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Date: Fri, 29 Sep 2023 14:29:17 -0400
From: Jeffrey Walton <>
Subject: Re: CVE-2023-5217: Heap buffer overflow in vp8
 encoding in libvpx

On Thu, Sep 28, 2023 at 5:10 PM Demi Marie Obenour
<> wrote:
> On Thu, Sep 28, 2023 at 11:37:23AM -0700, Alan Coopersmith wrote:
> > Google has announced another media parsing bug, this time correctly documenting
> > both the base library and Chrome versions affected in the CVE.
> >
> > states:
> >
> >    Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to
> >    117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially
> >    exploit heap corruption via a crafted HTML page.
> >    (Chromium security severity: High)
> >
> > Unfortunately, the bug report it points to is restricted access still:
> >
> >
> > But the Chrome release notes state:
> >    Google is aware that an exploit for CVE-2023-5217 exists in the wild.
> >
> >
> > Mozilla has put out their own security advisory at
> >
> > and delivered fixes in Firefox 118.0.1, Firefox ESR 115.3.1,
> > Firefox Focus for Android 118.1, and Firefox for Android 118.1.
> >
> > is also still
> > restricted access.
> >
> > It does not appear that libvpx 1.13.1 has been released yet, but there
> > are two commits in its git repo with the 1486441 bug id listed:
> >
> >
> >
> >
> > Mozilla's commit references these two libvpx commit ids as well:
> >
> How long will it take for corporations to accept that writing media
> codecs in C, C++, or any other memory-unsafe language is a fundamentally
> bad idea, and that it is better to rewrite the codecs in a safe language
> (such as Wuffs or Rust) than to try to secure the existing ones?

Small nit... Folks would lose a lot of platforms by selecting Rust.
Rust is only guaranteed to work on a handful of platforms. At this
time, it looks like it is i686 and x86_64. Confer,

And that's been my experience with Rust. For a new project I worked
on, Rust only worked on x86_64. It could not compile its own cargos on
armv7, aarch64 or powerpc. We had to (re)start a project from scratch
after that. And it got written in C, though we should have done it in
C++. We lost so much time due to Rust we did not have the cycles to
move from C to C++.


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