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Bug 1425939 - (CVE-2017-2633) CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution limit
CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution limit
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=20161201,repor...
: Security
Depends On: 1377977 1400438 1425943 1429798 1430616 1430617
Blocks: 1424988
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Reported: 2017-02-22 14:57 EST by Prasad J Pandit
Modified: 2018-07-27 06:22 EDT (History)
37 users (show)

See Also:
Fixed In Version: qemu 1.7.2
Doc Type: If docs needed, set a value
Doc Text:
An out-of-bounds memory access issue was found in Quick Emulator (QEMU) in the VNC display driver. This flaw could occur while refreshing the VNC display surface area in the 'vnc_refresh_server_surface'. A user inside a guest could use this flaw to crash the QEMU process.
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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-2017:1441 normal SHIPPED_LIVE Important: qemu-kvm-rhev security and bug fix update 2017-06-14 15:20:20 EDT
Red Hat Product Errata RHSA-2017:1856 normal SHIPPED_LIVE Moderate: qemu-kvm security, bug fix, and enhancement update 2017-08-01 14:03:36 EDT

  None (edit)
Description Prasad J Pandit 2017-02-22 14:57:47 EST 
Quick Emulator(Qemu) built with the VNC display driver support is vulnerable
to an out-of-bounds memory access issue. It could occur while refreshing
the vnc display surface area in 'vnc_refresh_server_surface'.

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

Older versions of Qemu are affected, latest upstream releases are not.

Upstream patch:
---------------
  -> http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=bea60dd7679364493a0d7f5b54316c767cf894ef
  -> http://git.qemu-project.org/?p=qemu.git;a=commitdiff;h=9f64916da20eea67121d544698676295bbb105a7

Reference:
----------
  -> http://www.openwall.com/lists/oss-security/2017/02/23/1
Comment 8 errata-xmlrpc 2017-05-09 07:07:20 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 08:46:33 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 10 errata-xmlrpc 2017-06-14 11:32:56 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 11 errata-xmlrpc 2017-08-01 13:52:26 EDT 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1856 https://access.redhat.com/errata/RHSA-2017:1856
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