );
if( isnull( ver[2] ) ) exit( 0 );
if( int( ver[1] ) > 2013 ) exit( 99 );
if(version_is_less(version:ver[2], test_version:"59")) {
report = report_fixed_ver( installed_version:vers, fixed_version:"2013.59", install_path:path );
security_message( port:port, data:report );
exit( 0 );
}
exit( 99 );