BannerFarm XSS vuln.

BannerFarm XSS vuln.

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Vuln. discovered by : r0t
Date: 19 april 2006
vendor:www.perlcoders.com/main/scripts.html?script=BannerFarm
affected versions:2.3 and previous
orginal advisory:
http://pridels.blogspot.com/2006/04/bannerfarm-xss-vuln.html
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Vuln. Description:

BannerFarm contains a flaw that allows a remote cross site scripting attack.
This flaw exists because input passed to "aff","cat" paremeter in "
banners.cgi" isn't properly sanitised before being returned to the user.
This could allow a user to create a specially crafted URL that would execute
arbitrary code in a user's browser within the trust relationship between the
browser and the server, leading to a loss of integrity.

examples:

/banners.cgi?aff=[XSS]
/banners.cgi?aff=&cat=[XSS]

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Solution:
Edit the source code to ensure that input is properly sanitised.
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More information @ unsecured-systems.com/forum/