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Bug 609202 (CVE-2017-2620) - [TRACKER] qemu: display: cirrus_bitblt_cputovideo does not check if memory region is safe
Summary: [TRACKER] qemu: display: cirrus_bitblt_cputovideo does not check if memory re...
Status: RESOLVED FIXED
Alias: CVE-2017-2620
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
URL:
Whiteboard:
Keywords: Tracker
Depends on: XSA-209 609206
Blocks:
  Show dependency tree
 
Reported: 2017-02-13 02:26 UTC by Thomas Deutschmann (RETIRED)
Modified: 2017-07-15 22:58 UTC (History)
0 users

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Runtime testing required: ---

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Description Thomas Deutschmann (RETIRED) gentoo-dev 2017-02-13 02:26:44 UTC 
ISSUE DESCRIPTION
=================

In CIRRUS_BLTMODE_MEMSYSSRC mode the bitblit copy routine
cirrus_bitblt_cputovideo fails to check wethehr the specified memory
region is safe.

IMPACT
======

A malicious guest administrator can cause an out of bounds memory
write, very likely exploitable as a privilege escalation.