Citrix NetScaler Detection (HTTP)
🗓️ 24 Oct 2008 00:00:00Reported by Copyright (C) 2008 nnposterType 
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# SPDX-FileCopyrightText: 2008 nnposter
# SPDX-FileCopyrightText: New detection methods / pattern / code since 2009 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
if(description)
{
script_oid("1.3.6.1.4.1.25623.1.0.80024");
script_version("2025-07-08T05:41:10+0000");
script_tag(name:"last_modification", value:"2025-07-08 05:41:10 +0000 (Tue, 08 Jul 2025)");
script_tag(name:"creation_date", value:"2008-10-24 20:15:31 +0200 (Fri, 24 Oct 2008)");
script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:N");
script_tag(name:"cvss_base", value:"0.0");
script_tag(name:"qod_type", value:"remote_banner");
script_name("Citrix NetScaler Detection (HTTP)");
script_category(ACT_GATHER_INFO);
script_copyright("Copyright (C) 2008 nnposter");
script_family("Product detection");
script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
script_require_ports("Services/www", 443);
script_exclude_keys("Settings/disable_cgi_scanning");
script_tag(name:"summary", value:"HTTP based detection of Citrix NetScaler.");
exit(0);
}
include("host_details.inc");
include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
port = http_get_port(default: 443);
foreach url (make_list("/vpn/tmindex.html", "/vpn/index.html", "/", "/index.html", "/logon/LogonPoint/index.html", "/logon/LogonPoint/tmindex.html", "/logon/vpn/index-ext.html")) {
res = http_get_cache(port: port, item: url);
if (!res)
continue;
# <TITLE>Citrix Access Gateway - Enterprise Edition</TITLE>
# <TITLE>Citrix Access Gateway</TITLE>
# class="_ctxstxt_NetscalerGateway"
# class="_ctxstxt_NetscalerAAA"
# <table class="CTXMSAM_LogonFont">
# <title>Citrix Gateway</title>
# <title>NetScaler Gateway</title>
# <title>Netscaler Gateway</title>
#
# All on the same system:
# <title>Citrix Gateway</title>
# <body class="ns_body" id=bodyTag>
# <!-- Copyright 2001-2005 Citrix Systems, Inc. All Rights Reserved -->
# <script type="text/javascript" src="/vpn/nsshare.js?v=1884e7877a13a991b6d3fac01efbaf79"></script>
#
if ((res !~ "<title>Citrix Login</title>" || res !~ 'action="(/login/do_login|/ws/login\\.pl)"') &&
res !~ "<title>netscaler gateway</title>" &&
res !~ "citrix access gateway(\s*-\s*.* edition)?</title>" &&
res !~ "<title>Citrix Gateway</title>.+(ns_body|Citrix Systems, Inc\.|/vpn/nsshare\.js)" &&
'class="_ctxstxt_Netscaler' >!< res &&
'class="CTXMSAM_LogonFont">' >!< res)
continue;
set_kb_item(name: "citrix/netscaler/detected", value: TRUE);
set_kb_item(name: "citrix/netscaler/http/detected", value: TRUE);
set_kb_item(name: "citrix/netscaler/http/port", value: port);
set_kb_item(name: "citrix/netscaler/http/" + port + "/detectUrl",
value: http_report_vuln_url(port: port, url: url, url_only: TRUE));
version = "unknown";
url2 = "/epa/epa.html";
req = http_get(port: port, item: url2);
res = http_keepalive_send_recv(port: port, data: req, bodyonly: FALSE);
# var nsversion="12,0,41,23";
vers = eregmatch(pattern: 'var nsversion="([^;]+)";', string: res);
if (isnull(vers[1])) {
url2 = "/api/NSConfig.wsdl";
req = http_get(port: port, item: url2);
res = http_keepalive_send_recv(port: port, data: req, bodyonly: FALSE);
# <!-- #NS7.0 Build 56 -->
vers = eregmatch(pattern: "#NS([0-9.]+ Build [[0-9]+)", string: res);
}
if (!isnull(vers[1])) {
version = str_replace(string: vers[1], find: ",", replace: ".");
version = str_replace(string: version, find: " Build ", replace: ".");
set_kb_item(name: "citrix/netscaler/http/" + port + "/concluded", value: vers[0]);
set_kb_item(name: "citrix/netscaler/http/" + port + "/concUrl",
value: http_report_vuln_url(port: port, url: url2, url_only: TRUE));
}
set_kb_item(name: "citrix/netscaler/http/" + port + "/version", value: version);
exit(0);
}
exit(0);
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08 Jul 2025 00:00Current
7.3High risk
Vulners AI Score7.3