WebLogic Server /%00/ bug

# SPDX-FileCopyrightText: 2001 StrongHoldNet
# 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:oracle:weblogic_server";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.10698");
  script_version("2023-08-03T05:05:16+0000");
  script_tag(name:"last_modification", value:"2023-08-03 05:05:16 +0000 (Thu, 03 Aug 2023)");
  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:P/I:N/A:N");

  script_name("WebLogic Server /%00/ bug");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2001 StrongHoldNet");
  script_family("Web Servers");
  script_dependencies("gb_oracle_weblogic_consolidation.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("oracle/weblogic/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/2513");

  script_tag(name:"solution", value:"Upgrade to WebLogic 6.0 with Service Pack 1.");

  script_tag(name:"summary", value:"Requesting a URL with '%00', '%2e', '%2f' or '%5c' appended to it
  makes some WebLogic servers dump the listing of the page directory, thus showing potentially sensitive files.");

  script_tag(name:"impact", value:"An attacker may also use this flaw to view
  the source code of JSP files, or other dynamic content.");

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

  exit(0);
}

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

function http_getdirlist(itemstr, port) {

  buffer = http_get(item:itemstr, port:port);
  rbuf = http_keepalive_send_recv(port:port, data:buffer);
  if(!rbuf)
    return;

  data = tolower(rbuf);
  if(("directory listing of" >< data) || ("index of" >< data)) {
    if(strlen(itemstr) > 1) {
      report = http_report_vuln_url(port:port, url:itemstr);
      security_message(port:port, data:report);
    } else if(strlen(itemstr) == 1) { # If itemstr = / we exit the test to avoid FP.
      exit(0);
    }
  }
}

if(!port = get_app_port(cpe: CPE, service: "www"))
  exit(0);

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

http_getdirlist(itemstr:"/", port:port); # Anti FP
http_getdirlist(itemstr:"/%2e/", port:port);
http_getdirlist(itemstr:"/%2f/", port:port);
http_getdirlist(itemstr:"/%5c/", port:port);
http_getdirlist(itemstr:"/%00/", port:port);