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forked from pool/grub2
grub2/0002-AUDIT-0-http-boot-tracker-bug.patch
Michael Chang 8ee92f5194 Accepting request 1105405 from home:michael-chang:grub:2.12rc1
- Implement NV index mode for TPM 2.0 key protector
  0001-protectors-Implement-NV-index.patch
- Fall back to passphrase mode when the key protector fails to
  unlock the disk
  0002-cryptodisk-Fallback-to-passphrase.patch
- Wipe out the cached key cleanly
  0003-cryptodisk-wipe-out-the-cached-keys-from-protectors.patch
- Make diskfiler to look up cryptodisk devices first
  0004-diskfilter-look-up-cryptodisk-devices-first.patch

- Version bump to 2.12~rc1
  * Added:
    - grub-2.12~rc1.tar.xz
  * Removed:
    - grub-2.06.tar.xz
  * Patch dropped merged by new version:
    - grub2-GRUB_CMDLINE_LINUX_RECOVERY-for-recovery-mode.patch
    - grub2-s390x-02-kexec-module-added-to-emu.patch
    - grub2-efi-chainloader-root.patch
    - grub2-Fix-incorrect-netmask-on-ppc64.patch
    - 0001-osdep-Introduce-include-grub-osdep-major.h-and-use-i.patch
    - 0002-osdep-linux-hostdisk-Use-stat-instead-of-udevadm-for.patch
    - 0002-net-read-bracketed-ipv6-addrs-and-port-numbers.patch
    - grub2-s390x-10-keep-network-at-kexec.patch
    - 0001-Fix-build-error-in-binutils-2.36.patch
    - 0001-emu-fix-executable-stack-marking.patch
    - 0046-squash-verifiers-Move-verifiers-API-to-kernel-image.patch
    - 0001-30_uefi-firmware-fix-printf-format-with-null-byte.patch
    - 0001-tpm-Pass-unknown-error-as-non-fatal-but-debug-print-.patch
    - 0001-Filter-out-POSIX-locale-for-translation.patch

OBS-URL: https://build.opensuse.org/request/show/1105405
OBS-URL: https://build.opensuse.org/package/show/Base:System/grub2?expand=0&rev=458
2023-08-24 03:25:56 +00:00

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Diff

From b5c3492f31a98f5ef0f9bec2c0665ad0b71ad5cb Mon Sep 17 00:00:00 2001
From: Sebastian Krahmer <krahmer@suse.com>
Date: Tue, 28 Nov 2017 17:24:38 +0800
Subject: [PATCH] AUDIT-0: http boot tracker bug
Fixing a memory leak in case of error, and a integer overflow, leading to a
heap overflow due to overly large chunk sizes.
We need to check against some maximum value, otherwise values like 0xffffffff
will eventually lead in the allocation functions to small sized buffers, since
the len is rounded up to the next reasonable alignment. The following memcpy
will then smash the heap, leading to RCE.
This is no big issue for pure http boot, since its going to execute an
untrusted kernel anyway, but it will break trusted boot scenarios, where only
signed code is allowed to be executed.
v2: Fix GCC 13 build failure (bsc#1201089)
Signed-off-by: Michael Chang <mchang@suse.com>
---
grub-core/net/efi/net.c | 4 +++-
grub-core/net/http.c | 5 ++++-
2 files changed, 7 insertions(+), 2 deletions(-)
--- a/grub-core/net/efi/net.c
+++ b/grub-core/net/efi/net.c
@@ -654,8 +654,10 @@
rd = efi_net_interface (read, file, chunk, sz);
- if (rd <= 0)
+ if (rd <= 0) {
+ grub_free (chunk);
return rd;
+ }
if (buf)
{
--- a/grub-core/net/http.c
+++ b/grub-core/net/http.c
@@ -31,7 +31,8 @@
enum
{
- HTTP_PORT = 80
+ HTTP_PORT = 80,
+ HTTP_MAX_CHUNK_SIZE = GRUB_INT_MAX
};
@@ -86,6 +87,8 @@
if (data->in_chunk_len == 2)
{
data->chunk_rem = grub_strtoul (ptr, 0, 16);
+ if (data->chunk_rem > HTTP_MAX_CHUNK_SIZE)
+ return GRUB_ERR_NET_PACKET_TOO_BIG;
grub_errno = GRUB_ERR_NONE;
if (data->chunk_rem == 0)
{