oss-security - CVE request: Qemu: scsi: pvscsi: out-of-bounds access issue in pvsci_ring_init

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Message-ID: <alpine.LFD.2.20.1605231637460.27295@wniryva>
Date: Mon, 23 May 2016 16:40:22 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Li Qiang <liqiang6-s@....cn>
Subject: CVE request: Qemu: scsi: pvscsi: out-of-bounds access issue in
 pvsci_ring_init_msg/data routines

   Hello,

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

This issue was discovered by Mr Li Qiang of 360.cn Inc.

Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F

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