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<td bgcolor="#FBDD4A" width="663" height="24" align="center">
<font color="#FFFFFF" face="Arial, Helvetica, sans-serif" size="4"><b>Exploit
– IIS Double Decoding Directory Traversal</b></font>
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<td width="1" rowspan="1013" background="../images/dotted_bar_vert.gif">
<img src="../images/1x1_spacer.gif" width="1" height="1" alt="">
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<font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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<p>
<font color="green" size="2"><i>11/28/2005</i></font><br>
<a href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2001-0333" target="cve"><font color="red" size="2">CVE-2001-0333</font></a><br>
<a href="http://www.securityfocus.com/bid/2708" target="cve"><font color="orange" size="2">BID-2708</font></a><br>
<a href="http://www.osvdb.org/556" target="cve"><font color="purple" size="2">OSVDB-556</font></a><br>
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</font>
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<a name="background.gif">
<img src="../images/background.gif" alt="Background:" width="159">
</a>
<br>
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">
</font>
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<a target="cve" href="http://www.microsoft.com/WindowsServer2003/iis/default.mspx">Microsoft IIS</a> is a web server for Windows platforms.
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<td valign="middle" colspan="3"><img src="../images/dotted_horiz_557.gif" width="557" height="6" alt="----------------------------------------"></td>
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<a name="the_problem.gif">
<img src="../images/the_problem.gif" alt="Problem:" width="159">
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Microsoft IIS 4.0 and 5.0 allow path validation checks to be
bypassed by URL-encoding invalid characters twice. Thus, a
backslash is first represented as %5c, and then %255c. This
allows remote attackers to access any executable file on the
system using a directory traversal attack from the /scripts
virtual directory, leading to command execution.
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</font>
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<td valign="middle" colspan="3"><img src="../images/dotted_horiz_557.gif" width="557" height="6" alt="----------------------------------------"></td>
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<a name="resolution.gif">
<img src="../images/resolution.gif" alt="Resolution:" width="159">
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Install the patch referenced in
<a target="cve" href="http://www.microsoft.com/technet/security/bulletin/MS01-026.mspx">Microsoft Security Bulletin 01-026</a>.
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</font>
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<td valign="middle" colspan="3"><img src="../images/dotted_horiz_557.gif" width="557" height="6" alt="----------------------------------------"></td>
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<td valign="top" width="159" align="right">
<a name="more_information.gif">
<img src="../images/more_information.gif" alt="More Information:" width="159">
</a>
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</font>
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<a href="http://archives.neohapsis.com/archives/bugtraq/2001-05/0101.html" target="cve">http://archives.neohapsis.com/archives/bugtraq/2001-05/0101.html</a><br>
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</font>
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<td width="6"> </td>
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<td width="7"> </td>
<td valign="middle" colspan="3"><img src="../images/dotted_horiz_557.gif" width="557" height="6" alt="----------------------------------------"></td>
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<td valign="top" width="159" align="right">
<a name="limitations.gif">
<img src="../images/limitations.gif" alt="Limitations:" width="159">
</a>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="2">
</font>
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Certain characters are disallowed when using this exploit to run commands.
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</font>
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<td width="159"> </td>
<td width="7"> </td>
<td valign="middle" colspan="3"><img src="../images/dotted_horiz_557.gif" width="557" height="6" alt="----------------------------------------"></td>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="2">
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<a href="exploit_run_form,,,,iis_double_decode.html"><img src="../images/run_now_button.gif" alt="Run Now" border="0"></a>
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