Bug 1373478 (CVE-2016-7156) - CVE-2016-7156 Qemu: scsi: pvscsi: infintie loop when building SG list
Summary: CVE-2016-7156 Qemu: scsi: pvscsi: infintie loop when building SG list
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-7156
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1373480
Blocks: 1365912
TreeView+ depends on / blocked
 
Reported: 2016-09-06 11:44 UTC by Prasad J Pandit
Modified: 2019-09-29 13:55 UTC (History)
36 users (show)

Fixed In Version:
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Last Closed: 2019-06-08 02:58:17 UTC


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Description Prasad J Pandit 2016-09-06 11:44:27 UTC
Quick Emulator(Qemu) built with the VMWARE PVSCSI paravirtual SCSI bus
emulation support is vulnerable to an infinite loop issue. It could occur
while processing an IO request descriptor, building SG list.

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

Upstream patch:
---------------
  -> https://lists.gnu.org/archive/html/qemu-devel/2016-09/msg00772.html

Comment 1 Prasad J Pandit 2016-09-06 11:44:33 UTC
Acknowledgments:

Name: Li Qiang (360.cn Inc.)

Comment 2 Prasad J Pandit 2016-09-06 11:46:08 UTC
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1373480]

Comment 3 Cole Robinson 2016-10-15 23:48:58 UTC
I think this ended up as

commit 49adc5d3f8c6bb75e55ebfeab109c5c37dea65e8
Author: Prasad J Pandit <pjp@fedoraproject.org>
Date:   Tue Sep 6 02:20:43 2016 +0530

    scsi: pvscsi: limit loop to fetch SG list


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