Bug 1530356 (CVE-2018-5683) - CVE-2018-5683 Qemu: Out-of-bounds read in vga_draw_text routine
Summary: CVE-2018-5683 Qemu: Out-of-bounds read in vga_draw_text routine
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-5683
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: 1534671 1534672 1534680 1534681 1534682 1534683 1534684 1534685 1534686 1534687 1534688 1534689 1534690 1534691 1534692 1534693
Blocks: 1530362 1534927
TreeView+ depends on / blocked
 
Reported: 2018-01-02 18:06 UTC by Pedro Sampaio
Modified: 2021-02-09 03:24 UTC (History)
42 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An out-of-bounds read access issue was found in the VGA emulator of QEMU. It could occur in vga_draw_text routine, while updating display area for a vnc client. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:36:01 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:0816 0 None None None 2018-04-10 08:25:23 UTC
Red Hat Product Errata RHSA-2018:1104 0 None None None 2018-04-10 19:00:33 UTC
Red Hat Product Errata RHSA-2018:2162 0 None None None 2018-07-10 17:52:36 UTC

Description Pedro Sampaio 2018-01-02 18:06:43 UTC 
Quick Emulator(QEMU) built with the VGA emulator support is vulnerable to an out-of-bounds access issue in vga_draw_text. It could occur while updating vga display area.

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2018-01/msg02131.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2018/01/15/2
Comment 1 Pedro Sampaio 2018-01-02 18:06:57 UTC 
Acknowledgments:

Name: Jiang Xin, Lin ZheCheng
Comment 3 Prasad Pandit 2018-01-15 17:33:56 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1534672]


Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1534671]
Comment 8 Gerd Hoffmann 2018-01-26 06:47:56 UTC 
upstream commit 191f59dc17396bb5a8da50f8c59b6e0a430711a4
Comment 9 Joshua Padman 2018-02-06 21:00:58 UTC 
Red Hat OpenStack 6 will be End of Life on the 17th of February. Marking flaws as wontfix.
Comment 10 Joshua Padman 2018-04-03 23:00:26 UTC 
Red Hat OpenStack 7 will not be supported on RHEL 7.5, where the fix is being release. Marking OpenStack 7 as wontfix.
Comment 11 errata-xmlrpc 2018-04-10 08:25:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0816 https://access.redhat.com/errata/RHSA-2018:0816
Comment 12 errata-xmlrpc 2018-04-10 19:00:15 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for RHEL-7

Via RHSA-2018:1104 https://access.redhat.com/errata/RHSA-2018:1104
Comment 13 Joshua Padman 2018-04-25 23:07:28 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 8
  Red Hat OpenStack Platform 9
  Red Hat OpenStack Platform 10
  Red Hat OpenStack Platform 11
  Red Hat OpenStack Platform 12

https://access.redhat.com/errata/RHSA-2018:1113
Comment 14 errata-xmlrpc 2018-07-10 17:52:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2018:2162 https://access.redhat.com/errata/RHSA-2018:2162
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