Bug 1382668 (CVE-2016-7995) - CVE-2016-7995 Qemu: usb: hcd-ehci: memory leak in ehci_process_itd
Summary: CVE-2016-7995 Qemu: usb: hcd-ehci: memory leak in ehci_process_itd
Status: NEW
Alias: CVE-2016-7995
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
(Show other bugs)
Version: unspecified
Hardware: All Linux
low
low
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Assignee: Red Hat Product Security
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Whiteboard: impact=low,public=20160926,reported=2...
Keywords: Security
Depends On: 1382669
Blocks: 1382469
TreeView+ depends on / blocked
 
Reported: 2016-10-07 11:03 UTC by Prasad J Pandit
Modified: 2018-07-18 15:02 UTC (History)
35 users (show)

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Description Prasad J Pandit 2016-10-07 11:03:57 UTC
Qemu emulator(Qemu) built with the USB EHCI emulation support is vulnerable
to a memory leakage flaw. It could occur while processing isochronous transfer
descriptors(iTD), with buffer page select(PG) index that falls beyond buffer
page array area.

A privileged user inside guest could use this flaw to leak Qemu memory bytes
leading to a DoS on the host.

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg06609.html

Comment 1 Prasad J Pandit 2016-10-07 11:04:28 UTC
Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad J Pandit 2016-10-07 11:06:29 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1382669]


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