F5 BIG-IP - SOL61570943 - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942

###############################################################################
# OpenVAS Vulnerability Test
#
# F5 BIG-IP - SOL61570943 - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942
#
# 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("1.3.6.1.4.1.25623.1.0.105550");
  script_cve_id("CVE-2015-7941", "CVE-2015-7942");
  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_version("2020-04-03T06:15:47+0000");

  script_name("F5 BIG-IP - SOL61570943 - libXML2 vulnerabilities CVE-2015-7941 and CVE-2015-7942");

  script_xref(name:"URL", value:"https://support.f5.com/kb/en-us/solutions/public/k/61/sol61570943.html");

  script_tag(name:"impact", value:"CVE-2015-7941libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.CVE-2015-7942The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"libxml2 2.9.2 does not properly stop parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and libxml2 crash) via crafted XML data to the (1) xmlParseEntityDecl or (2) xmlParseConditionalSections function in parser.c, as demonstrated by non-terminated entities.
The xmlParseConditionalSections function in parser.c in libxml2 does not properly skip intermediary entities when it stops parsing invalid input, which allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted XML data, a different vulnerability than CVE-2015-7941.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_tag(name:"summary", value:"The remote host is missing a security patch.");

  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:"2016-02-16 16:25:25 +0100 (Tue, 16 Feb 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',   '11.0.0-11.6.0;10.1.0-10.2.4;',
                              'unaffected', '12.0.0-12.1.0;' );

check_f5['AAM'] = make_array( 'affected',   '11.4.0-11.6.0;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['AFM'] = make_array( 'affected',   '11.3.0-11.6.0;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['AVR'] = make_array( 'affected',   '11.0.0-11.6.0;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['APM'] = make_array( 'affected',   '11.0.0-11.6.0;10.1.0-10.2.4;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['ASM'] = make_array( 'affected',   '11.0.0-11.6.0;10.1.0-10.2.4;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['LC'] = make_array( 'affected',   '11.0.0-11.6.0;10.1.0-10.2.4;',
                              'unaffected', '12.0.0-;12.1.0;' );

check_f5['PEM'] = make_array( 'affected',   '11.3.0-11.6.0;',
                              'unaffected', '12.0.0-;12.1.0;' );

if( report = f5_is_vulnerable( ca:check_f5, version:version ) ) {
  security_message( port:0, data:report );
  exit( 0 );
}

exit( 99 );