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Bug 1443441 - (CVE-2017-7718) CVE-2017-7718 Qemu: display: cirrus: OOB read access issue
CVE-2017-7718 Qemu: display: cirrus: OOB read access issue
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20170314,repor...
: Security
Depends On: 1443443 1443444 1443447 1443448 1443449 1443450 1443451 1443452 1443453 1443454 1443456 1443457 1443459 1443460 1443461 1443463 1443464 1445557
Blocks: 1432498
  Show dependency tree / graph
 
Reported: 2017-04-19 05:32 EDT by Prasad J Pandit
Modified: 2018-07-18 11:19 EDT (History)
40 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service.
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1205 normal SHIPPED_LIVE Important: qemu-kvm-rhev security update 2017-05-09 11:07:02 EDT
Red Hat Product Errata RHSA-2017:1206 normal SHIPPED_LIVE Important: qemu-kvm security update 2017-05-09 12:29:49 EDT
Red Hat Product Errata RHSA-2017:1430 normal SHIPPED_LIVE Important: qemu-kvm security and bug fix update 2017-06-13 07:26:41 EDT
Red Hat Product Errata RHSA-2017:1431 normal SHIPPED_LIVE Important: qemu-kvm-rhev security and bug fix update 2017-06-13 07:16:36 EDT
Red Hat Product Errata RHSA-2017:1441 normal SHIPPED_LIVE Important: qemu-kvm-rhev security and bug fix update 2017-06-14 15:20:20 EDT

  None (edit)
Description Prasad J Pandit 2017-04-19 05:32:48 EDT 
Quick emulator(Qemu) built with the Cirrus CLGD 54xx VGA Emulator support is
vulnerable to an out-of-bounds access issue. It could occur while copying
VGA data via bitblt functions cirrus_bitblt_rop_fwd_transp_ and/or
cirrus_bitblt_rop_fwd_.

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

Upstream patch
--------------
  -> http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=215902d7b6fb50c6fc216fc74f770858278ed904

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/04/19/4
Comment 1 Prasad J Pandit 2017-04-19 05:34:31 EDT 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1443444]
Comment 2 Prasad J Pandit 2017-04-19 05:34:52 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1443443]
Comment 3 Prasad J Pandit 2017-04-19 05:39:31 EDT 
Acknowledgements:

Name: Jiangxin (PSIRT Huawei Inc.)
Comment 8 errata-xmlrpc 2017-05-09 07:08:31 EDT 
This issue has been addressed in the following products:

  RHEV 3.X Hypervisor and Agents for RHEL-6

Via RHSA-2017:1205 https://access.redhat.com/errata/RHSA-2017:1205
Comment 9 errata-xmlrpc 2017-05-09 08:48:02 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2017:1206 https://access.redhat.com/errata/RHSA-2017:1206
Comment 17 errata-xmlrpc 2017-06-13 03:16:58 EDT 
This issue has been addressed in the following products:

  RHEV 3.X Hypervisor and Agents for RHEL-7
  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2017:1431 https://access.redhat.com/errata/RHSA-2017:1431
Comment 18 errata-xmlrpc 2017-06-13 03:27:02 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1430 https://access.redhat.com/errata/RHSA-2017:1430
Comment 19 errata-xmlrpc 2017-06-14 11:34:25 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6

Via RHSA-2017:1441 https://access.redhat.com/errata/RHSA-2017:1441
Comment 20 Fedora Update System 2017-07-25 17:23:49 EDT 
qemu-2.7.1-7.fc25 has been pushed to the Fedora 25 stable repository. If problems still persist, please make note of it in this bug report.
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