Bug 1402967 (CVE-2016-9923) - CVE-2016-9923 Qemu: char: use-after-free issue during hotplug and unplugging device
Summary: CVE-2016-9923 Qemu: char: use-after-free issue during hotplug and unplugging ...
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-9923
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1402968 1402972
Blocks: 1395985
TreeView+ depends on / blocked
 
Reported: 2016-12-08 19:10 UTC by Prasad J Pandit
Modified: 2021-02-17 02:54 UTC (History)
35 users (show)

Fixed In Version:
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Environment:
Last Closed: 2019-06-08 03:04:01 UTC


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Description Prasad J Pandit 2016-12-08 19:10:38 UTC
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:
----------
  -> http://www.openwall.com/lists/oss-security/2016/12/08/11

Comment 1 Prasad J Pandit 2016-12-08 19:12:00 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1402968]

Comment 2 Prasad J Pandit 2016-12-08 19:16:59 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1402972]

Comment 3 Prasad J Pandit 2016-12-08 19:19:06 UTC
Acknowledgments:

Name: Li Qiang (360.cn Inc.)


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