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qemu: fix CVE-2019-3812

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(From OE-Core rev: 0135c0bf2a6cfd43c86d67ad0a0a2eaadc05cc47)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton
2019-03-21 12:31:29 +00:00
committed by Richard Purdie
parent 95661a102d
commit 49c2351f3a
2 changed files with 40 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
meta/recipes-devtools/qemu/qemu.inc
+1
View File
@@ -29,6 +29,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://0017-fix-CVE-2018-20126.patch \
file://0018-fix-CVE-2018-20191.patch \
file://0019-fix-CVE-2018-20216.patch \
file://CVE-2019-3812.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
meta/recipes-devtools/qemu/qemu/CVE-2019-3812.patch
+39
View File
@@ -0,0 +1,39 @@
QEMU, through version 2.10 and through version 3.1.0, is vulnerable to an
out-of-bounds read of up to 128 bytes in the hw/i2c/i2c-ddc.c:i2c_ddc()
function. A local attacker with permission to execute i2c commands could exploit
this to read stack memory of the qemu process on the host.
CVE: CVE-2019-3812
Upstream-Status: Backport
Signed-off-by: Ross Burton <ross.burton@intel.com>
From b05b267840515730dbf6753495d5b7bd8b04ad1c Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 8 Jan 2019 11:23:01 +0100
Subject: [PATCH] i2c-ddc: fix oob read
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Suggested-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Michael Hanselmann <public@hansmi.ch>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20190108102301.1957-1-kraxel@redhat.com
---
hw/i2c/i2c-ddc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/hw/i2c/i2c-ddc.c b/hw/i2c/i2c-ddc.c
index be34fe072cf..0a0367ff38f 100644
--- a/hw/i2c/i2c-ddc.c
+++ b/hw/i2c/i2c-ddc.c
@@ -56,7 +56,7 @@ static int i2c_ddc_rx(I2CSlave *i2c)
I2CDDCState *s = I2CDDC(i2c);
int value;
- value = s->edid_blob[s->reg];
+ value = s->edid_blob[s->reg % sizeof(s->edid_blob)];
s->reg++;
return value;
}