Elastic Kibana X-Pack CVE-2018-3819 Open Redirect Vulnerability - Linux

# SPDX-FileCopyrightText: 2018 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:elastic:x-pack";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.107286");
  script_version("2025-09-03T14:11:39+0000");
  script_cve_id("CVE-2018-3819");
  script_tag(name:"cvss_base", value:"5.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:N");
  script_tag(name:"last_modification", value:"2025-09-03 14:11:39 +0000 (Wed, 03 Sep 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-10-19 11:57:00 +0000 (Mon, 19 Oct 2020)");
  script_tag(name:"creation_date", value:"2018-02-05 12:32:42 +0100 (Mon, 05 Feb 2018)");
  script_name("Elastic Kibana X-Pack CVE-2018-3819 Open Redirect Vulnerability - Linux");
  script_copyright("Copyright (C) 2018 Greenbone AG");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_dependencies("gb_elastic_kibana_http_detect.nasl", "os_detection.nasl");
  script_mandatory_keys("elastic/kibana/x-pack/detected", "Host/runs_unixoide");

  script_xref(name:"URL", value:"https://www.elastic.co/community/security");

  script_tag(name:"summary", value:"Elastic Kibana with X-Pack is prone to an open redirect vulnerability.");

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

  script_tag(name:"insight", value:"The fix in Kibana for ESA-2017-23 was incomplete.
  With X-Pack security enabled, Kibana versions before 5.6.7 and 6.x before 6.1.3 have
  an open redirect vulnerability on the login page.");

  script_tag(name:"impact", value:"This vulnerability enables an attacker to craft a
  link that redirects to an arbitrary website.");

  script_tag(name:"affected", value:"Elastic Kibana versions before 5.6.7 and
  6.x before 6.1.3.");

  script_tag(name:"solution", value:"Update to 6.1.3 or 5.6.7.");

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

  exit(0);
}

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

if( ! port = get_app_port( cpe:CPE ) ) exit( 0 );
if( ! vers = get_app_version( cpe:CPE, port:port ) ) exit( 0 );

if( version_is_less( version:vers, test_version:"5.6.7" ) ) {
  fix  = "5.6.7";
  VULN = TRUE;
} else if( vers =~ "^6\." && version_is_less( version:vers, test_version:"6.1.3" ) ) {
  fix  = "6.1.3";
  VULN = TRUE;
}

if( VULN ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:fix );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );