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Bug 1402967 - (CVE-2016-9923) CVE-2016-9923 Qemu: char: use-after-free issue during hotplug and unplugging device
CVE-2016-9923 Qemu: char: use-after-free issue during hotplug and unplugging ...
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=20161124,reported=2...
: Security
Depends On: 1402968 1402972
Blocks: 1395985
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Reported: 2016-12-08 14:10 EST by Prasad J Pandit
Modified: 2018-07-18 11:08 EDT (History)
35 users (show)

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Description Prasad J Pandit 2016-12-08 14:10:38 EST 
Quick Emulator(Qemu) built with the 'chardev' backend support is vulnerable
to a use after free issue. It could occur while repeatedly hot-plugging and
unplugging 'chardev' device in the guest.

A guest user/process could use this flaw to crash a Qemu process on the host
resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg05597.html
  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=a4afa548fc6dd9842ed86639b4d37d4d1c4ad480

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/12/08/11
Comment 1 Prasad J Pandit 2016-12-08 14:12:00 EST 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1402968]
Comment 2 Prasad J Pandit 2016-12-08 14:16:59 EST 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1402972]
Comment 3 Prasad J Pandit 2016-12-08 14:19:06 EST 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
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