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authorArmin Kuster <akuster@mvista.com>2016-01-29 12:35:17 -0800
committerRichard Purdie <richard.purdie@linuxfoundation.org>2016-01-30 12:08:37 +0000
commitb01b569d7d7e651a35fa38750462f13aeb64a2f3 (patch)
treed30fb3a3d50d710bfa9c6447a0182255882f25e6
parentc622bdd7133d31d7fbefe87fb38187f0aea4b592 (diff)
downloadopenembedded-core-contrib-b01b569d7d7e651a35fa38750462f13aeb64a2f3.tar.gz
openembedded-core-contrib-b01b569d7d7e651a35fa38750462f13aeb64a2f3.tar.bz2
openembedded-core-contrib-b01b569d7d7e651a35fa38750462f13aeb64a2f3.zip
qemu: Security fix CVE-2015-7504
CVE-2015-7504 Qemu: net: pcnet: heap overflow vulnerability in loopback mode Signed-off-by: Armin Kuster <akuster@mvista.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rw-r--r--meta/recipes-devtools/qemu/qemu/CVE-2015-7504.patch56
-rw-r--r--meta/recipes-devtools/qemu/qemu_2.4.0.bb1
2 files changed, 57 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2015-7504.patch b/meta/recipes-devtools/qemu/qemu/CVE-2015-7504.patch
new file mode 100644
index 0000000000..90a7947abb
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2015-7504.patch
@@ -0,0 +1,56 @@
+From 837f21aacf5a714c23ddaadbbc5212f9b661e3f7 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Fri, 20 Nov 2015 11:50:31 +0530
+Subject: [PATCH] net: pcnet: add check to validate receive data
+ size(CVE-2015-7504)
+
+In loopback mode, pcnet_receive routine appends CRC code to the
+receive buffer. If the data size given is same as the buffer size,
+the appended CRC code overwrites 4 bytes after s->buffer. Added a
+check to avoid that.
+
+Reported by: Qinghao Tang <luodalongde@gmail.com>
+Cc: qemu-stable@nongnu.org
+Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Jason Wang <jasowang@redhat.com>
+
+Upstream-Status: Backport
+
+http://git.qemu.org/?p=qemu.git;a=commit;h=837f21aacf5a714c23ddaadbbc5212f9b661e3f7
+
+CVE: CVE-2015-7504
+[Yocto # 9013]
+
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ hw/net/pcnet.c | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+Index: qemu-2.4.0/hw/net/pcnet.c
+===================================================================
+--- qemu-2.4.0.orig/hw/net/pcnet.c
++++ qemu-2.4.0/hw/net/pcnet.c
+@@ -1085,7 +1085,7 @@ ssize_t pcnet_receive(NetClientState *nc
+ uint32_t fcs = ~0;
+ uint8_t *p = src;
+
+- while (p != &src[size-4])
++ while (p != &src[size])
+ CRC(fcs, *p++);
+ crc_err = (*(uint32_t *)p != htonl(fcs));
+ }
+@@ -1234,8 +1234,10 @@ static void pcnet_transmit(PCNetState *s
+ bcnt = 4096 - GET_FIELD(tmd.length, TMDL, BCNT);
+
+ /* if multi-tmd packet outsizes s->buffer then skip it silently.
+- Note: this is not what real hw does */
+- if (s->xmit_pos + bcnt > sizeof(s->buffer)) {
++ * Note: this is not what real hw does.
++ * Last four bytes of s->buffer are used to store CRC FCS code.
++ */
++ if (s->xmit_pos + bcnt > sizeof(s->buffer) - 4) {
+ s->xmit_pos = -1;
+ goto txdone;
+ }
diff --git a/meta/recipes-devtools/qemu/qemu_2.4.0.bb b/meta/recipes-devtools/qemu/qemu_2.4.0.bb
index fec1061212..58ce3b59de 100644
--- a/meta/recipes-devtools/qemu/qemu_2.4.0.bb
+++ b/meta/recipes-devtools/qemu/qemu_2.4.0.bb
@@ -11,6 +11,7 @@ SRC_URI += "file://configure-fix-Darwin-target-detection.patch \
file://smc91c111_fix3.patch \
file://no-valgrind.patch \
file://CVE-2015-8504.patch \
+ file://CVE-2015-7504.patch \
"
SRC_URI_prepend = "http://wiki.qemu-project.org/download/${BP}.tar.bz2"
SRC_URI[md5sum] = "186ee8194140a484a455f8e3c74589f4"