Bug 1486588 (CVE-2017-13673) - CVE-2017-13673 QEMU: VGA: reachable assert failure during display update
Summary: CVE-2017-13673 QEMU: VGA: reachable assert failure during display update
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2017-13673
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: 1486589 1486591 1486645 1486646 1486647 1486648 1493359 1493360 1493361 1493362 1493363 1493364 1493365
Blocks: 1478328 1520691
TreeView+ depends on / blocked
 
Reported: 2017-08-30 08:19 UTC by Prasad Pandit
Modified: 2021-02-17 01:40 UTC (History)
51 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An assert failure issue was found in the VGA display emulator built into the Quick emulator (QEMU). It could occur while updating graphics display, due to miscalculating region for dirty bitmap snapshot in split screen mode. A privileged user/process inside guest could use this flaw to crash the QEMU process on the host resulting in denial of service.
Clone Of:
Environment:
Last Closed: 2019-06-08 03:22:37 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:1104 0 None None None 2018-04-10 18:57:04 UTC
Red Hat Product Errata RHSA-2018:1113 0 None None None 2018-04-11 18:03:55 UTC

Description Prasad Pandit 2017-08-30 08:19:26 UTC 
Quick emulator(Qemu) built with the VGA display emulator support is vulnerable
to an assert failure issue. It could occur while updating graphics display,
due to miscalculating region for dirty bitmap snapshot in split screen mode.

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2017-08/msg05333.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/08/30/4
Comment 1 Prasad Pandit 2017-08-30 08:20:07 UTC 
Acknowledgments:

Name: David Buchanan
Comment 2 Prasad Pandit 2017-08-30 08:21:36 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1486591]
Comment 3 Prasad Pandit 2017-08-30 08:22:01 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1486589]
Comment 11 Joshua Padman 2017-12-05 04:48:19 UTC 
Removing tracker and marking OSP6 as wontfix. RHEL 7.5 is released after OSP6 is EOL.
Comment 20 errata-xmlrpc 2018-04-10 18:56:43 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 21 errata-xmlrpc 2018-04-11 18:03:32 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 11.0 (Ocata)
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)
  Red Hat OpenStack Platform 12.0 (Pike)

Via RHSA-2018:1113 https://access.redhat.com/errata/RHSA-2018:1113
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