[Mono-list] Announcement: New application-level x86 virtual
dinis.mono.projects at googlemail.com
Thu Dec 22 19:20:27 EST 2005
Hello Bryan, this project sounds indeed very interesting.
If I understood it correctly, your objective is to build a Sandbox for
unmanaged code (i.e. C++ code or Full Trust .Net Code) so that it can be
securely executed in the process hosting the VX32?
In that case, and knowing that all I need to take ownership of a process is
to be able to write to 4 bytes in that memory space (i.e. a pointer), how do
you securely handle the C++ native pointer manipulation without implementing
a C# like type safety environment.
I haven't read the main Pdf liked from your website, if this answer is
there, then please kindly point me to the relevant page.
Owasp .Net Project
On 12/22/05, Bryan Ford <baford at mit.edu> wrote:
> Hi folks, I hope this announcement might be of interest to some of you as
> being related to and in some respects complementary to Mono and other
> application-level virtual machines.
> I've just released the first (very experimental) version of VX32, a new
> x86-based application-level virtual environment. Unlike most x86-based
> machines such as QEMU and plex86, VX32 is more comparable in
> function to Kaffe or Mono: VX32 only implements the user-mode portion of
> x86 architecture rather than emulating a whole machine including devices,
> is intended for use by applications to create lightweight, highly
> controllable execution environments for safe application plug-ins and the
> like, rather than for running whole operating systems. VX32 might be
> especially appropriate for safely running Unix filter-like applications
> as compressors, decompressors, crypto software, or transcoders, where the
> legacy code bases you often want to re-use are already written in C or
> non-typesafe languages. VX32 could also potentially provide the basis for
> "safe native method" extension facility for typesafe languages such as
> and C#, if there is interest.
> VX32 uses dynamic code rewriting techniques to sandbox guest code
> on x86 host processors, typically costing less than 15% slowdown versus
> native x86-32 execution. I'm also working on instruction set emulation and
> binary translation to make the environment portable to other host
> The VX32 home page, including the first source release, is here:
> The home page for VXA (Virtual eXecutable Archives), a related project
> uses VX32 to turn ZIP files into "active archvies", is here:
> Finally, a paper that discusses both VX32 and VXA can be found here:
> I would appreciate any comments and feedback. Thanks for your time!
> Mono-list maillist - Mono-list at lists.ximian.com
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