Bug 1333425 (CVE-2016-8576)

Summary: CVE-2016-8576 Qemu: usb: xHCI: infinite loop vulnerability in xhci_ring_fetch
Product: [Other] Security Response Reporter: Adam Mariš <amaris>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED WONTFIX QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: abaron, ailan, alonbl, aortega, apevec, areis, bmcclain, chrisw, crobinso, dblechte, drjones, eedri, gmollett, imammedo, jen, jschluet, knoel, lhh, lpeer, markmc, mgoldboi, michal.skrivanek, mkenneth, mrezanin, mst, pbonzini, ppandit, rbalakri, rbryant, rkrcmar, sclewis, security-response-team, srevivo, tdecacqu, vkuznets, ykaul, ylavi
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2018-01-16 10:24:57 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: 1382322, 1382323, 1476049, 1476068, 1476069, 1476072, 1476074, 1476077    
Bug Blocks: 1326713    
Attachments:
Description Flags
Backtrace report none

Description Adam Mariš 2016-05-05 13:18:27 UTC 
Quick Emulator(Qemu) built with the USB xHCI controller emulation support is vulnerable to an infinite loop issue. It could occur while processing
USB command ring in 'xhci_ring_fetch'.

A privileged user/process inside guest could use this issue to crash the Qemu process on the host leading to DoS.

Upstream patch
--------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg01265.html
Comment 1 Adam Mariš 2016-05-05 13:18:31 UTC 
Acknowledgments:

Name: Li Qiang (Qihoo 360)
Comment 3 Adam Mariš 2016-05-05 13:23:47 UTC 
Created attachment 1154206 [details]
Backtrace report
Comment 4 Prasad Pandit 2016-10-06 11:08:45 UTC 
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1382323]
Comment 5 Prasad Pandit 2016-10-06 11:09:03 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1382322]
Comment 6 Cole Robinson 2016-10-16 00:22:51 UTC 
I think this ended up as:

commit 05f43d44e4bc26611ce25fd7d726e483f73363ce
Author: Gerd Hoffmann <kraxel>
Date:   Mon Oct 10 12:46:22 2016 +0200

    xhci: limit the number of link trbs we are willing to process
Comment 7 errata-xmlrpc 2017-08-02 00:55:39 UTC 
This issue has been addressed in the following products:

  Red Hat OpenStack Platform 10.0 (Newton)
  Red Hat OpenStack Platform 11.0 (Ocata)
  Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7
  Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7
  Red Hat OpenStack Platform 8.0 (Liberty)
  Red Hat OpenStack Platform 9.0 (Mitaka)

Via RHSA-2017:2408 https://access.redhat.com/errata/RHSA-2017:2408
Comment 8 errata-xmlrpc 2017-08-02 04:44:18 UTC 
This issue has been addressed in the following products:

  RHEV 4.X RHEV-H and Agents for RHEL-7

Via RHSA-2017:2392 https://access.redhat.com/errata/RHSA-2017:2392