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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: VulnerabilitiesAssignee: 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 gentoo-dev 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).