oss-security - CVE Request Qemu: virtio: infinite loop in virtqueue

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Message-ID: <alpine.LFD.2.20.1607281725190.28945@wniryva>
Date: Thu, 28 Jul 2016 17:31:12 +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: virtio: infinite loop in virtqueue_pop

   Hello,

Quick emulator(Qemu) built with the virtio framework is vulnerable to an 
infinite loop issue. It could occur if the guest was to set the I/O descriptor 
buffer length to be zero. A privileged user inside guest could use this flaw 
to potentially crash the Qemu instance on the host resulting in DoS.

Upstream fix:
-------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg06246.html

This issue was discovered by 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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