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Red Hat Product Errata RHSA-2018:2289 - Security Advisory
Issued:
2018-07-30
Updated:
2018-07-30

RHSA-2018:2289 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: qemu-kvm-rhev security update

Type/Severity

Security Advisory: Important

Topic

An update for qemu-kvm-rhev is now available for Red Hat OpenStack Platform
10.

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.

Description

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

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)

Acknowledgements:

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

Note: This is the qemu-kvm-rhev side of the CVE-2018-3639 mitigation that
includes support for guests running on hosts with AMD processors.

For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.

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

Affected Products

  • Red Hat OpenStack 10 x86_64

Fixes

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

CVEs

  • CVE-2018-3639

References

  • https://access.redhat.com/security/updates/classification/#important
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat OpenStack 10

SRPM
qemu-kvm-rhev-2.10.0-21.el7_5.4.src.rpm SHA-256: 7394d38b5b5aa84f5dcffa84bd86469b4eb3f0f9bb5ef314f55fb9b93aa86ee5
x86_64
qemu-img-rhev-2.10.0-21.el7_5.4.x86_64.rpm SHA-256: 3df36afa855d605fca0ed063cb17c5821f247c1c788a4f26b7cb705d5dd8df00
qemu-kvm-common-rhev-2.10.0-21.el7_5.4.x86_64.rpm SHA-256: fec123aa073956b5c595d1734070d0871e73863d3ca7b5f9a59eabf85d577591
qemu-kvm-rhev-2.10.0-21.el7_5.4.x86_64.rpm SHA-256: 809abace96388d691dd8ed04c8a0936f1bacc1e473681913850579d0ac73f587
qemu-kvm-rhev-debuginfo-2.10.0-21.el7_5.4.x86_64.rpm SHA-256: 802259f15e52c3ce24688d9bc92011365a6077c8521d09264c161ee21be8c9c7
qemu-kvm-tools-rhev-2.10.0-21.el7_5.4.x86_64.rpm SHA-256: bf930460411fcee2d4298d4f4e2efa23826391a652722a2115a80526175e25ba

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

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