Bug 1383291 (CVE-2016-8578) - CVE-2016-8578 Qemu: 9pfs: potential NULL dereferencein 9pfs routines
Summary: CVE-2016-8578 Qemu: 9pfs: potential NULL dereferencein 9pfs routines
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-8578
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: 1383292 1383293
Blocks: 1382469
TreeView+ depends on / blocked
 
Reported: 2016-10-10 11:20 UTC by Prasad Pandit
Modified: 2021-02-17 03:13 UTC (History)
36 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 02:59:55 UTC
Embargoed:

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Description Prasad Pandit 2016-10-10 11:20:37 UTC 
Quick Emulator(Qemu) built with the virtio-9p back-end support is vulnerable
to a null pointer dereference issue. It could occur while doing an I/O vector
unmarshalling operation in v9fs_iov_vunmarshal() routine.

A privileged user/process inside guest could use this flaw to crash the Qemu
process instance resulting in Dos.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07143.html
Comment 1 Prasad Pandit 2016-10-10 11:21:24 UTC 
Acknowledgments:

Name: Li Qiang (360.cn Inc.)
Comment 2 Prasad Pandit 2016-10-10 11:22:41 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1383293]
Comment 3 Prasad Pandit 2016-10-10 11:23:00 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1383292]
Comment 4 Cole Robinson 2017-01-16 18:29:06 UTC 
commit ba42ebb863ab7d40adc79298422ed9596df8f73a
Author: Li Qiang <liqiang6-s>
Date:   Mon Oct 17 14:13:58 2016 +0200

    9pfs: allocate space for guest originated empty strings
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