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Bug 1334384 - (CVE-2016-4952) CVE-2016-4952 Qemu: scsi: pvscsi: out-of-bounds access issue in pvsci_ring_init_msg/data routines
CVE-2016-4952 Qemu: scsi: pvscsi: out-of-bounds access issue in pvsci_ring_in...
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=20160523,repor...
: Security
: 1334392 (view as bug list)
Depends On: 1338736
Blocks: 1334395
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Reported: 2016-05-09 09:33 EDT by Andrej Nemec
Modified: 2018-07-18 10:53 EDT (History)
36 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Quick Emulator(Qemu) built with the VMWARE PVSCSI paravirtual SCSI bus emulation support is vulnerable to an OOB r/w access issue. It could occur while processing SCSI commands 'PVSCSI_CMD_SETUP_RINGS' or 'PVSCSI_CMD_SETUP_MSG_RING'. A privileged user inside guest could use this flaw to crash the Qemu process resulting in DoS.
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Clone Of:
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Last Closed:
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CRM:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

Attachments (Terms of Use)
Crash report (2.16 KB, text/plain)
2016-05-09 09:37 EDT, Andrej Nemec 		no flags Details
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Description Andrej Nemec 2016-05-09 09:33:02 EDT 
Quick Emulator(Qemu) built with the VMWARE PVSCSI paravirtual SCSI bus emulation support is vulnerable to an OOB r/w access issue. It could occur while processing SCSI commands 'PVSCSI_CMD_SETUP_RINGS' or 'PVSCSI_CMD_SETUP_MSG_RING'.

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/2016-05/msg03774.html

Reference:
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  -> http://www.openwall.com/lists/oss-security/2016/05/23/1
Comment 1 Andrej Nemec 2016-05-09 09:33:18 EDT 
Acknowledgments:

Name: Li Qiang (Qihoo 360 Inc.)
Comment 2 Andrej Nemec 2016-05-09 09:37 EDT 
Created attachment 1155326 [details]
Crash report
Comment 6 Prasad J Pandit 2016-05-23 06:50:53 EDT 
*** Bug 1334392 has been marked as a duplicate of this bug. ***
Comment 7 Prasad J Pandit 2016-05-23 07:05:00 EDT 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1338736]
Comment 8 Fedora Update System 2016-06-25 15:23:59 EDT 
qemu-2.6.0-4.fc24 has been pushed to the Fedora 24 stable repository. If problems still persist, please make note of it in this bug report.
Comment 9 Fedora Update System 2016-07-02 15:23:45 EDT 
qemu-2.3.1-16.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.
Comment 10 Fedora Update System 2016-07-02 15:29:03 EDT 
qemu-2.4.1-11.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report.
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