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Red Hat Security Advisory
Synopsis: Important: rhev-hypervisor7 security update
Advisory ID: RHSA-2018:2404-01
Product: Red Hat Virtualization
Advisory URL: https://access.redhat.com/errata/RHSA-2018:2404
Issue date: 2018-08-15
CVE Names: CVE-2018-3620 CVE-2018-3646
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1. Summary:
An 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.
2. Relevant releases/architectures:
RHEL 7-based RHEV-H ELS – noarch
RHEV Hypervisor for RHEL-6 ELS – noarch
3. 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):
* Modern operating systems implement virtualization of physical memory to
efficiently use available system resources and provide inter-domain
protection through access control and isolation. The L1TF issue was found
in the way the x86 microprocessor designs have implemented speculative
execution of instructions (a commonly used performance optimisation) in
combination with handling of page-faults caused by terminated virtual to
physical address resolving process. As a result, an unprivileged attacker
could use this flaw to read privileged memory of the kernel or other
processes and/or cross guest/host boundaries to read host memory by
conducting targeted cache side-channel attacks. (CVE-2018-3620,
CVE-2018-3646)
Red Hat would like to thank Intel OSSIRT (Intel.com) for reporting these
issues.
4. Solution:
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/2974891
5. Bugs fixed (https://bugzilla.redhat.com/):
1585005 – CVE-2018-3646 CVE-2018-3620 Kernel: hw: cpu: L1 terminal fault (L1TF)
1614065 – [Tracker] Tracking bug for RHEV-H 3.6.13 respin
6. Package List:
RHEV Hypervisor for RHEL-6 ELS:
Source:
rhev-hypervisor7-7.3-20180813.0.el6ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20180813.0.el6ev.noarch.rpm
RHEL 7-based RHEV-H ELS:
Source:
rhev-hypervisor7-7.3-20180813.0.el7ev.src.rpm
noarch:
rhev-hypervisor7-7.3-20180813.0.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/
7. References:
https://access.redhat.com/security/cve/CVE-2018-3620
https://access.redhat.com/security/cve/CVE-2018-3646
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/security/vulnerabilities/L1TF
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2018 Red Hat, Inc.
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