POP Peeper 3.4.0.0 Date Remote Buffer Overflow Vulnerability Mar 12 2009 04:14AM
Krakow Labs (krakowlabs gmail com)
KL0309ADV-poppeeper_date-bof.txt
03.12.2009

Krakow Labs Research [www.krakowlabs.com]
POP Peeper 3.4.0.0 Date Remote Buffer Overflow Vulnerability

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======================
BACKGROUND INFORMATION
======================

"POP Peeper is an email notifier that runs in your Windows task bar and
alerts you when you have new email on your POP3, IMAP (with IDLE
support), Hotmail\MSN\LiveMail, Yahoo, GMail, Mail.com, MyWay, Excite,
iWon, Lycos.com, RediffMail, Juno and NetZero accounts. IMAP supports
allows you to access AOL, AIM, Netscape and other services. Send mail
directly from POP Peeper and use the address book to email your
frequently used contacts. POP Peeper allows you to view messages using
HTML or you can choose to safely view all messages in rich or plain
text. Several options are available that will decrease or eliminate the
risks of reading your email (viruses, javascript, webbugs, etc). POP
Peeper can be run from a portable device and can be password protected.
Many notification options are availble to indicate when new mail has
arrived, such as sound alerts (configurable for each account), flashing
scroll lock, skinnable popup notifier, customized screensaver and more."

Source: http://www.poppeeper.org

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VULNERABILITY DESCRIPTION
=========================

POP Peeper is vulnerable to a remote buffer overflow vulnerability. This
vulnerability is exploitable on the client side. A vulnerable POP Peeper
user must connect to an exploitation server and retrieve mail to be
affected.

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TECHNICAL DETAILS
=================

To trigger this vulnerability, POP Peeper has to connect to an
exploitation server acting as a POP3 daemon. The exploitation server can
send an oversized "Date" header (292 bytes) along with an email message,
overflowing a buffer on the stack, giving the attacker complete control
over the process. Other headers may also be affected.

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=================
PRODUCTS AFFECTED
=================

POP Peeper 3.4.0.0 was confirmed vulnerable. All versions of below
3.4.0.0 and are suspected vulnerable as well.

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============
EXPLOITATION
============

An exploit has been made public to trigger this vulnerability.

http://www.krakowlabs.com/dev/exp/KL0309EXP-poppeeper_date-bof.pl.txt

The exploit code has been tested in the following environment(s):

Windows XP Professional with Service Pack 3 on x86 Architecture

Result: SUCCESS

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WORKAROUNDS
===========

The vendor has fixed this vulnerability but has not issued an updated
version at the time of this advisory. We suggest POP Peeper users do not
connect to untrusted POP3 servers until a new release is available that
remedies this vulnerability.

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=======
CREDITS
=======

rush@KL (Jeremy Brown) [rush (at) krakowlabs (dot) com [email concealed]] is credited with the
discovery and research of this vulnerability.
rush@KL (Jeremy Brown) [rush (at) krakowlabs (dot) com [email concealed]] is credited with the
development of exploit code for this vulnerability.

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==========
DISCLAIMER
==========

Krakow Labs assumes no liability for the use or misuse of any or all
information contained in this document or information available at or
referring to this document. Any or all information contained in this
document or available at or referring to this document is not misleading
and all information provided by Krakow Labs in this document is accurate
to the best knowledge of Krakow Labs. This document can be published
and/or reproduced as long as the document's data is left unchanged.
Krakow Labs may be accessed via krakowlabs.com for more information,
personal reference, or other agendas supporting Krakow Labs.

Associated Files & Information:
http://www.krakowlabs.com/res/adv/KL0309ADV-poppeeper_date-bof.txt
http://www.krakowlabs.com/dev/exp/KL0309EXP-poppeeper_date-bof.pl.txt
http://www.krakowlabs.com/dev/exp/KL0309EXP-poppeeper_date-bof.jpeg
KL0309ADV-poppeeper_date-bof.txt

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