From: Simon Rowe <simon.rowe@nutanix.com>
To: qemu-devel@nongnu.org
Cc: John Snow <jsnow@redhat.com>,
qemu-block@nongnu.org, f.ebner@proxmox.com,
Simon Rowe <simon.rowe@nutanix.com>
Subject: [PATCH 0/1] CVE-2023-5088
Date: Thu, 21 Sep 2023 16:07:11 +0000 [thread overview]
Message-ID: <20230921160712.99521-1-simon.rowe@nutanix.com> (raw)
The attached patch fixes CVE-2023-5088 in which a bug in QEMU could
cause a guest I/O operation otherwise addressed to an arbitrary disk
offset to be targeted to offset 0 instead (potentially overwriting the
VM's boot code). This could be used, for example, by L2 guests with a
virtual disk (vdiskL2) stored on a virtual disk of an L1 (vdiskL1)
hypervisor to read and/or write data to LBA 0 of vdiskL1, potentially
gaining control of L1 at its next reboot.
The symptoms behind this bug have been previously reported as MBR
corruptions and an independent fix has been posted by Fiona Ebner in:
https://lists.gnu.org/archive/html/qemu-devel/2023-08/msg03883.html
Simon Rowe (1):
hw/ide/core: terminate in-flight DMA on IDE bus reset
hw/ide/core.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
--
2.22.3
next reply other threads:[~2023-09-21 16:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-21 16:07 Simon Rowe [this message]
2023-09-21 16:07 ` [PATCH 1/1] hw/ide/core: terminate in-flight DMA on IDE bus reset Simon Rowe
2023-09-25 19:53 ` John Snow
2023-09-26 7:11 ` Fiona Ebner
2023-09-26 14:45 ` John Snow
2023-09-28 11:23 ` Fiona Ebner
2023-10-02 9:08 ` Simon Rowe
2023-10-02 22:59 ` John Snow
2023-10-03 12:46 ` Simon Rowe
2023-10-03 14:06 ` Niklas Cassel
2023-10-03 17:05 ` John Snow
2023-10-04 7:51 ` Simon Rowe
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