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Bug 592430 (CVE-2016-7116)

Summary: <app-emulation/qemu-2.7.0: 9p: directory traversal flaw in 9p virtio backend (CVE-2016-7116)
Product: Gentoo Security Reporter: Agostino Sarubbo <ago>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Status: RESOLVED FIXED    
Severity: minor CC: kilburna, qemu+disabled
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
URL: http://www.openwall.com/lists/oss-security/2016/08/30/1
Whiteboard: B4 [glsa cve]
Package list:
Runtime testing required: ---
Bug Depends on:    
Bug Blocks: 579734, 583496, 583952, 584094, 584102, 584146, 584514, 584630, 584918, 589924, 589928, 591244, 591374, 591380, 591678    

Description Agostino Sarubbo gentoo-dev 2016-08-30 13:24:43 UTC
From ${URL} :

Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 
File System(9pfs) support, is vulnerable to a directory/path traversal issue. 
It could occur while creating or accessing files on a shared host directory.

A privileged user inside guest could use this flaw to access undue files on 
the host.

Upstream patches:
-----------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2016-08/msg03917.html

Reference:
----------
   -> http://wiki.qemu.org/Documentation/9psetup

This flaw was reported by Mr Felix Wilhelm.


@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 1 Matthew Thode ( prometheanfire ) archtester Gentoo Infrastructure gentoo-dev Security 2016-09-04 17:16:39 UTC
well, the patches apply to at least 2.6.0, but technically I'm not allow to apply them to the ebuild, so...
Comment 2 Matthias Maier gentoo-dev 2016-09-05 05:59:35 UTC
Fixed in at least version 2.7.0. Stabilization of 2.7.0 in #592430

commit 671df1de7a8611d59307ffcd448af451c15003ed
Author: Matthias Maier <tamiko@gentoo.org>
Date:   Sun Sep 4 23:25:32 2016 -0500

    app-emulation/qemu: version bump to 2.7.0, various security fixes
    
    3af9187fc6caaf415ab9c0c6d92c9678f65cb17f -> CVE-2016-4001, bug #579734
    3a15cc0e1ee7168db0782133d2607a6bfa422d66 -> CVE-2016-4002, bug #579734
    c98c6c105f66f05aa0b7c1d2a4a3f716450907ef -> CVE-2016-4439, bug #583496
    6c1fef6b59563cc415f21e03f81539ed4b33ad90 -> CVE-2016-4441, bug #583496
    06630554ccbdd25780aa03c3548aaff1eb56dffd ->              , bug #583952
    844864fbae66935951529408831c2f22367a57b6 -> CVE-2016-5337, bug #584094
    b60bdd1f1ee1616b7a9aeeffb4088e1ce2710fb2 ->              , bug #584102
    1b85898025c4cd95dce673d15e67e60e98e91731 ->              , bug #584146
    521360267876d3b6518b328051a2e56bca55bef8 -> CVE-2016-4453, bug #584514
    4e68a0ee17dad7b8d870df0081d4ab2e079016c2 -> CVE-2016-4454, bug #584514
    a6b3167fa0e825aebb5a7cd8b437b6d41584a196 -> CVE-2016-5126, bug #584630
    ff589551c8e8e9e95e211b9d8daafb4ed39f1aec -> CVE-2016-5338, bug #584918
    d3cdc49138c30be1d3c2f83d18f85d9fdee95f1a -> CVE-2016-5238, bug #584918
    1e7aed70144b4673fc26e73062064b6724795e5f ->              , bug #589924
    afd9096eb1882f23929f5b5c177898ed231bac66 -> CVE-2016-5403, bug #589928
    eb700029c7836798046191d62d595363d92c84d4 -> CVE-2016-6835, bug #591244
    ead315e43ea0c2ca3491209c6c8db8ce3f2bbe05 -> CVE-2016-6834, bug #591374
    6c352ca9b4ee3e1e286ea9e8434bd8e69ac7d0d8 -> CVE-2016-6833, bug #591380
    47882fa4975bf0b58dd74474329fdd7154e8f04c -> CVE-2016-6888, bug #591678
    
    805b5d98c649d26fc44d2d7755a97f18e62b438a
    56f101ecce0eafd09e2daf1c4eeb1377d6959261
    fff39a7ad09da07ef490de05c92c91f22f8002f2 ->              , bug #592430
    
    Package-Manager: portage-2.2.28
Comment 3 Matthias Maier gentoo-dev 2016-09-05 06:18:14 UTC
Fixed in: app-emulation/qemu-2.7.0
Vulnerable version left in tree: app-emulation/qemu-2.5.1

Arches, please test and mark stable
 =app-emulation/qemu-2.7.0

Target-keywords: "amd64 x86"
Comment 4 Matthias Maier gentoo-dev 2016-09-05 06:25:57 UTC
*** Bug 586430 has been marked as a duplicate of this bug. ***
Comment 5 Agostino Sarubbo gentoo-dev 2016-09-05 16:10:45 UTC
amd64 stable
Comment 6 Agostino Sarubbo gentoo-dev 2016-09-05 16:11:39 UTC
x86 stable.

Maintainer(s), please cleanup.
Comment 7 Matthias Maier gentoo-dev 2016-09-05 16:46:31 UTC
Thank you very much!

commit fd20fa64ab7026533a5e4c554697cc4bcab9e7ef
Author: Matthias Maier <tamiko@gentoo.org>
Date:   Mon Sep 5 11:42:22 2016 -0500

    app-emulation/qemu: drop vulnerable 2.5.1, bug #592430, and 19 others
    
    Package-Manager: portage-2.2.28
Comment 8 Yury German Gentoo Infrastructure gentoo-dev 2016-09-10 02:12:23 UTC
Added to an existing GLSA Request.
Comment 9 GLSAMaker/CVETool Bot gentoo-dev 2016-09-26 00:38:45 UTC
This issue was resolved and addressed in
 GLSA 201609-01 at https://security.gentoo.org/glsa/201609-01
by GLSA coordinator Yury German (BlueKnight).