[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 15 Jun 2020 17:02:05 -0600
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: oss-security <oss-security@...ts.openwall.com>, cve-assign@...re.org
Subject: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading
unsigned modules
Hi Mitre,
People are requesting a CVE to track this and are poking me to poke
you to assign one.
Jason
On Sun, Jun 14, 2020 at 12:30 AM Jason A. Donenfeld <Jason@...c4.com> wrote:
>
> Hey folks,
>
> I noticed that Ubuntu 18.04's 4.15 kernels forgot to protect
> efivar_ssdt with lockdown, making that a vector for disabling lockdown
> on an efi secure boot machine. I wrote a little PoC exploit to
> demonstrate these types of ACPI shenanigans:
>
> https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh
>
> The comment on the top has description of exploit strategy and such. I
> haven't yet looked into other kernels and distros that might be
> affected, though afaict, Canonical's kernel seems to deviate a lot
> from upstream.
>
> Jason
Powered by blists - more mailing lists
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.
