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grub: Security fix CVE-2015-8370

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CVE-2015-8370 grub2: buffer overflow when checking password entered during bootup

(From OE-Core rev: b63e3b57b47e95003a1fb014f90333c327681d5b)

Signed-off-by: Armin Kuster <akuster@mvista.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Armin Kuster
2016-01-31 07:46:32 -08:00
committed by Richard Purdie
parent 443b09a61d
commit 9a88c1d255
2 changed files with 60 additions and 0 deletions
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59
meta/recipes-bsp/grub/files/CVE-2015-8370.patch Normal file
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@@ -0,0 +1,59 @@
From 451d80e52d851432e109771bb8febafca7a5f1f2 Mon Sep 17 00:00:00 2001
From: Hector Marco-Gisbert <hecmargi@upv.es>
Date: Wed, 16 Dec 2015 07:57:18 +0300
Subject: [PATCH] Fix security issue when reading username and password
This patch fixes two integer underflows at:
* grub-core/lib/crypto.c
* grub-core/normal/auth.c
CVE-2015-8370
Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
Signed-off-by: Ismael Ripoll-Ripoll <iripoll@disca.upv.es>
Also-By: Andrey Borzenkov <arvidjaar@gmail.com>
Upstream-Status: Backport
http://git.savannah.gnu.org/cgit/grub.git/commit/?id=451d80e52d851432e109771bb8febafca7a5f1f2
CVE: CVE-2015-8370
Signed-off-by: Armin Kuster <akuster@mvista.com>
---
grub-core/lib/crypto.c | 3 ++-
grub-core/normal/auth.c | 7 +++++--
2 files changed, 7 insertions(+), 3 deletions(-)
Index: git/grub-core/lib/crypto.c
===================================================================
--- git.orig/grub-core/lib/crypto.c
+++ git/grub-core/lib/crypto.c
@@ -458,7 +458,8 @@ grub_password_get (char buf[], unsigned
if (key == '\b')
{
- cur_len--;
+ if (cur_len)
+ cur_len--;
continue;
}
Index: git/grub-core/normal/auth.c
===================================================================
--- git.orig/grub-core/normal/auth.c
+++ git/grub-core/normal/auth.c
@@ -174,8 +174,11 @@ grub_username_get (char buf[], unsigned
if (key == '\b')
{
- cur_len--;
- grub_printf ("\b");
+ if (cur_len)
+ {
+ cur_len--;
+ grub_printf ("\b");
+ }
continue;
}

1
meta/recipes-bsp/grub/grub2.inc
View File

@@ -27,6 +27,7 @@ SRC_URI = "ftp://ftp.gnu.org/gnu/grub/grub-${PV}.tar.gz \
file://0001-Unset-need_charset_alias-when-building-for-musl.patch \
file://0001-parse_dhcp_vendor-Add-missing-const-qualifiers.patch \
file://grub2-fix-initrd-size-bug.patch \
file://CVE-2015-8370.patch \
"
DEPENDS = "flex-native bison-native xz"