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Bug 1389550 - (CVE-2016-9102) CVE-2016-9102 Qemu: 9pfs: memory leakage when creating extended attribute
CVE-2016-9102 Qemu: 9pfs: memory leakage when creating extended attribute
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=20161010,reported=2...
: Security
Depends On: 1389551 1389552
Blocks: 1389508
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Reported: 2016-10-27 16:59 EDT by Prasad J Pandit
Modified: 2018-07-18 11:05 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-10-27 16:59:45 EDT 
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to memory leakage issue. It could
occur while creating extended attribute via 'Txattrcreate' message.

A privileged user inside guest could use this flaw to leak host memory,
thus affecting other services on the host and/or potentially crash the Qemu
process on the host.

Upstream patches:
-----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg01861.html

Reference:
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  -> http://wiki.qemu.org/Documentation/9psetup
  -> http://www.openwall.com/lists/oss-security/2016/10/27/15
Comment 1 Prasad J Pandit 2016-10-27 16:59:51 EDT 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-10-27 17:01:10 EDT 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1389552]
Comment 3 Prasad J Pandit 2016-10-27 17:01:33 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1389551]
Comment 4 Andrej Nemec 2016-10-31 10:51:30 EDT 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/278
Comment 5 Cole Robinson 2017-01-16 13:29:34 EST 
commit ff55e94d23ae94c8628b0115320157c763eb3e06
Author: Li Qiang <liqiang6-s@360.cn>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: fix memory leak in v9fs_xattrcreate
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