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gnu: QEMU: Fix CVE-2018-16847 and CVE-2018-16867. 

* gnu/packages/patches/qemu-CVE-2018-16847.patch,
gnu/packages/patches/qemu-CVE-2018-16867.patch: New files.
* gnu/local.mk (dist_patch_DATA): Add them.
* gnu/packages/virtualization.scm (qemu)[source]: Use them.
This commit is contained in:
Leo Famulari 2018-12-06 15:12:51 -05:00
parent d553ee8082
commit e6c28113e6
No known key found for this signature in database
GPG Key ID: 2646FA30BACA7F08
4 changed files with 211 additions and 0 deletions
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2
gnu/local.mk
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@ -1111,6 +1111,8 @@ dist_patch_DATA = \
%D%/packages/patches/python-unittest2-remove-argparse.patch \
%D%/packages/patches/python-waitress-fix-tests.patch \
%D%/packages/patches/qemu-glibc-2.27.patch \
%D%/packages/patches/qemu-CVE-2018-16847.patch \
%D%/packages/patches/qemu-CVE-2018-16867.patch \
%D%/packages/patches/qt4-ldflags.patch \
%D%/packages/patches/qtbase-use-TZDIR.patch \
%D%/packages/patches/qtscript-disable-tests.patch \

158
gnu/packages/patches/qemu-CVE-2018-16847.patch Normal file
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@ -0,0 +1,158 @@
Fix CVE-2018-16847:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16847
Patch copied from upstream source repository:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=87ad860c622cc8f8916b5232bd8728c08f938fce
From 87ad860c622cc8f8916b5232bd8728c08f938fce Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 20 Nov 2018 19:41:48 +0100
Subject: [PATCH] nvme: fix out-of-bounds access to the CMB
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Because the CMB BAR has a min_access_size of 2, if you read the last
byte it will try to memcpy *2* bytes from n->cmbuf, causing an off-by-one
error. This is CVE-2018-16847.
Another way to fix this might be to register the CMB as a RAM memory
region, which would also be more efficient. However, that might be a
change for big-endian machines; I didn't think this through and I don't
know how real hardware works. Add a basic testcase for the CMB in case
somebody does this change later on.
Cc: Keith Busch <keith.busch@intel.com>
Cc: qemu-block@nongnu.org
Reported-by: Li Qiang <liq3ea@gmail.com>
Reviewed-by: Li Qiang <liq3ea@gmail.com>
Tested-by: Li Qiang <liq3ea@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
hw/block/nvme.c | 2 +-
tests/Makefile.include | 2 +-
tests/nvme-test.c | 68 +++++++++++++++++++++++++++++++++++-------
3 files changed, 60 insertions(+), 12 deletions(-)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 28d284346dd..8c35cab2b43 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -1201,7 +1201,7 @@ static const MemoryRegionOps nvme_cmb_ops = {
.write = nvme_cmb_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.impl = {
- .min_access_size = 2,
+ .min_access_size = 1,
.max_access_size = 8,
},
};
diff --git a/tests/Makefile.include b/tests/Makefile.include
index 613242bc6ef..fb0b449c02a 100644
--- a/tests/Makefile.include
+++ b/tests/Makefile.include
@@ -730,7 +730,7 @@ tests/test-hmp$(EXESUF): tests/test-hmp.o
tests/machine-none-test$(EXESUF): tests/machine-none-test.o
tests/drive_del-test$(EXESUF): tests/drive_del-test.o $(libqos-virtio-obj-y)
tests/qdev-monitor-test$(EXESUF): tests/qdev-monitor-test.o $(libqos-pc-obj-y)
-tests/nvme-test$(EXESUF): tests/nvme-test.o
+tests/nvme-test$(EXESUF): tests/nvme-test.o $(libqos-pc-obj-y)
tests/pvpanic-test$(EXESUF): tests/pvpanic-test.o
tests/i82801b11-test$(EXESUF): tests/i82801b11-test.o
tests/ac97-test$(EXESUF): tests/ac97-test.o
diff --git a/tests/nvme-test.c b/tests/nvme-test.c
index 7674a446e4f..2700ba838aa 100644
--- a/tests/nvme-test.c
+++ b/tests/nvme-test.c
@@ -8,25 +8,73 @@
*/
#include "qemu/osdep.h"
+#include "qemu/units.h"
#include "libqtest.h"
+#include "libqos/libqos-pc.h"
+
+static QOSState *qnvme_start(const char *extra_opts)
+{
+ QOSState *qs;
+ const char *arch = qtest_get_arch();
+ const char *cmd = "-drive id=drv0,if=none,file=null-co://,format=raw "
+ "-device nvme,addr=0x4.0,serial=foo,drive=drv0 %s";
+
+ if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) {
+ qs = qtest_pc_boot(cmd, extra_opts ? : "");
+ global_qtest = qs->qts;
+ return qs;
+ }
+
+ g_printerr("nvme tests are only available on x86\n");
+ exit(EXIT_FAILURE);
+}
+
+static void qnvme_stop(QOSState *qs)
+{
+ qtest_shutdown(qs);
+}
-/* Tests only initialization so far. TODO: Replace with functional tests */
static void nop(void)
{
+ QOSState *qs;
+
+ qs = qnvme_start(NULL);
+ qnvme_stop(qs);
}
-int main(int argc, char **argv)
+static void nvmetest_cmb_test(void)
{
- int ret;
+ const int cmb_bar_size = 2 * MiB;
+ QOSState *qs;
+ QPCIDevice *pdev;
+ QPCIBar bar;
- g_test_init(&argc, &argv, NULL);
- qtest_add_func("/nvme/nop", nop);
+ qs = qnvme_start("-global nvme.cmb_size_mb=2");
+ pdev = qpci_device_find(qs->pcibus, QPCI_DEVFN(4,0));
+ g_assert(pdev != NULL);
+
+ qpci_device_enable(pdev);
+ bar = qpci_iomap(pdev, 2, NULL);
+
+ qpci_io_writel(pdev, bar, 0, 0xccbbaa99);
+ g_assert_cmpint(qpci_io_readb(pdev, bar, 0), ==, 0x99);
+ g_assert_cmpint(qpci_io_readw(pdev, bar, 0), ==, 0xaa99);
+
+ /* Test partially out-of-bounds accesses. */
+ qpci_io_writel(pdev, bar, cmb_bar_size - 1, 0x44332211);
+ g_assert_cmpint(qpci_io_readb(pdev, bar, cmb_bar_size - 1), ==, 0x11);
+ g_assert_cmpint(qpci_io_readw(pdev, bar, cmb_bar_size - 1), !=, 0x2211);
+ g_assert_cmpint(qpci_io_readl(pdev, bar, cmb_bar_size - 1), !=, 0x44332211);
+ g_free(pdev);
- qtest_start("-drive id=drv0,if=none,file=null-co://,format=raw "
- "-device nvme,drive=drv0,serial=foo");
- ret = g_test_run();
+ qnvme_stop(qs);
+}
- qtest_end();
+int main(int argc, char **argv)
+{
+ g_test_init(&argc, &argv, NULL);
+ qtest_add_func("/nvme/nop", nop);
+ qtest_add_func("/nvme/cmb_test", nvmetest_cmb_test);
- return ret;
+ return g_test_run();
}
--
2.19.2

49
gnu/packages/patches/qemu-CVE-2018-16867.patch Normal file
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@ -0,0 +1,49 @@
Fix CVE-2018-16867:
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16867
https://seclists.org/oss-sec/2018/q4/202
Patch copied from upstream source repository:
https://git.qemu.org/?p=qemu.git;a=commitdiff;h=c52d46e041b42bb1ee6f692e00a0abe37a9659f6
From c52d46e041b42bb1ee6f692e00a0abe37a9659f6 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Mon, 3 Dec 2018 11:10:45 +0100
Subject: [PATCH] usb-mtp: outlaw slashes in filenames
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Slash is unix directory separator, so they are not allowed in filenames.
Note this also stops the classic escape via "../".
Fixes: CVE-2018-16867
Reported-by: Michael Hanselmann <public@hansmi.ch>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20181203101045.27976-3-kraxel@redhat.com
---
hw/usb/dev-mtp.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
index 0f6a9702ef1..100b7171f4e 100644
--- a/hw/usb/dev-mtp.c
+++ b/hw/usb/dev-mtp.c
@@ -1719,6 +1719,12 @@ static void usb_mtp_write_metadata(MTPState *s)
filename = utf16_to_str(dataset->length, dataset->filename);
+ if (strchr(filename, '/')) {
+ usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
+ 0, 0, 0, 0);
+ return;
+ }
+
o = usb_mtp_object_lookup_name(p, filename, dataset->length);
if (o != NULL) {
next_handle = o->handle;
--
2.19.2

2
gnu/packages/virtualization.scm
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@ -100,6 +100,8 @@
(method url-fetch)
(uri (string-append "https://download.qemu.org/qemu-"
version ".tar.xz"))
(patches (search-patches "qemu-CVE-2018-16847.patch"
"qemu-CVE-2018-16867.patch"))
(sha256
(base32
"04sp3f1gp4bdb913jf7fw761njaqp2l32wgipp1sapmxx17zcyld"))))