Bug 1530360 (CVE-2017-18030)

Summary: CVE-2017-18030 Qemu: Out-of-bounds access in cirrus_invalidate_region routine
Product: [Other] Security Response Reporter: Pedro Sampaio <psampaio>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ailan, amit, apevec, areis, berrange, cfergeau, chrisw, drjones, dwmw2, imammedo, itamar, jen, jforbes, jjoyce, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mburns, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rbryant, rjones, rkrcmar, robinlee.sysu, sclewis, security-response-team, slinaber, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of: Environment:
Last Closed: 2018-01-16 10:13:16 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1534673    
Bug Blocks: 1530362    

Description Pedro Sampaio 2018-01-02 18:32:14 UTC
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 refreshing vnc surface area, in case the initial pitch was negative in cirrus_invalidate_region.

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

Upstream patch:
  -> https://git.qemu.org/?p=qemu.git;a=commitdiff;h=f153b563f8cf121aebf5a2fff5f0110faf58ccb3

  -> http://www.openwall.com/lists/oss-security/2018/01/15/3

Comment 2 Prasad Pandit 2018-01-15 17:36:46 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1534673]