Ruby on Rails 'Safe Buffer' Cross-Site Scripting Vulnerability

# SPDX-FileCopyrightText: 2011 Greenbone AG
# 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-only

CPE = "cpe:/a:rubyonrails:rails";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.802115");
  script_version("2023-07-28T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-07-28 05:05:23 +0000 (Fri, 28 Jul 2023)");
  script_tag(name:"creation_date", value:"2011-07-13 17:31:13 +0200 (Wed, 13 Jul 2011)");
  script_cve_id("CVE-2011-2197");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
  script_name("Ruby on Rails 'Safe Buffer' Cross-Site Scripting Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_rails_consolidation.nasl");
  script_mandatory_keys("rails/detected");

  script_xref(name:"URL", value:"http://secunia.com/advisories/44789");
  script_xref(name:"URL", value:"http://weblog.rubyonrails.org/2011/6/8/potential-xss-vulnerability-in-ruby-on-rails-applications");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers to execute arbitrary HTML and
  script code in a user's browser session in the context of an affected site.");

  script_tag(name:"affected", value:"Ruby on Rails version 2.x before 2.3.12, 3.0.x before 3.0.8 and
  3.1.x before 3.1.0.rc2.");

  script_tag(name:"insight", value:"The flaw is due to certain methods not properly handling the
  'HTML safe' mark for strings, which can lead to improperly sanitised input being returned to the user.");

  script_tag(name:"solution", value:"Upgrade to Ruby on Rails version 2.3.12 or 3.0.8 or 3.1.0.rc2 or later. Apply the patch for Ruby on Rails versions 3.1.0.rc1, 3.0.7 and 2.3.11.");

  script_tag(name:"summary", value:"Ruby on Rails is prone to a cross-site scripting (XSS) vulnerability.");

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

  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 );

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

if(version_in_range( version: version, test_version: "2.0", test_version2: "2.3.11" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "2.3.12", install_path: location );
  security_message( data: report, port: port );
  exit( 0 );
}

if( version_in_range( version: version, test_version: "3.0", test_version2: "3.0.7" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version: "3.0.8", install_path: location );
  security_message( data: report, port: port );
  exit( 0 );
}

if( version_in_range( version: version, test_version: "3.1", test_version2: "3.1.0.rc1" ) ) {
  report = report_fixed_ver( installed_version: version, fixed_version:"3.1.0.rc2", install_path: location );
  security_message( data: report, port: port );
  exit( 0 );
}

exit( 99 );