oss-security - CVE-2018-20125 QEMU: pvrdma: null dereference or excessive memory allocation when creating QP/CQ

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Message-ID: <nycvar.YSQ.7.76.1812191250250.14650@xnncv>
Date: Wed, 19 Dec 2018 12:52:06 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Li Qiang <liq3ea@....com>
Subject: CVE-2018-20125 QEMU: pvrdma: null dereference or excessive memory
 allocation when creating QP/CQ

   Hello,

A Null pointer dereference issue was found in QEMU's implementation of 
VMWare's paravirtual RDMA device. It could occur while creating CQ/QP ring 
objects in pvrdma_ring_init() routine.

A guest user/process could use this flaw to crash QEMU process or allocate 
excessive memory on host resulting in DoS.

Upstream patch:
---------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2018-12/msg02823.html

This issue was reported by Li Qiang.

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

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