commit 98f93ddd84800f207889491e0b5d851386b459cf
author Michael S. Tsirkin <mst@redhat.com> Mon Apr 28 16:08:21 2014 +0300
committer Juan Quintela <quintela@redhat.com> Mon May 05 22:15:03 2014 +0200
tree 085acc36e1693aca021848f1b2de9d2bbe0c5dda
parent 73d963c0a75cb99c6aaa3f6f25e427aa0b35a02e

virtio-net: out-of-bounds buffer write on load

CVE-2013-4149 QEMU 1.3.0 out-of-bounds buffer write in
virtio_net_load()@hw/net/virtio-net.c

>         } else if (n->mac_table.in_use) {
>             uint8_t *buf = g_malloc0(n->mac_table.in_use);

We are allocating buffer of size n->mac_table.in_use

>             qemu_get_buffer(f, buf, n->mac_table.in_use * ETH_ALEN);

and read to the n->mac_table.in_use size buffer n->mac_table.in_use *
ETH_ALEN bytes, corrupting memory.

If adversary controls state then memory written there is controlled
by adversary.

Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>