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
AI Score
Confidence
Low
EPSS
Percentile
81.2%
sshd in OpenSSH 3.5p1, when PermitRootLogin is disabled,
immediately closes the TCP connection after a root login attempt with the correct password, but
leaves the connection open after an attempt with an incorrect password, which makes it easier for
remote attackers to guess the password by observing the connection state.
# 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:openbsd:openssh";
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.150638");
script_version("2021-05-28T11:51:20+0000");
script_tag(name:"last_modification", value:"2021-05-28 11:51:20 +0000 (Fri, 28 May 2021)");
script_tag(name:"creation_date", value:"2021-05-27 14:42:43 +0000 (Thu, 27 May 2021)");
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_cve_id("CVE-2004-2760");
script_tag(name:"qod_type", value:"remote_banner_unreliable");
script_tag(name:"solution_type", value:"VendorFix");
script_name("OpenSSH 3.5p1 Configuration Vulnerability");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
script_family("General");
script_dependencies("gb_openssh_consolidation.nasl");
script_mandatory_keys("openssh/detected");
script_tag(name:"summary", value:"sshd in OpenSSH 3.5p1, when PermitRootLogin is disabled,
immediately closes the TCP connection after a root login attempt with the correct password, but
leaves the connection open after an attempt with an incorrect password, which makes it easier for
remote attackers to guess the password by observing the connection state.");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"insight", value:"Please see the references for more information on the vulnerabilities.");
script_tag(name:"affected", value:"OpenSSH version 3.5p1.");
script_tag(name:"solution", value:"Update to version 3.6 or later.");
script_xref(name:"URL", value:"https://cxsecurity.com/issue/WLB-2008080108");
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"];
if( version_is_equal( version:vers, test_version:"3.5p1" ) ) {
report = report_fixed_ver( installed_version:vers, fixed_version:"3.6", install_path:path );
security_message( port:port, data:report );
exit( 0 );
}
exit( 99 );