Ruby BigDecimal Library Denial of Service Vulnerability (Linux)

###############################################################################
# OpenVAS Vulnerability Test
#
# Ruby BigDecimal Library Denial of Service Vulnerability (Linux)
#
# Authors:
# Nikita MR <[email protected]>
#
# Copyright:
# Copyright (c) 2009 SecPod, http://www.secpod.com
#
# 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.
###############################################################################

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900570");
  script_version("2020-07-14T14:24:25+0000");
  script_tag(name:"last_modification", value:"2020-07-14 14:24:25 +0000 (Tue, 14 Jul 2020)");
  script_tag(name:"creation_date", value:"2009-06-23 10:30:45 +0200 (Tue, 23 Jun 2009)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_cve_id("CVE-2009-1904");
  script_bugtraq_id(35278);
  script_name("Ruby BigDecimal Library Denial of Service Vulnerability (Linux)");
  script_xref(name:"URL", value:"http://secunia.com/advisories/34135");
  script_xref(name:"URL", value:"http://www.ruby-lang.org/en/news/2009/06/09/dos-vulnerability-in-bigdecimal/");

  script_tag(name:"qod_type", value:"executable_version_unreliable");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 SecPod");
  script_family("Denial of Service");
  script_dependencies("gb_ruby_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("ruby/detected", "Host/runs_unixoide");

  script_tag(name:"impact", value:"Attackers can exploit this issue to crash an application using this library.");

  script_tag(name:"affected", value:"Ruby 1.8.6 to 1.8.6-p368 and 1.8.7 to 1.8.7-p172 on Linux.");

  script_tag(name:"insight", value:"The flaw is due to an error within the BigDecimal standard library
  when trying to convert BigDecimal objects into floating point numbers
  which leads to segmentation fault.");

  script_tag(name:"solution", value:"Upgrade to 1.8.6-p369 or 1.8.7-p174.");

  script_tag(name:"summary", value:"The host is installed with Ruby and is prone to denial of
  service  vulnerability.");

  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

CPE = "cpe:/a:ruby-lang:ruby";

include("host_details.inc");
include("version_func.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);

version = infos["version"];
location = infos["location"];

if(version_in_range(version:version, test_version:"1.8.6", test_version2:"1.8.6.367")) {
  report = report_fixed_ver(installed_version:version, fixed_version:"1.8.6-p369", install_path:location);
  security_message(data:report, port:port);
  exit(0);
}

if(version_in_range(version:version, test_version:"1.8.7", test_version2:"1.8.7.172")) {
  report = report_fixed_ver(installed_version:version, fixed_version:"1.8.7-p174", install_path:location);
  security_message(data:report, port:port);
  exit(0);
}

exit(99);