Citrix NetScaler Gateway Login Form Hijacking Vulnerability (CTX213313)

# SPDX-FileCopyrightText: 2016 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:citrix:netscaler";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105738");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2016-05-30 12:38:48 +0200 (Mon, 30 May 2016)");
  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_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:"2018-10-09 20:00:00 +0000 (Tue, 09 Oct 2018)");

  script_cve_id("CVE-2016-4945");

  script_tag(name:"qod_type", value:"remote_banner");

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

  script_name("Citrix NetScaler Gateway Login Form Hijacking Vulnerability (CTX213313)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("General");
  script_dependencies("gb_citrix_netscaler_consolidation.nasl");
  script_mandatory_keys("citrix/netscaler/detected");

  script_tag(name:"summary", value:"Citrix NetScaler is prone to a login form hijacking
  vulnerability.");

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

  script_tag(name:"impact", value:"An attacker may hijack form values in a NetScaler Gateway login
  form via cookie tampering resulting in stolen user credentials.");

  script_tag(name:"affected", value:"Citrix NetScaler version 11.0 earlier than 11.0 Build 66.11.");

  script_tag(name:"solution", value:"Update to version 11.0 Build 66.11 or later.");

  script_xref(name:"URL", value:"https://support.citrix.com/article/CTX213313");

  exit(0);
}

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

if( ! vers = get_app_version( cpe:CPE, nofork: TRUE ) )
  exit( 0 );

if( version_in_range( version:vers, test_version:"11", test_version2:"11.0.66.10" ) )
  fix = "11.0 build 66.11";

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

exit( 99 );