Microsoft Windows WINS Remote Code Execution Vulnerability (2524426)

# SPDX-FileCopyrightText: 2011 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("1.3.6.1.4.1.25623.1.0.802260");
  script_version("2023-07-28T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-07-28 05:05:23 +0000 (Fri, 28 Jul 2023)");
  script_tag(name:"creation_date", value:"2011-10-21 16:31:29 +0200 (Fri, 21 Oct 2011)");
  script_cve_id("CVE-2011-1248");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_name("Microsoft Windows WINS Remote Code Execution Vulnerability (2524426)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Windows : Microsoft Bulletins");
  script_dependencies("find_service.nasl", "os_detection.nasl");
  script_require_ports(42);
  script_mandatory_keys("Host/runs_windows");

  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/67100");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/47730");
  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/17830/");
  script_xref(name:"URL", value:"http://www.zerodayinitiative.com/advisories/ZDI-11-167/");
  script_xref(name:"URL", value:"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-035");

  script_tag(name:"impact", value:"Successful exploitation could allow remote attackers to execute arbitrary
  code with elevated privileges or cause a denial-of-service condition.");
  script_tag(name:"affected", value:"- Microsoft Windows 2K3 Service Pack 2 and prior

  - Microsoft Windows Server 2008 Service Pack 2 and prior");
  script_tag(name:"insight", value:"The flaw is caused by a logic error in the Windows Internet Name Service
  (WINS) when handling a socket send exception, which could cause certain user
  supplied values to remain within a stack frame and to be reused in another
  context, leading to arbitrary code execution with elevated privileges.");
  script_tag(name:"solution", value:"The vendor has released updates. Please see the references for more information.");
  script_tag(name:"summary", value:"This host is missing a critical security update according to
  Microsoft Bulletin MS11-035.");

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

  exit(0);
}

include("host_details.inc");
include("byte_func.inc");

## WINS Port
port = 42;
if(!get_port_state(port)){
 exit(0);
}

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

## Association Start Request Message
start_assoc = mkdword(0x00007800) + ## Opcode
              mkdword(0x00000000) + ## Destination Association Handle
              mkdword(0x00000000) + ## Message_Type: WREPL_START_ASSOCIATION
              mkdword(0x00000042) + ## Sender Association Handle
              mkword(0x0002) +      ## minor version
              mkword(0x0005);       ## major version

## Add Proper Padding
req = start_assoc + crap(length: 0x15);  ## Padding
req = mkdword(strlen(req)) + req;   ## Length = 41

## Send Normal Request
send(socket:soc, data:req);

## Receive Association Start Response Message
res = recv(socket:soc, length:1024);
if(!res) {
  exit(0);
}

assoc_ctx =  getdword(blob:res, pos:8);
if(assoc_ctx != 0x00000042){
  exit(0);
}

## Association Stop Request Message
stop_assoc = mkdword(0x00007800) + ## Opcode
             mkdword(0x00000040) + ## Destination Association Handle
             mkdword(0x00000002) + ## Message_Type: WREPL_STOP_ASSOCIATION
             mkdword(0x00000000) + ## Association Stop Reason (Normal)
             crap(length:0x18);    ## padding

## Packet Length = 40
stop_assoc = mkdword(strlen(stop_assoc)) + stop_assoc;

## Sending Association Stop Request Message
send(socket:soc, data:stop_assoc);
close(soc);

soc1 = open_sock_tcp(port);
if(!soc1){
  exit(0);
}

## Send a request without padding to check whether the server is patched or not.
req1 = mkdword(strlen(start_assoc)) + start_assoc;
send(socket:soc1, data:req1);
res = recv(socket:soc1, length:1024);

## Patched server checks for padding and does not respond.
if(res)
{
  ## Response From Unpatched Server
  security_message(port);
  ## Sending Association Stop Request Message
  send(socket:soc1, data:stop_assoc);
}
close(soc1);