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Red Hat Product Errata RHSA-2018:1686 - Security Advisory
Issued:
2018-05-21
Updated:
2018-05-21

RHSA-2018:1686 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: qemu-kvm-rhev security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) 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

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)

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

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.

Affected Products

  • Red Hat OpenStack 7 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
  • 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 OpenStack 7

SRPM
qemu-kvm-rhev-2.9.0-16.el7_4.17.src.rpm SHA-256: 3a25822d98b4637088e235378c1f32f5102bb001ec55dd23d674c02956ecf31b
x86_64
qemu-img-rhev-2.9.0-16.el7_4.17.x86_64.rpm SHA-256: ae18dd9e6c48f81a03e03be413cf217065e2eabb15ebd722f7f4980610641a9c
qemu-kvm-common-rhev-2.9.0-16.el7_4.17.x86_64.rpm SHA-256: b3a53a04ac170fddfbe89cb63481276c95666733fab493d588495f5826dc5e02
qemu-kvm-rhev-2.9.0-16.el7_4.17.x86_64.rpm SHA-256: bd6128700f0d3d7759707833695b738c6a6a9616dea20abe6bf323eba1beb2a5
qemu-kvm-rhev-debuginfo-2.9.0-16.el7_4.17.x86_64.rpm SHA-256: ec5b7d3264dbb36889209641a7b720916828d0ceac70474dd55972ab074a1371
qemu-kvm-tools-rhev-2.9.0-16.el7_4.17.x86_64.rpm SHA-256: 9ac8a1c3b3788edf6a94b8208fb45eec4f5970c0fe001cc8d09f96fc6c0baa2f

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

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