Bug 618808 (CVE-2017-7493)

Summary:	<app-emulation/qemu-2.9.0-r2: improper access control issue in VirtFS
Product:	Gentoo Security	Reporter:	Michael Boyle <boylemic>
Component:	Vulnerabilities	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	major	CC:	qemu+disabled
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	http://www.openwall.com/lists/oss-security/2017/05/17/6 https://bugzilla.redhat.com/show_bug.cgi?id=1451709
Whiteboard:	B2 [glsa cve]
Package list:		Runtime testing required:	---
Bug Depends on:	616874
Bug Blocks:

Description Michael Boyle 2017-05-18 02:21:37 UTC

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing virtfs metadata files in mapped-file security mode. A guest user could use this flaw to escalate their privileges inside guest.

Comment 1 Matthias Maier gentoo-dev

2017-05-18 04:23:16 UTC

Fixed in >=app-emulation/qemu-2.9.0-r2.
Vulnerable version left in tree app-emulation/qemu-2.8.1-r2

commit 33cfc7b69e6a25e0b66687e28f7b29ae1a43e2d4
Author: Matthias Maier <tamiko@gentoo.org>
Date:   Wed May 17 23:08:31 2017 -0500

    app-emulation/qemu: patch for CVE-2017-7493, bug #618808
    
    Package-Manager: Portage-2.3.5, Repoman-2.3.2

Comment 2 Yury German Gentoo Infrastructure

2017-05-21 07:47:53 UTC

Added to an existing GLSA Request.

Comment 3 GLSAMaker/CVETool Bot gentoo-dev

2017-06-06 06:50:44 UTC

This issue was resolved and addressed in
 GLSA 201706-03 at https://security.gentoo.org/glsa/201706-03
by GLSA coordinator Yury German (BlueKnight).