oss-security - Re: CVE-2023-5217: Heap buffer overflow in vp8 encoding in libvpx

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230929202415.bmsmbdapaljl2pf2@mutt-hbsd>
Date: Fri, 29 Sep 2023 16:24:15 -0400
From: Shawn Webb <shawn.webb@...denedbsd.org>
To: oss-security@...ts.openwall.com
Subject: Re: CVE-2023-5217: Heap buffer overflow in vp8
 encoding in libvpx

On Thu, Sep 28, 2023 at 04:42:33PM -0400, 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.
> > 
> > https://www.cve.org/CVERecord?id=CVE-2023-5217 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:
> > https://crbug.com/1486441
> > 
> > But the Chrome release notes state:
> >    Google is aware that an exploit for CVE-2023-5217 exists in the wild.
> > https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_27.html
> > 
> > Mozilla has put out their own security advisory at
> > https://www.mozilla.org/en-US/security/advisories/mfsa2023-44/
> > 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.
> > 
> > https://bugzilla.mozilla.org/show_bug.cgi?id=1855550 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:
> > 
> > https://github.com/webmproject/libvpx/commit/3fbd1dca6a4d2dad332a2110d646e4ffef36d590
> > https://github.com/webmproject/libvpx/commit/af6dedd715f4307669366944cca6e0417b290282
> > 
> > Mozilla's commit references these two libvpx commit ids as well:
> > https://hg.mozilla.org/mozilla-central/rev/c53f5ef77b62b79af86951a7f9130e1896b695d2
> 
> 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?

$ git clone https://chromium.googlesource.com/webm/libvpx
$ cd libvpx
$ git log --reverse
commit 0ea50ce9cb4b65eee6afa1d041fe8beb5abda667 (tag: v0.9.0)
Author: John Koleszar <jkoleszar@...gle.com>
Date:   Tue May 18 11:58:33 2010 -0400

    Initial WebM release

I think this might predate Rust. I wonder how many technical folk
would welcome alternative implementations of various popular
libraries.

I especially am grateful for those who advocate for, and help advance,
software diversity.

Thanks,

-- 
Shawn Webb
Cofounder / Security Engineer
HardenedBSD

https://git.hardenedbsd.org/hardenedbsd/pubkeys/-/raw/master/Shawn_Webb/03A4CBEBB82EA5A67D9F3853FF2E67A277F8E1FA.pub.asc

Download attachment "signature.asc" of type "application/pgp-signature" (834 bytes)

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.