5a0f88db96
Fix CVE-2013-4148 (bnc#864812), CVE-2013-4149 (bnc#864649), CVE-2013-4150 (bnc#864650), CVE-2013-4151 (bnc#864653), CVE-2013-4526 (bnc#864671), CVE-2013-4527 (bnc#864673), CVE-2013-4529 (bnc#864678), CVE-2013-4530 (bnc#864682), CVE-2013-4531 (bnc#864796), CVE-2013-4533 (bnc#864655), CVE-2013-4534 (bnc#864811), CVE-2013-4535 / CVE-2013-4536 (bnc#864665), CVE-2013-4537 (bnc#864391), CVE-2013-4538 (bnc#864769), CVE-2013-4539 (bnc#864805), CVE-2013-4540 (bnc#864801), CVE-2013-4541 (bnc#864802), CVE-2013-4542 (bnc#864804), CVE-2013-6399 (bnc#864814), CVE-2014-0182 (bnc#874788) OBS-URL: https://build.opensuse.org/request/show/235280 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=211
47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From c5b839d16efe607af264cd6c2d99124b2a10bc02 Mon Sep 17 00:00:00 2001
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From: "Michael S. Tsirkin" <mst@redhat.com>
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Date: Thu, 3 Apr 2014 19:51:53 +0300
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Subject: [PATCH] virtio: validate num_sg when mapping
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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CVE-2013-4535
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CVE-2013-4536
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Both virtio-block and virtio-serial read,
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VirtQueueElements are read in as buffers, and passed to
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virtqueue_map_sg(), where num_sg is taken from the wire and can force
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writes to indicies beyond VIRTQUEUE_MAX_SIZE.
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To fix, validate num_sg.
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Reported-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Cc: Amit Shah <amit.shah@redhat.com>
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Signed-off-by: Juan Quintela <quintela@redhat.com>
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(cherry picked from commit 36cf2a37132c7f01fa9adb5f95f5312b27742fd4)
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[AF: BNC#864665]
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Signed-off-by: Andreas Färber <afaerber@suse.de>
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---
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hw/virtio/virtio.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c
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index 0072542..a70169a 100644
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--- a/hw/virtio/virtio.c
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+++ b/hw/virtio/virtio.c
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@@ -430,6 +430,12 @@ void virtqueue_map_sg(struct iovec *sg, hwaddr *addr,
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unsigned int i;
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hwaddr len;
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+ if (num_sg >= VIRTQUEUE_MAX_SIZE) {
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+ error_report("virtio: map attempt out of bounds: %zd > %d",
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+ num_sg, VIRTQUEUE_MAX_SIZE);
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+ exit(1);
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+ }
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+
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for (i = 0; i < num_sg; i++) {
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len = sg[i].iov_len;
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sg[i].iov_base = cpu_physical_memory_map(addr[i], &len, is_write);
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