Bug 1382668 (CVE-2016-7995)

Summary: CVE-2016-7995 Qemu: usb: hcd-ehci: memory leak in ehci_process_itd
Product: [Other] Security Response Reporter: Prasad J 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, 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 02:59:50 UTC Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1382669    
Bug Blocks: 1382469    

Description Prasad J Pandit 2016-10-07 11:03:57 UTC
Qemu emulator(Qemu) built with the USB EHCI emulation support is vulnerable
to a memory leakage flaw. It could occur while processing isochronous transfer
descriptors(iTD), with buffer page select(PG) index that falls beyond buffer
page array area.

A privileged user inside guest could use this flaw to leak Qemu memory bytes
leading to a DoS on the host.

Upstream fix:
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  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg06609.html

Comment 1 Prasad J Pandit 2016-10-07 11:04:28 UTC
Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad J Pandit 2016-10-07 11:06:29 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1382669]