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Red Hat Product Errata RHSA-2018:1711 - Security Advisory
Issued:
2018-05-23
Updated:
2018-05-23

RHSA-2018:1711 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: rhev-hypervisor7 security update

Type/Severity

Security Advisory: Important

Topic

An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 6 and RHEV 3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat Enterprise Linux 7.

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

The rhev-hypervisor7 package provides a Red Hat Enterprise Virtualization Hypervisor ISO disk image. The Red Hat Enterprise Virtualization Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor. It includes everything necessary to run and manage virtual machines: A subset of the Red Hat Enterprise Linux operating environment and the Red Hat Enterprise Virtualization Agent.

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)

Note: This is the rhev-hypervisor7 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.

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 Virtualization - ELS 7 x86_64
  • Red Hat Virtualization - ELS 6 x86_64

Fixes

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

CVEs

  • CVE-2018-1087
  • CVE-2018-3639
  • CVE-2018-8897

References

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

Red Hat Virtualization - ELS 7

SRPM
rhev-hypervisor7-7.3-20180521.1.el7ev.src.rpm SHA-256: 24c8e52f56827d5a08573184d38feb4e83495d652cbf70328da01441132ae4f2
x86_64
rhev-hypervisor7-7.3-20180521.1.el7ev.noarch.rpm SHA-256: e3d864268f5a6dd3fe69ef686a6b76dd53a6b4afec237b42838494c9a243a118

Red Hat Virtualization - ELS 6

SRPM
rhev-hypervisor7-7.3-20180521.1.el6ev.src.rpm SHA-256: 33256f3f4f28aa7d8e55861ea9f66d61d8ff3dcb083d6fca0e2390e1d07cd439
x86_64
rhev-hypervisor7-7.3-20180521.1.el6ev.noarch.rpm SHA-256: b7b66da03e699042e85772e83b19f91c77efa56f037e5812f1f3a788c65503fd

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

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