RedHat: RHSA-2018-1711:01 Important: rhev-hypervisor7 security update
Summary
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.
Summary
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
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
Package List
RHEV Hypervisor for RHEL-6 ELS:
Source:
rhev-hypervisor7-7.3-20180521.1.el6ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20180521.1.el6ev.noarch.rpm
RHEL 7-based RHEV-H ELS:
Source:
rhev-hypervisor7-7.3-20180521.1.el7ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20180521.1.el7ev.noarch.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/
Topic
An update for rhev-hypervisor7 is now available for RHEV 3.X Hypervisor andAgents Extended Lifecycle Support for Red Hat Enterprise Linux 6 and RHEV3.X Hypervisor and Agents Extended Lifecycle Support for Red Hat EnterpriseLinux 7.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
Relevant Releases Architectures
RHEL 7-based RHEV-H ELS - noarch
RHEV Hypervisor for RHEL-6 ELS - noarch
Bugs Fixed
1566890 - CVE-2018-3639 hw: cpu: speculative store bypass
