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qemu : fix CVE-2020-16092

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(From OE-Core rev: 6007398a0ff468c0b15c4982d7f04e6186d6d700)

Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Chee Yang Lee
2020-09-18 17:37:01 +08:00
committed by Richard Purdie
parent e3a6561373
commit d51df4da28
2 changed files with 46 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
meta/recipes-devtools/qemu/qemu.inc
View File

@@ -47,6 +47,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \
file://CVE-2020-15863.patch \
file://CVE-2020-14364.patch \
file://CVE-2020-14415.patch \
file://CVE-2020-16092.patch \
"
UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar"

45
meta/recipes-devtools/qemu/qemu/CVE-2020-16092.patch Normal file
View File

@@ -0,0 +1,45 @@
From 035e69b063835a5fd23cacabd63690a3d84532a8 Mon Sep 17 00:00:00 2001
From: Mauro Matteo Cascella <mcascell@redhat.com>
Date: Sat, 1 Aug 2020 18:42:38 +0200
Subject: [PATCH] hw/net/net_tx_pkt: fix assertion failure in
net_tx_pkt_add_raw_fragment()
An assertion failure issue was found in the code that processes network packets
while adding data fragments into the packet context. It could be abused by a
malicious guest to abort the QEMU process on the host. This patch replaces the
affected assert() with a conditional statement, returning false if the current
data fragment exceeds max_raw_frags.
Reported-by: Alexander Bulekov <alxndr@bu.edu>
Reported-by: Ziming Zhang <ezrakiez@gmail.com>
Reviewed-by: Dmitry Fleytman <dmitry.fleytman@gmail.com>
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=commit;h=035e69b063835a5fd23cacabd63690a3d84532a8]
CVE: CVE-2020-16092
Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
---
hw/net/net_tx_pkt.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/hw/net/net_tx_pkt.c b/hw/net/net_tx_pkt.c
index 9560e4a..da262ed 100644
--- a/hw/net/net_tx_pkt.c
+++ b/hw/net/net_tx_pkt.c
@@ -379,7 +379,10 @@ bool net_tx_pkt_add_raw_fragment(struct NetTxPkt *pkt, hwaddr pa,
hwaddr mapped_len = 0;
struct iovec *ventry;
assert(pkt);
- assert(pkt->max_raw_frags > pkt->raw_frags);
+
+ if (pkt->raw_frags >= pkt->max_raw_frags) {
+ return false;
+ }
if (!len) {
return true;
--
1.8.3.1