Exploit the possiblities

Red Hat Security Advisory 2017-0083-01

Red Hat Security Advisory 2017-0083-01
Posted Jan 18, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-0083-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM. Security Fix: An out-of-bounds read-access flaw was found in the QEMU emulator built with IP checksum routines. The flaw could occur when computing a TCP/UDP packet's checksum, because a QEMU function used the packet's payload length without checking against the data buffer's size. A user inside a guest could use this flaw to crash the QEMU process.

tags | advisory, kernel, udp, tcp
systems | linux, redhat
advisories | CVE-2016-2857
MD5 | d1a919a428bdfe7e98f8acfb538b52ca

Red Hat Security Advisory 2017-0083-01

Change Mirror Download

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
Red Hat Security Advisory

Synopsis: Low: qemu-kvm security and bug fix update
Advisory ID: RHSA-2017:0083-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0083.html
Issue date: 2017-01-17
CVE Names: CVE-2016-2857
=====================================================================

1. Summary:

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Low. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

Kernel-based Virtual Machine (KVM) is a full virtualization solution for
Linux on AMD64 and Intel 64 systems. The qemu-kvm packages provide the
user-space component for running virtual machines using KVM.

Security Fix(es):

* An out-of-bounds read-access flaw was found in the QEMU emulator built
with IP checksum routines. The flaw could occur when computing a TCP/UDP
packet's checksum, because a QEMU function used the packet's payload length
without checking against the data buffer's size. A user inside a guest
could use this flaw to crash the QEMU process (denial of service).
(CVE-2016-2857)

Red Hat would like to thank Ling Liu (Qihoo 360 Inc.) for reporting this
issue.

Bug Fix(es):

* Previously, rebooting a guest virtual machine more than 128 times in a
short period of time caused the guest to shut down instead of rebooting,
because the virtqueue was not cleaned properly. This update ensures that
the virtqueue is cleaned more reliably, which prevents the described
problem from occurring. (BZ#1393484)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

After installing this update, shut down all running virtual machines. Once
all virtual machines have shut down, start them again for this update to
take effect.

5. Bugs fixed (https://bugzilla.redhat.com/):

1296567 - CVE-2016-2857 Qemu: net: out of bounds read in net_checksum_calculate()

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
qemu-kvm-1.5.3-126.el7_3.3.src.rpm

x86_64:
qemu-img-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

Source:
qemu-kvm-1.5.3-126.el7_3.3.src.rpm

x86_64:
qemu-img-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
qemu-kvm-1.5.3-126.el7_3.3.src.rpm

ppc64:
qemu-img-1.5.3-126.el7_3.3.ppc64.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64.rpm

ppc64le:
qemu-img-1.5.3-126.el7_3.3.ppc64le.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.ppc64le.rpm

x86_64:
qemu-img-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
qemu-kvm-1.5.3-126.el7_3.3.src.rpm

x86_64:
qemu-img-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-common-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-debuginfo-1.5.3-126.el7_3.3.x86_64.rpm
qemu-kvm-tools-1.5.3-126.el7_3.3.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-2857
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/security/updates/classification/#Low

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2017 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iD8DBQFYfm4IXlSAg2UNWIIRAqo2AKDBcem0HhMfiKIYWKl1mnXrIt1PhACfbk51
gD9g89JnjAZCvGffEdEMDsQ=
=FCGV
-----END PGP SIGNATURE-----


--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

Want To Donate?


Bitcoin: 18PFeCVLwpmaBuQqd5xAYZ8bZdvbyEWMmU

File Archive:

January 2018

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Jan 1st
    2 Files
  • 2
    Jan 2nd
    13 Files
  • 3
    Jan 3rd
    16 Files
  • 4
    Jan 4th
    39 Files
  • 5
    Jan 5th
    26 Files
  • 6
    Jan 6th
    40 Files
  • 7
    Jan 7th
    2 Files
  • 8
    Jan 8th
    16 Files
  • 9
    Jan 9th
    25 Files
  • 10
    Jan 10th
    28 Files
  • 11
    Jan 11th
    44 Files
  • 12
    Jan 12th
    32 Files
  • 13
    Jan 13th
    2 Files
  • 14
    Jan 14th
    4 Files
  • 15
    Jan 15th
    31 Files
  • 16
    Jan 16th
    15 Files
  • 17
    Jan 17th
    16 Files
  • 18
    Jan 18th
    24 Files
  • 19
    Jan 19th
    7 Files
  • 20
    Jan 20th
    0 Files
  • 21
    Jan 21st
    0 Files
  • 22
    Jan 22nd
    0 Files
  • 23
    Jan 23rd
    0 Files
  • 24
    Jan 24th
    0 Files
  • 25
    Jan 25th
    0 Files
  • 26
    Jan 26th
    0 Files
  • 27
    Jan 27th
    0 Files
  • 28
    Jan 28th
    0 Files
  • 29
    Jan 29th
    0 Files
  • 30
    Jan 30th
    0 Files
  • 31
    Jan 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close