-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=============================================================================
=============================================================================
Mobipocket Reader version 6.2 Build 608 Buffer Overflow
Url: http://www.mobipocket.com/en/HomePage/default.asp?Language=EN
Author: shinnai
mail: shinnai[at]autistici[dot]org
site: http://shinnai.altervista.org/
This was written for educational purpose. Use it at your own risk.
Author will be not responsible for any damage.
Tested on:
Microsoft Windows 7 Professional
6.1.7601 Service Pack 1 build 7601
Info (http://en.wikipedia.org/wiki/Mobipocket):
Mobipocket SA is a French company incorporated in March 2000 which
produces Mobipocket Reader software, an E-Book reader for some PDAs,
phones and desktop operating systems.
The Mobipocket software package is free and consists of various
publishing and reading tools for PDA, Smartphones, cellular phones
and e-book devices (Symbian, Windows Mobile, Palm OS, webOS, Java ME,
BlackBerry, Psion, Kindle and iLiad).
Mobipocket.com was bought by Amazon.com in 2005.[1] Amazon's acquisition
was believed to be a result of Adobe Systems's announcement that it would
no longer sell its eBook packaging and serving software.[2]
An alpha release of the java-based version of the mobipocket reader was
made available for cellphones on June 30, 2008.[3] There is also a reader
for desktop computers running Microsoft Windows, which also works with
computers running Mac OS X and Linux using WINE.[4]
It has been widely reported that since Amazon's acquisition of Mobipocket,
software support, user support, and platform growth was ended. In December,
2011, it was reported that Amazon officially notified the book publishers
that it was ending support for Mobipocket.
RIP: Mobipocket 2000-2011, Mobipocket eBook Format Is Gone, et.al. The
status of Mobipocket DRM content previously purchased by users continues
to be unclear since currently no other ebook reader supports this propriety
DRM method.
PoC released as is, I have no time at the moment for further investigations
=============================================================================
=============================================================================
Crafting a .chm file is possible to cause a stack based buffer overflow. In
the case of this PoC, registers at the moment of crash are as follow.
EAX 0012F6B8
ECX 000002D5
EDX 000003E3
EBX 00000000
ESP 0012F6F4
EBP FFFFFFFF
ESI 04064A4C
EDI 094BDF98 UNICODE " p"
EIP 00F31941
CPU Stack
Address Value ASCII Comments
0012F6E8 00F31941 A
As you can see, the content of EIP is just the value of the stack address
at 0x0012F6E8
PoC: http://shinnai.altervista.org/exploits/mobi.rar
=============================================================================
=============================================================================
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (MingW32)
iQIcBAEBAgAGBQJPlQfOAAoJEJlK/ai8vywm97sQALN/vS0GxycfBedQXOtspa5s
c5wvRu615YEBnDhskWVQCJV/hUP1mRvN0fIn6x2a8VgCBSfoTTezDhSQe7ZKl7Ye
zilEVakWUzvqx8sHPmNby6Bg0FAL3QAaguXOSVbM+iQG2x033AkvAhp0Hel5KZRw
6UmbLBPtFgux7BcLCBDC02XydacSoRo3/2Mv5fR9qcyMuLOrD6X+cxvRAGNsOWtV
8w0jSJwXoKRAnD56MWV5fYqz2frtMhQFNU0QR1y78Q9uzLJ/nWs5g3TkLW7yYwcQ
kANjzMxLV3TZRcobmxZJvVdgHG0H+aUXcbqku0GUMqYk1rIX7Ry+96bvDjLw5qN0
7SEhRYqv/lsqOacUt563cCxPzEWS2tstWyUs1kZpT/ox0gA7EHi4TfVKt8P45Luf
jFT1qgla+CgAAM6yYuzixjhZD0fH22rL/1vgmJ50PdCkR8PPT49f9IFL+7XlskSn
vLbUbpkstJKTt4a7p4Ou1HNiK07QoQjzZnU/ejnlrlvLfevJMbNNQSIV9uVQjESZ
tj58BQxbcfzZ3gyjlHrZ1ECh7+f/X9GL6kdXAo2jLsNHcnD5fEeo73JUsJKpoMFx
ljN1upfItDblkD+I0ylzf7l2VFk+/Q8YHfWEpvdKw6k2X+lFSFPnnmJ7tLtZEjsc
m939C+muZ76HDSPRX3vt
=Fks2
-----END PGP SIGNATURE-----
