eMule Plus Web Server detection

# SPDX-FileCopyrightText: 2004 A.Kaverin
# 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

# This script only checks if port 4711 is open and if it reports banner which contains string "eMule".
# Usually this port is used for Web Server by eMule client and eMulePlus (P2P software).
# This script has been tested on eMule 0.30e; 0.42 c,d,e,g; eMulePlus v.1 i,j,k.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.12233");
  script_version("2023-08-01T13:29:10+0000");
  script_tag(name:"last_modification", value:"2023-08-01 13:29:10 +0000 (Tue, 01 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_cve_id("CVE-2004-1892");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_name("eMule Plus Web Server detection");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2004 A.Kaverin");
  script_family("Peer-To-Peer File Sharing");
  script_dependencies("gb_get_http_banner.nasl");
  script_mandatory_keys("eMule/banner");
  script_require_ports(4711);

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

  script_tag(name:"solution", value:"Disable eMule Web Server or upgrade to a bug-fixed version
  (eMule 0.42e, eMulePlus 1k or later)");

  script_tag(name:"summary", value:"eMule Web Server works on this port. Some versions of this P2P client
  are vulnerable to a DecodeBase16 buffer overflow which would allow an attacker to execute arbitrary code.");

  script_tag(name:"vuldetect", value:"Note: This script only checks if port 4711 is open and if
  it reports banner which contains string eMule.");

  script_tag(name:"affected", value:"eMule 0.42a-d, eMule 0.30e, eMulePlus <1k");

  script_xref(name:"URL", value:"http://security.nnov.ru/search/news.asp?binid=3572");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/10039");

  exit(0);
}

include("http_func.inc");

port = 4711;
if(! get_port_state(port))
  exit(0);

banner = http_get_remote_headers(port:port);
if( banner && "eMule" >< banner ) {
  security_message(port:port);
  exit(0);
}

exit(99);