Issued:
2018-01-05
Updated:
2018-01-05

RHSA-2018:0048 - Security Advisory

Synopsis

Important: vdsm security update

Type/Severity

Security Advisory: Important

Topic

An update for vdsm is now available for RHEV 3.X Hypervisor and Agents for Red Hat Enterprise Linux 7 ELS.

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

The VDSM service is required by a Virtualization Manager to manage the Linux hosts. VDSM manages and monitors the host's storage, memory and networks as well as virtual machine creation, other host administration tasks, statistics gathering, and log collection.

Security Fix(es):

  • An industry-wide issue was found in the way many modern microprocessor designs have implemented speculative execution of instructions (a commonly used performance optimization). There are three primary variants of the issue which differ in the way the speculative execution can be exploited. Variant CVE-2017-5715 triggers the speculative execution by utilizing branch target injection. It relies on the presence of a precisely-defined instruction sequence in the privileged code as well as the fact that memory accesses may cause allocation 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 cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks. (CVE-2017-5715)

Note: This is the vdsm side of the CVE-2017-5715 mitigation.

Red Hat would like to thank 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

Affected Products

  • Red Hat Virtualization - ELS 3 x86_64

Fixes

  • BZ - 1519780 - CVE-2017-5715 hw: cpu: speculative execution branch target injection

CVEs

(none)

References

Red Hat Virtualization - ELS 3

SRPM
vdsm-4.17.44-2.el7ev.src.rpm SHA-256: e07b86c324865497bc22b57acee1e02118f883c7c83b8690438b8f58ae6afe5e
x86_64
vdsm-4.17.44-2.el7ev.noarch.rpm SHA-256: 491dcf40d2da83867b13d8f94577849f0ef354bbee563e4f8ca7635f7890d546
vdsm-cli-4.17.44-2.el7ev.noarch.rpm SHA-256: 0fb7dd1e353f30dccd910a9b9b8c5b8740cb788e6669896bb1e436572e468924
vdsm-debug-plugin-4.17.44-2.el7ev.noarch.rpm SHA-256: cf09267954385362d7a7a307daa58c30393a9e845359fc8d21d6cbf6fc21517f
vdsm-hook-ethtool-options-4.17.44-2.el7ev.noarch.rpm SHA-256: 1dbbdbe76e32d695c09b0728915d5924793307e4574230343c8e2f3ce522dcae
vdsm-hook-fcoe-4.17.44-2.el7ev.noarch.rpm SHA-256: 70fad5f6e4558443d82068a8c0129894cd39a56725d1a1f0aea53afd26ed8007
vdsm-hook-macspoof-4.17.44-2.el7ev.noarch.rpm SHA-256: 433434bbae3ecd0f6fccdabdc9a3b571fe85785d946fd85269112ef041a9fd82
vdsm-hook-openstacknet-4.17.44-2.el7ev.noarch.rpm SHA-256: 812af64d8e4ae9552cc7f03b7cd985eb9ba779989bc1ab2c38af8c62dd7d488d
vdsm-hook-vhostmd-4.17.44-2.el7ev.noarch.rpm SHA-256: 9b55436b6a66ff7f2bc58bfe9177ab51651baf8b787b0f494ebd17cf5c2a018d
vdsm-hook-vmfex-dev-4.17.44-2.el7ev.noarch.rpm SHA-256: 938dffa3b21cbda9b0251d345ec9be78bd027e75d92f4b75c520fa65466c6e7c
vdsm-infra-4.17.44-2.el7ev.noarch.rpm SHA-256: 22ead1d3eadffbde84467c839ac77f598262bea238765ca988db5aec10a30db5
vdsm-jsonrpc-4.17.44-2.el7ev.noarch.rpm SHA-256: 933f7a1f42a0683745b1294f580431db5123796f7cf6e2e061f94b0322a48c2f
vdsm-python-4.17.44-2.el7ev.noarch.rpm SHA-256: e2402894e7cefd7cff3a874c17a6a3f66617fe80e23d4ed0feed5942f8cd3975
vdsm-xmlrpc-4.17.44-2.el7ev.noarch.rpm SHA-256: af4d0207fd66185c912517242cdae68ad3da470a3d273ac0461b1e5c2f9f392d
vdsm-yajsonrpc-4.17.44-2.el7ev.noarch.rpm SHA-256: 96a44f6d44825b3dfcdbb060bdb50752321bd5faa88a41755891b96d41ac50b2

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