Bug 1425939 (CVE-2017-2633)

Summary:	CVE-2017-2633 Qemu: VNC: memory corruption due to unchecked resolution limit
Product:	[Other] Security Response	Reporter:	Prasad Pandit <ppandit>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	ailan, amit, apevec, areis, ayoung, berrange, cfergeau, chrisw, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, sclewis, slong, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:08:05 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1377977, 1400438, 1425943, 1429798, 1430616, 1430617
Bug Blocks:	1424988

Description Prasad Pandit 2017-02-22 19:57:47 UTC

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 11:07:20 UTC

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 12:46:33 UTC

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 15:32:56 UTC

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 17:52:26 UTC

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