Grub2 Authentication Bypass (FS#47386).
- Lock grub-extras revision to fix build failure (FS#46165).
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@ -0,0 +1,47 @@
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From e16eeda1200deabd0d3a4af968d526d62845a85f Mon Sep 17 00:00:00 2001
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From: Hector Marco-Gisbert <hecmargi@upv.es>
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Date: Fri, 13 Nov 2015 16:21:09 +0100
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Subject: [PATCH] Fix security issue when reading username and password
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This patch fixes two integer underflows at:
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* grub-core/lib/crypto.c
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* grub-core/normal/auth.c
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Resolves: CVE-2015-8370
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Signed-off-by: Hector Marco-Gisbert <hecmargi@upv.es>
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Signed-off-by: Ismael Ripoll-Ripoll <iripoll@disca.upv.es>
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---
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grub-core/lib/crypto.c | 2 +-
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grub-core/normal/auth.c | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/grub-core/lib/crypto.c b/grub-core/lib/crypto.c
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index 010e550..524a3d8 100644
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--- a/grub-core/lib/crypto.c
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+++ b/grub-core/lib/crypto.c
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@@ -468,7 +468,7 @@ grub_password_get (char buf[], unsigned buf_size)
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break;
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}
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- if (key == '\b')
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+ if (key == '\b' && cur_len)
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{
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cur_len--;
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continue;
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diff --git a/grub-core/normal/auth.c b/grub-core/normal/auth.c
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index c6bd96e..5782ec5 100644
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--- a/grub-core/normal/auth.c
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+++ b/grub-core/normal/auth.c
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@@ -172,7 +172,7 @@ grub_username_get (char buf[], unsigned buf_size)
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break;
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}
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- if (key == '\b')
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+ if (key == '\b' && cur_len)
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{
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cur_len--;
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grub_printf ("\b");
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--
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2.6.4
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16
PKGBUILD
16
PKGBUILD
@ -10,6 +10,7 @@ _GRUB_EMU_BUILD="0"
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_pkgver="2.02"
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_GRUB_GIT_TAG="grub-2.02-beta2"
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_GRUB_EXTRAS_COMMIT=4a56e2c2cc3d78f12f1788c27669a651071dee49
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_UNIFONT_VER="6.3.20131217"
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@ -22,8 +23,8 @@ _UNIFONT_VER="6.3.20131217"
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pkgname="grub"
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pkgdesc="GNU GRand Unified Bootloader (2)"
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pkgver=2.02.beta2
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pkgrel=5
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epoch="1"
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pkgrel=6
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epoch=1
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url="https://www.gnu.org/software/grub/"
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arch=('x86_64' 'i686')
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license=('GPL3')
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@ -53,11 +54,12 @@ if [[ "${_GRUB_EMU_BUILD}" == "1" ]]; then
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fi
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source=("grub-${_pkgver}::git+git://git.sv.gnu.org/grub.git#tag=${_GRUB_GIT_TAG}"
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"grub-extras::git+git://git.sv.gnu.org/grub-extras.git#branch=master"
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"grub-extras::git+git://git.sv.gnu.org/grub-extras.git#commit=${_GRUB_EXTRAS_COMMIT}"
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"http://ftp.gnu.org/gnu/unifont/unifont-${_UNIFONT_VER}/unifont-${_UNIFONT_VER}.bdf.gz"
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"http://ftp.gnu.org/gnu/unifont/unifont-${_UNIFONT_VER}/unifont-${_UNIFONT_VER}.bdf.gz.sig"
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'0001-Fix-security-issue-when-reading-username-and-passwor.patch'
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'grub-10_linux-detect-archlinux-initramfs.patch'
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'grub-intel-ucode.patch'
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'grub-intel-ucode.patch'
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'grub-add-GRUB_COLOR_variables.patch'
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'60_memtest86+'
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'grub.default'
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@ -67,8 +69,9 @@ md5sums=('SKIP'
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'SKIP'
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'728b7439ac733a7c0d56049adec364c7'
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'SKIP'
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'9589ec46a04f9bb4d5da987340a4a324'
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'945527e0de8d384166a4cf23439ae9ee'
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'a678629bc82c4e70c48d28242036d1d7'
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'a678629bc82c4e70c48d28242036d1d7'
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'e506ae4a9f9f7d1b765febfa84e10d48'
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'be55eabc102f2c60b38ed35c203686d6'
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'a03ffd56324520393bf574cefccb893d'
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@ -83,6 +86,9 @@ _pkgver() {
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prepare() {
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cd "${srcdir}/grub-${_pkgver}/"
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# CVE-2015-8370
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patch -Np1 -i ../0001-Fix-security-issue-when-reading-username-and-passwor.patch
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msg "Patch to load Intel microcode"
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patch -Np1 -i "${srcdir}/grub-intel-ucode.patch"
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