Bug 1389642 (CVE-2016-9103) - CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
Summary: CVE-2016-9103 Qemu: 9pfs: information leakage via xattr
Alias: CVE-2016-9103
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1389643 1389644
Blocks: 1389508
TreeView+ depends on / blocked
Reported: 2016-10-28 05:48 UTC by Prasad J Pandit
Modified: 2021-02-17 03:06 UTC (History)
36 users (show)

Fixed In Version:
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Clone Of:
Last Closed: 2019-06-08 03:01:33 UTC

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Description Prasad J 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

  -> http://wiki.qemu.org/Documentation/9psetup

Comment 1 Prasad J Pandit 2016-10-28 05:48:11 UTC

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad J Pandit 2016-10-28 05:50:19 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1389644]

Comment 3 Prasad J 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:


Comment 5 Cole Robinson 2017-01-16 18:29:53 UTC
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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