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Date: Thu, 8 Mar 2018 23:52:33 +0530 (IST)
From: P J P <ppandit@...hat.com>
To: oss security list <oss-security@...ts.openwall.com>
cc: Cyrille Chatras <cyrille.chatras@...nge.com>
Subject: CVE-2018-7550 Qemu: i386: multiboot OOB access while loading kernel
 image

   Hello,

Quick Emulator(QEMU) built with the PC System Emulator with multiboot feature 
support is vulnerable to an OOB r/w memory access issue. It could occur while 
loading a kernel image during a guest boot if multiboot head addresses 
mh_load_end_addr was greater than mh_bss_end_addr.

A user/process could use this flaw to potentially achieve arbitrary code 
execution on a host.

Upstream patch:
---------------
   -> https://lists.nongnu.org/archive/html/qemu-devel/2018-03/msg01885.html

This issue was reported by Cyrille Chatras of Orange.com.

CVE-2018-7550 assigned via -> https://cveform.mitre.org/

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

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