[OE-core] [thud] 28/30] qemu: Security fixes CVE-2018-20815 CVE-2019-9824
Armin Kuster
akuster808 at gmail.com
Sun Jul 21 14:25:17 UTC 2019
From: Armin Kuster <akuster at mvista.com>
Source: qemu.org
MR: 98623
Type: Security Fix
Disposition: Backport from qemu.org
ChangeID: 03b3f28e5860ef1cb9f58dce89f252bd7ed59f37
Description:
Fixes both CVE-2018-20815 and CVE-2019-9824
Signed-off-by: Armin Kuster <akuster at mvista.com>
Signed-off-by: Armin Kuster <akuster808 at gmail.com>
---
.../qemu/qemu/CVE-2018-20815_p1.patch | 42 +++++++++++++++++
.../qemu/qemu/CVE-2018-20815_p2.patch | 52 ++++++++++++++++++++++
.../recipes-devtools/qemu/qemu/CVE-2019-9824.patch | 47 +++++++++++++++++++
meta/recipes-devtools/qemu/qemu_3.0.0.bb | 3 ++
4 files changed, 144 insertions(+)
create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p1.patch
create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p2.patch
create mode 100644 meta/recipes-devtools/qemu/qemu/CVE-2019-9824.patch
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p1.patch b/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p1.patch
new file mode 100644
index 0000000..c3a5981
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p1.patch
@@ -0,0 +1,42 @@
+From da885fe1ee8b4589047484bd7fa05a4905b52b17 Mon Sep 17 00:00:00 2001
+From: Peter Maydell <peter.maydell at linaro.org>
+Date: Fri, 14 Dec 2018 13:30:52 +0000
+Subject: [PATCH] device_tree.c: Don't use load_image()
+
+The load_image() function is deprecated, as it does not let the
+caller specify how large the buffer to read the file into is.
+Instead use load_image_size().
+
+Signed-off-by: Peter Maydell <peter.maydell at linaro.org>
+Reviewed-by: Richard Henderson <richard.henderson at linaro.org>
+Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com>
+Reviewed-by: Michael S. Tsirkin <mst at redhat.com>
+Reviewed-by: Eric Blake <eblake at redhat.com>
+Message-id: 20181130151712.2312-9-peter.maydell at linaro.org
+
+Upstream-Status: Backport
+CVE: CVE-2018-20815
+affects <= 3.0.1
+
+Signed-off-by: Armin Kuster <akuster at mvista.com>
+
+---
+ device_tree.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/device_tree.c b/device_tree.c
+index 6d9c972..296278e 100644
+--- a/device_tree.c
++++ b/device_tree.c
+@@ -91,7 +91,7 @@ void *load_device_tree(const char *filename_path, int *sizep)
+ /* First allocate space in qemu for device tree */
+ fdt = g_malloc0(dt_size);
+
+- dt_file_load_size = load_image(filename_path, fdt);
++ dt_file_load_size = load_image_size(filename_path, fdt, dt_size);
+ if (dt_file_load_size < 0) {
+ error_report("Unable to open device tree file '%s'",
+ filename_path);
+--
+2.7.4
+
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p2.patch b/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p2.patch
new file mode 100644
index 0000000..d01e874
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2018-20815_p2.patch
@@ -0,0 +1,52 @@
+From 065e6298a75164b4347682b63381dbe752c2b156 Mon Sep 17 00:00:00 2001
+From: Markus Armbruster <armbru at redhat.com>
+Date: Tue, 9 Apr 2019 19:40:18 +0200
+Subject: [PATCH] device_tree: Fix integer overflowing in load_device_tree()
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+If the value of get_image_size() exceeds INT_MAX / 2 - 10000, the
+computation of @dt_size overflows to a negative number, which then
+gets converted to a very large size_t for g_malloc0() and
+load_image_size(). In the (fortunately improbable) case g_malloc0()
+succeeds and load_image_size() survives, we'd assign the negative
+number to *sizep. What that would do to the callers I can't say, but
+it's unlikely to be good.
+
+Fix by rejecting images whose size would overflow.
+
+Reported-by: Kurtis Miller <kurtis.miller at nccgroup.com>
+Signed-off-by: Markus Armbruster <armbru at redhat.com>
+Reviewed-by: Philippe Mathieu-Daudé <philmd at redhat.com>
+Signed-off-by: Alistair Francis <alistair.francis at wdc.com>
+Message-Id: <20190409174018.25798-1-armbru at redhat.com>
+
+Upstream-Status: Backport
+CVE: CVE-2018-20815
+affects <= 3.0.1
+
+Signed-off-by: Armin Kuster <akuster at mvista.com>
+
+---
+ device_tree.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/device_tree.c b/device_tree.c
+index 296278e..f8b46b3 100644
+--- a/device_tree.c
++++ b/device_tree.c
+@@ -84,6 +84,10 @@ void *load_device_tree(const char *filename_path, int *sizep)
+ filename_path);
+ goto fail;
+ }
++ if (dt_size > INT_MAX / 2 - 10000) {
++ error_report("Device tree file '%s' is too large", filename_path);
++ goto fail;
++ }
+
+ /* Expand to 2x size to give enough room for manipulation. */
+ dt_size += 10000;
+--
+2.7.4
+
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2019-9824.patch b/meta/recipes-devtools/qemu/qemu/CVE-2019-9824.patch
new file mode 100644
index 0000000..7f83006
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2019-9824.patch
@@ -0,0 +1,47 @@
+From d3222975c7d6cda9e25809dea05241188457b113 Mon Sep 17 00:00:00 2001
+From: William Bowling <will at wbowling.info>
+Date: Fri, 1 Mar 2019 21:45:56 +0000
+Subject: [PATCH 1/1] slirp: check sscanf result when emulating ident
+MIME-Version: 1.0
+Content-Type: text/plain; charset=utf8
+Content-Transfer-Encoding: 8bit
+
+When emulating ident in tcp_emu, if the strchr checks passed but the
+sscanf check failed, two uninitialized variables would be copied and
+sent in the reply, so move this code inside the if(sscanf()) clause.
+
+Signed-off-by: William Bowling <will at wbowling.info>
+Cc: qemu-stable at nongnu.org
+Cc: secalert at redhat.com
+Message-Id: <1551476756-25749-1-git-send-email-will at wbowling.info>
+Signed-off-by: Samuel Thibault <samuel.thibault at ens-lyon.org>
+Reviewed-by: Philippe Mathieu-Daudé <philmd at redhat.com>
+
+Upstream-Status: Backport
+https://git.qemu.org/?p=qemu.git;a=commitdiff;h=d3222975c7d6cda9e25809dea05241188457b113;hp=6c419a1e06c21c4568d5a12a9c5cafcdb00f6aa8
+CVE: CVE-2019-9824
+affects < 4.0.0
+Signed-off-by: Armin Kuster <akuster at mvista.com>
+
+Index: qemu-3.0.0/slirp/tcp_subr.c
+===================================================================
+--- qemu-3.0.0.orig/slirp/tcp_subr.c
++++ qemu-3.0.0/slirp/tcp_subr.c
+@@ -662,12 +662,12 @@ tcp_emu(struct socket *so, struct mbuf *
+ break;
+ }
+ }
++ so_rcv->sb_cc = snprintf(so_rcv->sb_data,
++ so_rcv->sb_datalen,
++ "%d,%d\r\n", n1, n2);
++ so_rcv->sb_rptr = so_rcv->sb_data;
++ so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc;
+ }
+- so_rcv->sb_cc = snprintf(so_rcv->sb_data,
+- so_rcv->sb_datalen,
+- "%d,%d\r\n", n1, n2);
+- so_rcv->sb_rptr = so_rcv->sb_data;
+- so_rcv->sb_wptr = so_rcv->sb_data + so_rcv->sb_cc;
+ }
+ m_free(m);
+ return 0;
diff --git a/meta/recipes-devtools/qemu/qemu_3.0.0.bb b/meta/recipes-devtools/qemu/qemu_3.0.0.bb
index 63a6468..b591cc24 100644
--- a/meta/recipes-devtools/qemu/qemu_3.0.0.bb
+++ b/meta/recipes-devtools/qemu/qemu_3.0.0.bb
@@ -32,6 +32,9 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://CVE-2018-19364_p2.patch \
file://CVE-2018-19489.patch \
file://CVE-2019-12155.patch \
+ file://CVE-2018-20815_p1.patch \
+ file://CVE-2018-20815_p2.patch \
+ file://CVE-2019-9824.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"
--
2.7.4
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