Bug 1389642 (CVE-2016-9103) - CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
Summary: CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-9103
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: 1389643 1389644
Blocks: 1389508
TreeView+ depends on / blocked
 
Reported: 2016-10-28 05:48 UTC by Prasad Pandit
Modified: 2021-02-17 03:06 UTC (History)
36 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:01:33 UTC
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Description Prasad Pandit 2016-10-28 05:48:06 UTC 
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:
----------
  -> http://wiki.qemu.org/Documentation/9psetup
Comment 1 Prasad Pandit 2016-10-28 05:48:11 UTC 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad Pandit 2016-10-28 05:50:19 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1389644]
Comment 3 Prasad Pandit 2016-10-28 05:50:42 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1389643]
Comment 4 Andrej Nemec 2016-10-31 14:57:03 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/279
Comment 5 Cole Robinson 2017-01-16 18:29:53 UTC 
commit eb687602853b4ae656e9236ee4222609f3a6887d
Author: Li Qiang <liqiang6-s>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: fix information leak in xattr read
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