The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.
###############################################################################
# OpenVAS Vulnerability Test
#
# F5 BIG-IP - SOL31510510 - OpenSSH vulnerability CVE-2016-6515
#
# Authors:
# Michael Meyer <[email protected]>
#
# Copyright:
# Copyright (C) 2016 Greenbone Networks GmbH
#
# 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:/h:f5:big-ip";
if (description)
{
script_oid("1.3.6.1.4.1.25623.1.0.140012");
script_cve_id("CVE-2016-6515");
script_tag(name:"cvss_base", value:"7.8");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
script_version("2020-04-03T06:15:47+0000");
script_name("F5 BIG-IP - SOL31510510 - OpenSSH vulnerability CVE-2016-6515");
script_xref(name:"URL", value:"https://support.f5.com/kb/en-us/solutions/public/k/31/sol31510510.html");
script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");
script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");
script_tag(name:"summary", value:"The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.");
script_tag(name:"qod_type", value:"package");
script_tag(name:"solution_type", value:"VendorFix");
script_tag(name:"last_modification", value:"2020-04-03 06:15:47 +0000 (Fri, 03 Apr 2020)");
script_tag(name:"creation_date", value:"2016-10-24 15:29:10 +0200 (Mon, 24 Oct 2016)");
script_category(ACT_GATHER_INFO);
script_family("F5 Local Security Checks");
script_copyright("Copyright (C) 2016 Greenbone Networks GmbH");
script_dependencies("gb_f5_big_ip_version.nasl");
script_mandatory_keys("f5/big_ip/version", "f5/big_ip/active_modules");
exit(0);
}
include("version_func.inc");
include("host_details.inc");
include("list_array_func.inc");
include("f5.inc");
if( ! version = get_app_version( cpe:CPE ) )
exit( 0 );
check_f5['LTM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;10.2.1-10.2.4;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['AAM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['AFM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['AVR'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['APM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;10.2.1-10.2.4;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['ASM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;10.2.1-10.2.4;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['GTM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;10.2.1-10.2.4;',
'unaffected', '11.6.1_HF2;11.5.6;' );
check_f5['LC'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;11.2.1;10.2.1-10.2.4;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['PEM'] = make_array( 'affected', '11.6.0-11.6.1;11.4.0-11.5.5;',
'unaffected', '13.0.0;12.0.0-12.1.2;11.6.1_HF2;11.5.6;' );
check_f5['PSM'] = make_array( 'affected', '11.4.0-11.4.1;10.2.1-10.2.4;',
'unaffected', '' );
if( report = f5_is_vulnerable( ca:check_f5, version:version ) ) {
security_message( port:0, data:report );
exit( 0 );
}
exit( 99 );