Synopsis: Important: libvirt security and bug fix update
Advisory ID: SLSA-2018:1997-1
Issue Date: 2018-06-26
CVE Numbers: CVE-2018-3639
--
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 libvirt side of the CVE-2018-3639 mitigation that
includes support for guests running on hosts with AMD processors.
Bug Fix(es):
* Previously, the virtlogd service logged redundant AVC denial errors when
a guest virtual machine was started. With this update, the virtlogd
service no longer attempts to send shutdown inhibition calls to systemd,
which prevents the described errors from occurring.
* Prior to this update, guest virtual machine actions that use a python
library in some cases failed and "Hash operation not allowed during
iteration" error messages were logged. Several redundant thread access
checks have been removed, and the problem no longer occurs.
* The "virsh capabilities" command previously displayed an inaccurate
number of 4 KiB memory pages on systems with very large amounts of memory.
This update optimizes the memory diagnostic mechanism to ensure memory
page numbers are displayed correctly on such systems.
--
SL7
x86_64
libvirt-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-client-3.9.0-14.el7_5.6.i686.rpm
libvirt-client-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-config-network-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-config-nwfilter-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-interface-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-lxc-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-network-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-nodedev-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-nwfilter-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-qemu-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-secret-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-core-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-disk-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-gluster-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-iscsi-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-logical-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-mpath-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-rbd-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-driver-storage-scsi-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-kvm-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-debuginfo-3.9.0-14.el7_5.6.i686.rpm
libvirt-debuginfo-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-libs-3.9.0-14.el7_5.6.i686.rpm
libvirt-libs-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-admin-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-daemon-lxc-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-devel-3.9.0-14.el7_5.6.i686.rpm
libvirt-devel-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-docs-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-lock-sanlock-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-login-shell-3.9.0-14.el7_5.6.x86_64.rpm
libvirt-nss-3.9.0-14.el7_5.6.i686.rpm
libvirt-nss-3.9.0-14.el7_5.6.x86_64.rpm
- Scientific Linux Development Team
