Bug 1389702 (CVE-2016-9105) - CVE-2016-9105 Qemu: 9pfs: memory leakage in v9fs_link
Summary: CVE-2016-9105 Qemu: 9pfs: memory leakage in v9fs_link
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2016-9105
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: 1389704 1389705
Blocks: 1389508
TreeView+ depends on / blocked
 
Reported: 2016-10-28 09:29 UTC by Prasad Pandit
Modified: 2021-02-17 03:05 UTC (History)
36 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 03:01:37 UTC
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Description Prasad Pandit 2016-10-28 09:29:35 UTC 
Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9
File System(9pfs) support, is vulnerable to a memory leakage issue. It
could occur when calling v9fs_link call.

A privileged user inside guest could use this flaw to leak the host memory
bytes resulting in DoS for other services.

Upstream patches:
-----------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02608.html

Reference:
----------
  -> http://wiki.qemu.org/Documentation/9psetup
Comment 1 Prasad Pandit 2016-10-28 09:30:11 UTC 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad Pandit 2016-10-28 09:33:14 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1389705]
Comment 3 Prasad Pandit 2016-10-28 09:33:38 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1389704]
Comment 4 Andrej Nemec 2016-10-31 14:44:04 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/281
Comment 5 Cole Robinson 2017-01-16 18:31:53 UTC 
commit 4c1586787ff43c9acd18a56c12d720e3e6be9f7c
Author: Li Qiang <liqiang6-s>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: fix memory leak in v9fs_link
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