Microsoft Windows SMB2 Negotiation Protocol RCE Vulnerability

# SPDX-FileCopyrightText: 2009 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900965");
  script_version("2026-04-28T06:28:06+0000");
  script_tag(name:"last_modification", value:"2026-04-28 06:28:06 +0000 (Tue, 28 Apr 2026)");
  script_tag(name:"creation_date", value:"2009-10-15 12:43:47 +0200 (Thu, 15 Oct 2009)");
  script_cve_id("CVE-2009-2526", "CVE-2009-2532", "CVE-2009-3103");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_name("Microsoft Windows SMB2 Negotiation Protocol RCE Vulnerability");
  script_category(ACT_ATTACK);
  script_family("Windows : Microsoft Bulletins");
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_dependencies("os_detection.nasl");
  script_require_ports(139, 445);
  script_mandatory_keys("Host/runs_windows");

  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-050");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/36299");

  script_tag(name:"impact", value:"An attacker can exploit this issue to execute code with SYSTEM-level
  privileges. Failed exploit attempts will likely cause denial-of-service conditions.");

  script_tag(name:"affected", value:"- Microsoft Windows 7 RC

  - Microsoft Windows Vista

  - Microsoft Windows 2008 Server");

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - A denial of service vulnerability exists in the way that Microsoft Server
  Message Block (SMB) Protocol software handles specially crafted SMB version 2 (SMBv2) packets.

  - Unauthenticated remote code execution vulnerability exists in the way
  that Microsoft Server Message Block (SMB) Protocol software handles specially crafted SMB packets.");

  script_tag(name:"summary", value:"This host is missing a critical security update according to
  Microsoft Bulletin MS09-050.");

  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");

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

  exit(0);
}

include("smb_nt.inc");

port = kb_smb_transport();
if( ! port ) port = 445;
if( ! get_port_state( port ) ) exit( 0 );

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

data = raw_string( 0x00,0x00,0x00,0x90,0xff,0x53,0x4d,0x42,0x72,0x00,0x00,0x00,0x00,0x18,0x53,0xc8,
                   0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xfe,
                   0x00,0x00,0x00,0x00,0x00,0x6d,0x00,0x02,0x50,0x43,0x20,0x4e,0x45,0x54,0x57,0x4f,
                   0x52,0x4b,0x20,0x50,0x52,0x4f,0x47,0x52,0x41,0x4d,0x20,0x31,0x2e,0x30,0x00,0x02,
                   0x4c,0x41,0x4e,0x4d,0x41,0x4e,0x31,0x2e,0x30,0x00,0x02,0x57,0x69,0x6e,0x64,0x6f,
                   0x77,0x73,0x20,0x66,0x6f,0x72,0x20,0x57,0x6f,0x72,0x6b,0x67,0x72,0x6f,0x75,0x70,
                   0x73,0x20,0x33,0x2e,0x31,0x61,0x00,0x02,0x4c,0x4d,0x31,0x2e,0x32,0x58,0x30,0x30,
                   0x32,0x00,0x02,0x4c,0x41,0x4e,0x4d,0x41,0x4e,0x32,0x2e,0x31,0x00,0x02,0x4e,0x54,
                   0x20,0x4c,0x4d,0x20,0x30,0x2e,0x31,0x32,0x00,0x02,0x53,0x4d,0x42,0x20,0x32,0x2e,
                   0x30,0x30,0x32,0x00 );

send( socket:soc, data:data );
resp = smb_recv( socket:soc );
close( soc );
# '0xff' -> SMBv1 - Windows XP Professional, Version 202, SP3
# '0xff' -> SMBv1 - Samba 3.0.33
# '0xfe' -> SMBv2 - Windows Server@enterprise (2008), SP
#  After applying patch, strlen(resp) is > 77

if( resp ) {

  if( strlen( resp ) < 9 ) exit( 0 );

  if( ord( resp[4]) == 255 && ord( resp[5] ) == 83 && ord( resp[6] ) == 77 && ord( resp[7] ) == 66 &&
      ord( resp[8] ) == 114 && strlen( resp ) == 77 ) {
    security_message( port:port );
    exit( 0 );
  }
  exit( 99 );
}

exit( 0 );