Bug 1334384 (CVE-2016-4952) - CVE-2016-4952 Qemu: scsi: pvscsi: out-of-bounds access issue in pvsci_ring_init_msg/data routines
Summary: CVE-2016-4952 Qemu: scsi: pvscsi: out-of-bounds access issue in pvsci_ring_in...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2016-4952
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
: 1334392 (view as bug list)
Depends On: 1338736
Blocks: 1334395
TreeView+ depends on / blocked
 
Reported: 2016-05-09 13:33 UTC by Andrej Nemec
Modified: 2021-02-17 03:54 UTC (History)
29 users (show)

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.
Clone Of:
Environment:
Last Closed: 2019-06-08 02:51:26 UTC
Embargoed:

Attachments (Terms of Use)
Crash report (2.16 KB, text/plain)
2016-05-09 13:37 UTC, Andrej Nemec 		no flags Details
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Description Andrej Nemec 2016-05-09 13:33:02 UTC 
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:
----------
  -> http://www.openwall.com/lists/oss-security/2016/05/23/1
Comment 1 Andrej Nemec 2016-05-09 13:33:18 UTC 
Acknowledgments:

Name: Li Qiang (Qihoo 360 Inc.)
Comment 2 Andrej Nemec 2016-05-09 13:37:16 UTC 
Created attachment 1155326 [details]
Crash report
Comment 6 Prasad Pandit 2016-05-23 10:50:53 UTC 
*** Bug 1334392 has been marked as a duplicate of this bug. ***
Comment 7 Prasad Pandit 2016-05-23 11:05:00 UTC 
Created qemu tracking bugs for this issue:

Affects: fedora-all [bug 1338736]
Comment 8 Fedora Update System 2016-06-25 19:23:59 UTC 
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 19:23:45 UTC 
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 19:29:03 UTC 
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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