RHEL 6 / 7 : Virtualization (RHSA-2018:2246) (Spectre)
Medium Nessus Plugin ID 111342
SynopsisThe remote Red Hat host is missing a security update.
DescriptionAn update for rhev-hypervisor7 is now available for RHEV 3.X
Hypervisor and Agents 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.
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, x86 AMD)
Red Hat would like to thank Ken Johnson (Microsoft Security Response
Center) and Jann Horn (Google Project Zero) for reporting this issue.
SolutionUpdate the affected rhev-hypervisor7 package.