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SpagoBI 4.0 Cross Site Scripting / Shell Upload

SpagoBI 4.0 Cross Site Scripting / Shell Upload
Posted Mar 2, 2014
Authored by Christian Catalano

SpagoBI version 4.0 suffers from cross site scripting and arbitrary file upload vulnerabilities. The file upload issue could possibly lead to code execution.

tags | exploit, arbitrary, vulnerability, code execution, xss, file upload
advisories | CVE-2013-6234
SHA-256 | a473d04492ed0ca46728806a232c7a6ee98f70e5940464e4217b27d3d8c8a651

SpagoBI 4.0 Cross Site Scripting / Shell Upload

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01. ### Advisory Information ###

Title: XSS File Upload
Date published: 2014-03-01
Date of last update: 2014-03-01
Vendors contacted: Engineering Group
Discovered by: Christian Catalano
Severity: Medium


02. ### Vulnerability Information ###

CVE reference: CVE-2013-6234
CVSS v2 Base Score: 4
CVSS v2 Vector: (AV:N/AC:L/Au:S/C:N/I:P/A:N)
Component/s: SpagoBI
Class: Input Manipulation


03. ### Introduction ###

SpagoBI[1] is an Open Source Business Intelligence suite, belonging to
the free/open source SpagoWorld initiative, founded and supported by
Engineering Group[2].
It offers a large range of analytical functions, a highly functional
semantic layer often absent in other open source platforms and projects,
and a respectable set of advanced data visualization features including
geospatial analytics.
[3]SpagoBI is released under the Mozilla Public License, allowing its
commercial use. SpagoBI is hosted on OW2 Forge[4] managed by OW2
Consortium, an independent open-source software community.

[1] - http://www.spagobi.org
[2] - http://www.eng.it
[3] -
http://www.spagoworld.org/xwiki/bin/view/SpagoBI/PressRoom?id=SpagoBI-ForresterWave-July2012
[4] - http://forge.ow2.org/projects/spagobi


04. ### Vulnerability Description ###

SpagoBI contains a flaw that may allow a remote attacker to execute
arbitrary code. This flaw exists because the application does not
restrict uploading for specific file types from Worksheet designer
function.
This may allow a remote attacker to upload arbitrary files (e.g. .html
for XSS) that would execute arbitrary script code in a user's browser
within the trust relationship between their browser and the server or
more easily conduct more serious attacks.


05. ### Technical Description / Proof of Concept Code ###

An attacker (a SpagoBI malicious user with a restricted account) can
upload a file from Worksheet designer function.

To reproduce the vulnerability follow the provided information and
steps below:

- Using a browser log on to SpagoBI with restricted account (e.g.
Business User Account)
- Go on: Worksheet designer function
- Click on: Image and Choose image
- Upload malicious file and save it

XSS Malicious File Upload Attack has been successfully completed!

More details about SpagoBI Worksheet Engine and Worksheet designer
http://wiki.spagobi.org/xwiki/bin/view/spagobi_server/Worksheet#HWorksheetoverview

(e.g. Malicious File: xss.html)

<!DOCTYPE html>
<html>
<head>
<script>
function myFunction()
{alert("XSS");}
</script>
</head>
<body>
<input type="button" onclick="myFunction()" value="Show alert box">
</body>
</html>


06. ### Business Impact ###

Exploitation of the vulnerability requires low privileged application
user account but low or medium user interaction. Successful exploitation
of the vulnerability results in session hijacking, client-side phishing,
client-side external redirects or malware loads and client-side
manipulation of the vulnerable module context.


07. ### Systems Affected ###

This vulnerability was tested against: SpagoBI 4.0
Older versions are probably affected too, but they were not checked.


08. ### Vendor Information, Solutions and Workarounds ###

This issue is fixed in SpagoBI v4.1, which can be downloaded from:
http://forge.ow2.org/project/showfiles.php?group_id=204

Fixed by vendor [verified]


09. ### Credits ###

This vulnerability has been discovered by:
Christian Catalano aka wastasy ch(dot)catalano(at)gmail(dot)com


10. ### Vulnerability History ###

October 09th, 2013: Vulnerability identification
October 22th, 2013: Vendor notification to [SpagoBI Team]
November 05th, 2013: Vendor Response/Feedback from [SpagoBI Team]
December 16th, 2013: Vendor Fix/Patch [SpagoBI Team]
January 16th, 2014: Fix/Patch Verified
March 01st, 2014: Vulnerability disclosure


11. ### Disclaimer ###

The information contained within this advisory is supplied "as-is" with
no warranties or guarantees of fitness of use or otherwise.
I accept no responsibility for any damage caused by the use or misuse of
this information.

###################################################
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