phpBB2 Showing users ip adresses
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Affected Program: phpBB2 version 2.0.0, 2.0.1, 2.0.3
(possibly earlier versions too, but not tested)
Vendor: http://www.phpbb.com
Vendor Status: not informed yet
Discovery Date: 9 oct 2002
Severity
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All users can see other user's IP adres.
Problem
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All users can see IP adresses of other users who use
an uploaded avatar.
The problem is caused by the way phpBB2 gives every
uploaded avatar a unique file name. The IP adres is
reavealed (HEX) at the first characters of the file name.
Example
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Filename of avatar: d094d8473ce3c4ad501ce.gif
d094d847 is the (HEX) IP adres: 208.148.216.71
Solutions
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* Administrator of phpBB2 can disable upload of avatars.
