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Bug 1376755 - (CVE-2016-7422) CVE-2016-7422 Qemu: virtio: null pointer dereference in virtqueu_map_desc
CVE-2016-7422 Qemu: virtio: null pointer dereference in virtqueu_map_desc
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160915,reported=2...
: Security
Depends On: 1376756 1377517 1476049 1476068 1476069 1476072 1476074 1476077
Blocks: 1369163 1476084
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Reported: 2016-09-16 06:36 EDT by Prasad J Pandit
Modified: 2018-07-18 11:01 EDT (History)
39 users (show)

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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:2392 normal SHIPPED_LIVE Important: qemu-kvm-rhev security, bug fix, and enhancement update 2017-08-01 16:04:36 EDT
Red Hat Product Errata RHSA-2017:2408 normal SHIPPED_LIVE Moderate: qemu-kvm-rhev security and bug fix update 2017-08-01 21:17:55 EDT

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Description Prasad J Pandit 2016-09-16 06:36:23 EDT 
Quick emulator(Qemu) built with the virtio framework is vulnerable to a null
pointer dereference flaw. It could occur if the guest was to set the I/O
descriptor buffer length to a large value.

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

Upstream fix:
-------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg03546.html

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2016/09/16/4
Comment 1 Prasad J Pandit 2016-09-16 06:37:01 EDT 
Acknowledgments:

Name: Qinghao Tang (360.cn Marvel Team), Zhenhao Hong (360.cn Marvel Team)
Comment 2 Prasad J Pandit 2016-09-16 06:40:51 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1376756]
Comment 7 errata-xmlrpc 2017-08-01 20:56:40 EDT 
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 Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
  Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)

Via RHSA-2017:2408 https://access.redhat.com/errata/RHSA-2017:2408
Comment 8 errata-xmlrpc 2017-08-02 00:45:33 EDT 
This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2017:2392 https://access.redhat.com/errata/RHSA-2017:2392
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