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Bug 1383291 - (CVE-2016-8578) CVE-2016-8578 Qemu: 9pfs: potential NULL dereferencein 9pfs routines
CVE-2016-8578 Qemu: 9pfs: potential NULL dereferencein 9pfs routines
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160927,reported=2...
: Security
Depends On: 1383292 1383293
Blocks: 1382469
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Reported: 2016-10-10 07:20 EDT by Prasad J Pandit
Modified: 2018-07-18 11:03 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-10-10 07:20:37 EDT 
Quick Emulator(Qemu) built with the virtio-9p back-end support is vulnerable
to a null pointer dereference issue. It could occur while doing an I/O vector
unmarshalling operation in v9fs_iov_vunmarshal() routine.

A privileged user/process inside guest could use this flaw to crash the Qemu
process instance resulting in Dos.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07143.html
Comment 1 Prasad J Pandit 2016-10-10 07:21:24 EDT 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-10-10 07:22:41 EDT 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1383293]
Comment 3 Prasad J Pandit 2016-10-10 07:23:00 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1383292]
Comment 4 Cole Robinson 2017-01-16 13:29:06 EST 
commit ba42ebb863ab7d40adc79298422ed9596df8f73a
Author: Li Qiang <liqiang6-s@360.cn>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: allocate space for guest originated empty strings
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