oss-security - CVE-2018-20124 QEMU: rdma: OOB access when building scatter-gather array

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Message-ID: <nycvar.YSQ.7.76.1812181420590.5773@xnncv>
Date: Tue, 18 Dec 2018 14:23:07 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: saar amar <saaramar5@...il.com>
Subject: CVE-2018-20124 QEMU: rdma: OOB access when building scatter-gather
 array

   Hello,

An out-of-bound stack buffer r/w access issue was found in QEMU's generic RDMA 
back-end implementation. It could occur when a driver tries to build 
scatter/gather element's array in build_host_sge_array() routine.

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/2018-12/msg02822.html

This issue was reported by Saar Amar.

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

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