Bug 1303226

Summary: qemu: Use-after-free vulnerability when unplugging devices
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: abaron, ailan, alonbl, aortega, apevec, areis, ayoung, bmcclain, chrisw, dallan, dblechte, drjones, gklein, gkotton, imammedo, jen, jschluet, knoel, lhh, lpeer, markmc, mgoldboi, michal.skrivanek, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rbryant, rkrcmar, sclewis, security-response-team, sherold, tdecacqu, vkuznets, yeylon, ykaul, ylavi
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2016-02-11 06:20:18 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:    
Bug Blocks: 1305966    

Description Adam Mariš 2016-01-29 21:27:27 UTC 
Qemu emulator built with the IDE Emulation with PCI PIIX3/4 support is vulnerable to a use after free flaw. It occurs while unplugging the IDE device in pci_piix3_xen_ide_unplug in Xen virtualisation setup.

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

Upstream patch:
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  -> http://git.qemu.org/?p=qemu.git;a=commitdiff;h=6cd387833d05e8ad31829d97e47