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qemu: fix CVE-2020-10702 & CVE-2020-13765

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(From OE-Core rev: 684307688eb0c1a98be8885164ecc8f578a36cf8)

Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Lee Chee Yang
2020-06-16 16:21:42 +08:00
committed by Richard Purdie
parent 09d29eb36a
commit 4e90fb17b1
3 changed files with 102 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
meta/recipes-devtools/qemu/qemu.inc
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@@ -37,6 +37,8 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://CVE-2020-7039-3.patch \
file://CVE-2020-7211.patch \
file://CVE-2020-11869.patch \
file://CVE-2020-13765.patch \
file://CVE-2020-10702.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"

52
meta/recipes-devtools/qemu/qemu/CVE-2020-10702.patch Normal file
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@@ -0,0 +1,52 @@
From de0b1bae6461f67243282555475f88b2384a1eb9 Mon Sep 17 00:00:00 2001
From: Vincent Dehors <vincent.dehors@smile.fr>
Date: Thu, 23 Jan 2020 15:22:38 +0000
Subject: [PATCH] target/arm: Fix PAuth sbox functions
In the PAC computation, sbox was applied over wrong bits.
As this is a 4-bit sbox, bit index should be incremented by 4 instead of 16.
Test vector from QARMA paper (https://eprint.iacr.org/2016/444.pdf) was
used to verify one computation of the pauth_computepac() function which
uses sbox2.
Launchpad: https://bugs.launchpad.net/bugs/1859713
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Vincent DEHORS <vincent.dehors@smile.fr>
Signed-off-by: Adrien GRASSEIN <adrien.grassein@smile.fr>
Message-id: 20200116230809.19078-2-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=patch;h=de0b1bae6461f67243282555475f88b2384a1eb9]
CVE: CVE-2020-10702
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
---
target/arm/pauth_helper.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/arm/pauth_helper.c b/target/arm/pauth_helper.c
index d3194f2..0a5f41e 100644
--- a/target/arm/pauth_helper.c
+++ b/target/arm/pauth_helper.c
@@ -89,7 +89,7 @@ static uint64_t pac_sub(uint64_t i)
uint64_t o = 0;
int b;
- for (b = 0; b < 64; b += 16) {
+ for (b = 0; b < 64; b += 4) {
o |= (uint64_t)sub[(i >> b) & 0xf] << b;
}
return o;
@@ -104,7 +104,7 @@ static uint64_t pac_inv_sub(uint64_t i)
uint64_t o = 0;
int b;
- for (b = 0; b < 64; b += 16) {
+ for (b = 0; b < 64; b += 4) {
o |= (uint64_t)inv_sub[(i >> b) & 0xf] << b;
}
return o;
--
1.8.3.1

48
meta/recipes-devtools/qemu/qemu/CVE-2020-13765.patch Normal file
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@@ -0,0 +1,48 @@
From e423455c4f23a1a828901c78fe6d03b7dde79319 Mon Sep 17 00:00:00 2001
From: Thomas Huth <thuth@redhat.com>
Date: Wed, 25 Sep 2019 14:16:43 +0200
Subject: [PATCH] hw/core/loader: Fix possible crash in rom_copy()
Both, "rom->addr" and "addr" are derived from the binary image
that can be loaded with the "-kernel" paramer. The code in
rom_copy() then calculates:
d = dest + (rom->addr - addr);
and uses "d" as destination in a memcpy() some lines later. Now with
bad kernel images, it is possible that rom->addr is smaller than addr,
thus "rom->addr - addr" gets negative and the memcpy() then tries to
copy contents from the image to a bad memory location. This could
maybe be used to inject code from a kernel image into the QEMU binary,
so we better fix it with an additional sanity check here.
Cc: qemu-stable@nongnu.org
Reported-by: Guangming Liu
Buglink: https://bugs.launchpad.net/qemu/+bug/1844635
Message-Id: <20190925130331.27825-1-thuth@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=patch;h=e423455c4f23a1a828901c78fe6d03b7dde79319]
CVE: CVE-2020-13765
Signed-off-by: Lee Chee Yang <chee.yang.lee@intel.com>
---
hw/core/loader.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/core/loader.c b/hw/core/loader.c
index 0d60219..5099f27 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -1281,7 +1281,7 @@ int rom_copy(uint8_t *dest, hwaddr addr, size_t size)
if (rom->addr + rom->romsize < addr) {
continue;
}
- if (rom->addr > end) {
+ if (rom->addr > end || rom->addr < addr) {
break;
}
--
1.8.3.1