Roxen counter module

# SPDX-FileCopyrightText: 2000 Hendrik Scholz
# 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("1.3.6.1.4.1.25623.1.0.10207");
  script_version("2025-04-11T05:40:28+0000");
  script_tag(name:"last_modification", value:"2025-04-11 05:40:28 +0000 (Fri, 11 Apr 2025)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  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_name("Roxen counter module");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2000 Hendrik Scholz");
  script_family("Web application abuses");
  script_dependencies("gb_roxen_webserver_detect.nasl", "no404.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("roxen/webserver/detected");

  script_tag(name:"solution", value:"Disable the counter-module. There might be a patch available in the future.");

  script_tag(name:"summary", value:"The Roxen Challenger webserver is running and the counter module is installed.

  Requesting large counter GIFs eats up CPU-time on the server. If the server does not support threads this will
  prevent the server from serving other clients.");

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

  exit(0);
}

CPE = "cpe:/a:roxen:webserver";

include("host_details.inc");
include("http_func.inc");
include("http_404.inc");

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

if(!get_app_location(port:port, cpe:CPE, nofork:TRUE))
  exit(0);

host = http_host_name(dont_add_port:TRUE);

soc = http_open_socket(port);
if(!soc)
  exit(0);

no404 = http_get_no404_string(port:port, host:host);
no404 = tolower(no404);

url = string("/counter/1/n/n/0/3/5/0/a/123.gif");
data = http_get(item:url, port:port);

send(socket:soc, data:data);
line = recv_line(socket:soc, length:1024);
buf = http_recv(socket:soc);
buf = tolower(buf);
must_see = "image";
http_close_socket(soc);

if(no404 && no404 >< buf)
  exit(0);

if((" 200 " >< line) && (must_see >< buf)) {
  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);