Bug 1384896 (CVE-2016-8668)

Summary: CVE-2016-8668 Qemu: net: OOB buffer access in rocker switch emulation
Product: [Other] Security Response Reporter: Prasad Pandit <ppandit>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ailan, amit.shah, apevec, areis, ayoung, berrange, cfergeau, chrisw, crobinso, cvsbot-xmlrpc, drjones, dwmw2, imammedo, itamar, jen, jschluet, kbasil, knoel, lhh, lpeer, markmc, m.a.young, mkenneth, mrezanin, mst, pbonzini, rbryant, rjones, rkrcmar, sclewis, srevivo, tdecacqu, virt-maint, virt-maint, vkuznets, xen-maint
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2019-06-08 03:00:10 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1384898    
Bug Blocks: 1384776    

Description Prasad Pandit 2016-10-14 10:47:32 UTC 
Quick Emulator(Qemu) built with the Rocker switch emulation support is
vulnerable to an OOB read access issue. It could occur while performing a DMA
access 'TEST_DMA_CTRL_INVERT' test.

A privileged guest user could use this issue to crash the Qemu process instance
on the host resulting in DoS.

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg02501.html
Comment 1 Prasad Pandit 2016-10-14 10:48:06 UTC 
Acknowledgments:

Name: PSIRT  (Huawei Inc.)
Comment 2 Prasad Pandit 2016-10-14 10:50:29 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1384898]
Comment 3 Andrej Nemec 2016-10-17 07:45:57 UTC 
CVE assignment:

http://seclists.org/oss-sec/2016/q4/141
Comment 4 Cole Robinson 2017-01-16 18:18:52 UTC 
commit 8caed3d564672e8bc6d2e4c6a35228afd01f4723
Author: Prasad J Pandit <pjp>
Date:   Wed Oct 12 14:40:55 2016 +0530

    net: rocker: set limit to DMA buffer size