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Bug 1389642 - (CVE-2016-9103) CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
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=20161008,reported=2...
: Security
Depends On: 1389643 1389644
Blocks: 1389508
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Reported: 2016-10-28 01:48 EDT by Prasad J Pandit
Modified: 2018-07-18 11:05 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-10-28 01:48:06 EDT 
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to an information leakage issue. It
could occur by accessing xattribute value before it's written to.

A privileged user inside guest could use this flaw to leak host memory bytes.

Upstream patches:
-----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg01790.html

Reference:
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  -> http://wiki.qemu.org/Documentation/9psetup
Comment 1 Prasad J Pandit 2016-10-28 01:48:11 EDT 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-10-28 01:50:19 EDT 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1389644]
Comment 3 Prasad J Pandit 2016-10-28 01:50:42 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1389643]
Comment 4 Andrej Nemec 2016-10-31 10:57:03 EDT 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/279
Comment 5 Cole Robinson 2017-01-16 13:29:53 EST 
commit eb687602853b4ae656e9236ee4222609f3a6887d
Author: Li Qiang <liqiang6-s@360.cn>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: fix information leak in xattr read
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