oss-security - CVE-2018-18954 QEMU: ppc64: Out-of-bounds r/w stack access in pnv_lpc_do

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Message-ID: <nycvar.YSQ.7.76.1811070031000.15644@xnncv>
Date: Wed, 7 Nov 2018 00:33:03 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: moguofang@...wei.com
Subject: CVE-2018-18954 QEMU: ppc64: Out-of-bounds r/w stack access in
 pnv_lpc_do_eccb

   Hello,

An OOB r/w buffer access issue was found in the PowerPC PowerNV LPC controller 
in 'pnv_lpc_do_eccb' routine. It could occur while performing a memory write 
operation. A guest user/process could use this flaw to crash the QEMU process 
resulting in DoS.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg00446.html

This issue was reported by Moguofang of Huawei.com.

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

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