exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

Red Hat Security Advisory 2018-3397-01

Red Hat Security Advisory 2018-3397-01
Posted Oct 31, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-3397-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Issues addressed include a bypass vulnerability.

tags | advisory, kernel, bypass
systems | linux, redhat
advisories | CVE-2018-3639
SHA-256 | a2851ef12431e38f2637f3b12eceb255debee69dcf1812aa2b4a62bf9187e23b

Red Hat Security Advisory 2018-3397-01

Change Mirror Download
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

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

Synopsis: Important: qemu-kvm security update
Advisory ID: RHSA-2018:3397-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:3397
Issue date: 2018-10-30
CVE Names: CVE-2018-3639
====================================================================
1. Summary:

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.5
Advanced Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. 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 Server AUS (v. 6.5) - x86_64

3. Description:

Kernel-based Virtual Machine (KVM) is a full virtualization solution for
Linux on a variety of architectures. The qemu-kvm packages provide the
user-space component for running virtual machines that use KVM.

Security Fix(es):

* An industry-wide issue was found in the way many modern microprocessor
designs have implemented speculative execution of Load & Store instructions
(a commonly used performance optimization). It relies on the presence of a
precisely-defined instruction sequence in the privileged code as well as
the fact that memory read from address to which a recent memory write has
occurred may see an older value and subsequently cause an update into the
microprocessor's data cache even for speculatively executed instructions
that never actually commit (retire). As a result, an unprivileged attacker
could use this flaw to read privileged memory by conducting targeted cache
side-channel attacks. (CVE-2018-3639 virt-ssbd AMD)

Note: This is the qemu-kvm side of the CVE-2018-3639 mitigation.

Red Hat would like to thank Ken Johnson (Microsoft Security Response
Center) and Jann Horn (Google Project Zero) for reporting this issue.

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/):

1566890 - CVE-2018-3639 hw: cpu: speculative store bypass

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.5):

Source:
qemu-kvm-0.12.1.2-2.415.el6_5.19.src.rpm

x86_64:
qemu-guest-agent-0.12.1.2-2.415.el6_5.19.x86_64.rpm
qemu-img-0.12.1.2-2.415.el6_5.19.x86_64.rpm
qemu-kvm-0.12.1.2-2.415.el6_5.19.x86_64.rpm
qemu-kvm-debuginfo-0.12.1.2-2.415.el6_5.19.x86_64.rpm
qemu-kvm-tools-0.12.1.2-2.415.el6_5.19.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-2018-3639
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/ssbd

8. Contact:

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

Copyright 2018 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
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2XuX
-----END PGP SIGNATURE-----

--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce
Login or Register to add favorites

File Archive:

March 2024

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close