Bug 584514 – <app-emulation/qemu-2.7.0: display: vmsvga: infinite loop in vmsvga_fifo_run() routine (CVE-2016-{4453,4454})

• Status: RESOLVED FIXED
• Product: Gentoo Security

[Description Agostino Sarubbo 2016-05-30 08:57:51 UTC]

From ${URL} :

Quick Emulator(Qemu) built with the VMware-SVGA "chipset" emulation support is 
vulnerable to an infinite loop issue. It could occur while processing VGA 
commands via its FIFO buffer.

A privileged user inside guest could use this flaw to crash the Qemu process 
resulting in DoS.

Upstream patch
--------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2016-05/msg05270.html

Reference:
----------
   -> https://bugzilla.redhat.com/show_bug.cgi?id=1336650

This issue was discovered and reported by Li Qiang of 360.cn Inc. 
CVE-2016-4453 is assigned by Red Hat Inc.


@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 GLSAMaker/CVETool Bot 2016-06-30 23:57:32 UTC]

CVE-2016-4454 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4454):
  The vmsvga_fifo_read_raw function in hw/display/vmware_vga.c in QEMU allows
  local guest OS administrators to obtain sensitive host memory information or
  cause a denial of service (QEMU process crash) by changing FIFO registers
  and issuing a VGA command, which triggers an out-of-bounds read.

CVE-2016-4453 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4453):
  The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allows local
  guest OS administrators to cause a denial of service (infinite loop and QEMU
  process crash) via a VGA command.

[Comment 2 Aaron Bauman (RETIRED) 2016-07-01 00:01:14 UTC]

(In reply to GLSAMaker/CVETool Bot from comment #1)
> CVE-2016-4454 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4454):
>   The vmsvga_fifo_read_raw function in hw/display/vmware_vga.c in QEMU allows
>   local guest OS administrators to obtain sensitive host memory information
> or
>   cause a denial of service (QEMU process crash) by changing FIFO registers
>   and issuing a VGA command, which triggers an out-of-bounds read.
> 

http://git.qemu.org/?p=qemu.git;a=commit;h=521360267876d3b6518b328051a2e56bca55bef8

> CVE-2016-4453 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2016-4453):
>   The vmsvga_fifo_run function in hw/display/vmware_vga.c in QEMU allows
> local
>   guest OS administrators to cause a denial of service (infinite loop and
> QEMU
>   process crash) via a VGA command.


http://git.qemu.org/?p=qemu.git;a=commit;h=4e68a0ee17dad7b8d870df0081d4ab2e079016c2

[Comment 3 Matthias Maier 2016-09-05 05:43:23 UTC]

Fixed in at least version 2.7.0. Stabilization of 2.7.0 in #592430

commit 671df1de7a8611d59307ffcd448af451c15003ed
Author: Matthias Maier <[e-mail]>
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 4 Yury German 2016-09-25 22:56:29 UTC]

Arches and Maintainer(s), Thank you for your work.
Added to an existing GLSA Request.

[Comment 5 GLSAMaker/CVETool Bot 2016-09-26 00:37:27 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).