This has been committed years ago:
https://git.savannah.gnu.org/cgit/grub.git/commit/grub-core/lib/crypto.c?id=451d80e52d851432e109771bb8febafca7a5f1f2
Please contact whoever you got your GRUB from
On Fri, Oct 18, 2019 at 2:39 PM Javier Martinez Canillas
<javi...@redhat.com> wrote:
>
> From: Hector Marco-Gisbert <hecma...@upv.es>
>
> This patch fixes two integer underflows at:
> * grub-core/lib/crypto.c
> * grub-core/normal/auth.c
>
> Resolves: CVE-2015-8370
>
> Signed-off-by: Hector Marco-Gisbert <hecma...@upv.es>
> Signed-off-by: Ismael Ripoll-Ripoll <irip...@disca.upv.es>
> Signed-off-by: Javier Martinez Canillas <javi...@redhat.com>
> ---
>
> grub-core/lib/crypto.c | 2 +-
> grub-core/normal/auth.c | 2 +-
> 2 files changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/grub-core/lib/crypto.c b/grub-core/lib/crypto.c
> index ca334d5a40e..e6c78d16d39 100644
> --- a/grub-core/lib/crypto.c
> +++ b/grub-core/lib/crypto.c
> @@ -468,7 +468,7 @@ grub_password_get (char buf[], unsigned buf_size)
> break;
> }
>
> - if (key == '\b')
> + if (key == '\b' && cur_len)
> {
> if (cur_len)
> cur_len--;
> diff --git a/grub-core/normal/auth.c b/grub-core/normal/auth.c
> index 6be678c0de1..c35ce972473 100644
> --- a/grub-core/normal/auth.c
> +++ b/grub-core/normal/auth.c
> @@ -172,7 +172,7 @@ grub_username_get (char buf[], unsigned buf_size)
> break;
> }
>
> - if (key == GRUB_TERM_BACKSPACE)
> + if (key == GRUB_TERM_BACKSPACE && cur_len)
> {
> if (cur_len)
> {
> --
> 2.21.0
>
>
> _______________________________________________
> Grub-devel mailing list
> Grub-devel@gnu.org
> https://lists.gnu.org/mailman/listinfo/grub-devel
--
Regards
Vladimir 'phcoder' Serbinenko
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