oss-security - CVE Request Qemu: scsi: esp: OOB write when using non-DMA mode in get

Follow @Openwall on Twitter for new release announcements and other news

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <alpine.LFD.2.20.1606021054530.24989@wniryva>
Date: Thu, 2 Jun 2016 10:56:53 +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: esp: OOB write when using non-DMA mode in
 get_cmd

   Hello,

Quick Emulator(Qemu) built with the ESP/NCR53C9x controller emulation support 
is vulnerable to an OOB write access issue. The controller uses 16-byte FIFO 
buffer for command and information transfer. The OOB write occurs while 
reading from information transfer buffer via non-DMA mode in routine 
get_cmd().

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/2016-06/msg00150.html

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1341931

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

Please check out the Open Source Software Security Wiki, which is counterpart to this mailing list.

Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages.