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Grub2 Authentication Bypass (FS#47386).

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- Lock grub-extras revision to fix build failure (FS#46165).
This commit is contained in:
Evangelos Foutras 2015-12-15 15:59:37 +00:00
parent c4d6eac8fc
commit 25ca70055e
2 changed files with 58 additions and 5 deletions
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47
0001-Fix-security-issue-when-reading-username-and-passwor.patch Normal file
View File

@ -0,0 +1,47 @@
From e16eeda1200deabd0d3a4af968d526d62845a85f Mon Sep 17 00:00:00 2001
From: Hector Marco-Gisbert <hecmargi@upv.es>
Date: Fri, 13 Nov 2015 16:21:09 +0100
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
Resolves: CVE-2015-8370
Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
Signed-off-by: Ismael Ripoll-Ripoll <iripoll@disca.upv.es>
---
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 010e550..524a3d8 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)
{
cur_len--;
continue;
diff --git a/grub-core/normal/auth.c b/grub-core/normal/auth.c
index c6bd96e..5782ec5 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 == '\b')
+ if (key == '\b' && cur_len)
{
cur_len--;
grub_printf ("\b");
--
2.6.4

16
PKGBUILD
View File

@ -10,6 +10,7 @@ _GRUB_EMU_BUILD="0"
_pkgver="2.02"
_GRUB_GIT_TAG="grub-2.02-beta2"
_GRUB_EXTRAS_COMMIT=4a56e2c2cc3d78f12f1788c27669a651071dee49
_UNIFONT_VER="6.3.20131217"
@ -22,8 +23,8 @@ _UNIFONT_VER="6.3.20131217"
pkgname="grub"
pkgdesc="GNU GRand Unified Bootloader (2)"
pkgver=2.02.beta2
pkgrel=5
epoch="1"
pkgrel=6
epoch=1
url="https://www.gnu.org/software/grub/"
arch=('x86_64' 'i686')
license=('GPL3')
@ -53,11 +54,12 @@ if [[ "${_GRUB_EMU_BUILD}" == "1" ]]; then
fi
source=("grub-${_pkgver}::git+git://git.sv.gnu.org/grub.git#tag=${_GRUB_GIT_TAG}"
"grub-extras::git+git://git.sv.gnu.org/grub-extras.git#branch=master"
"grub-extras::git+git://git.sv.gnu.org/grub-extras.git#commit=${_GRUB_EXTRAS_COMMIT}"
"http://ftp.gnu.org/gnu/unifont/unifont-${_UNIFONT_VER}/unifont-${_UNIFONT_VER}.bdf.gz"
"http://ftp.gnu.org/gnu/unifont/unifont-${_UNIFONT_VER}/unifont-${_UNIFONT_VER}.bdf.gz.sig"
'0001-Fix-security-issue-when-reading-username-and-passwor.patch'
'grub-10_linux-detect-archlinux-initramfs.patch'
'grub-intel-ucode.patch'
'grub-intel-ucode.patch'
'grub-add-GRUB_COLOR_variables.patch'
'60_memtest86+'
'grub.default'
@ -67,8 +69,9 @@ md5sums=('SKIP'
'SKIP'
'728b7439ac733a7c0d56049adec364c7'
'SKIP'
'9589ec46a04f9bb4d5da987340a4a324'
'945527e0de8d384166a4cf23439ae9ee'
'a678629bc82c4e70c48d28242036d1d7'
'a678629bc82c4e70c48d28242036d1d7'
'e506ae4a9f9f7d1b765febfa84e10d48'
'be55eabc102f2c60b38ed35c203686d6'
'a03ffd56324520393bf574cefccb893d'
@ -84,6 +87,9 @@ prepare() {
cd "${srcdir}/grub-${_pkgver}/"
# CVE-2015-8370
patch -Np1 -i ../0001-Fix-security-issue-when-reading-username-and-passwor.patch
msg "Patch to load Intel microcode"
patch -Np1 -i "${srcdir}/grub-intel-ucode.patch"
echo