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Bug 1373462 - (CVE-2016-7155) CVE-2016-7155 Qemu: scsi: pvscsi: OOB read and infinite loop while setting descriptor rings
CVE-2016-7155 Qemu: scsi: pvscsi: OOB read and infinite loop while setting de...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20160831,repor...
: Security
Depends On: 1373463
Blocks: 1367956
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Reported: 2016-09-06 06:56 EDT by Prasad J Pandit
Modified: 2018-07-18 11:00 EDT (History)
36 users (show)

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Description Prasad J Pandit 2016-09-06 06:56:39 EDT 
Quick Emulator(Qemu) built with the VMWARE PVSCSI paravirtual SCSI bus
emulation support is vulnerable to an OOB access and/or infinite loop issue.
It could occur while processing SCSI commands 'PVSCSI_CMD_SETUP_RINGS'.

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/msg00050.html

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/09/06/2
Comment 1 Prasad J Pandit 2016-09-06 06:57:12 EDT 
Acknowledgments:

Name: Li Qiang (360.cn Inc.), Victor V (360.cn Inc.)
Comment 2 Prasad J Pandit 2016-09-06 06:58:19 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1373463]
Comment 3 Cole Robinson 2016-10-15 19:21:07 EDT 
commit 7f61f4690dd153be98900a2a508b88989e692753
Author: Prasad J Pandit <pjp@fedoraproject.org>
Date:   Wed Aug 31 12:19:29 2016 +0530

    vmw_pvscsi: check page count while initialising descriptor rings
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