Issued:
2018-01-04
Updated:
2018-01-04

RHSA-2018:0024 - Security Advisory

Synopsis

Important: qemu-kvm security update

Type/Severity

Security Advisory: Important

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.

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

Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM.

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 qemu-kvm 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

After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect.

Affected Products

  • Red Hat Enterprise Linux Server 6 x86_64
  • Red Hat Enterprise Linux Server 6 i386
  • Red Hat Enterprise Linux Workstation 6 x86_64
  • Red Hat Enterprise Linux Workstation 6 i386
  • Red Hat Enterprise Linux Desktop 6 x86_64
  • Red Hat Enterprise Linux Desktop 6 i386
  • Red Hat Enterprise Linux for Power, big endian 6 ppc64
  • Red Hat Enterprise Linux for Scientific Computing 6 x86_64

Fixes

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

CVEs

(none)

References

Red Hat Enterprise Linux Server 6

SRPM
qemu-kvm-0.12.1.2-2.503.el6_9.4.src.rpm SHA-256: 41c590a92889a00e3a7ec1ff1d8f11bdfb519f49b550c83b199f551817b4d82e
x86_64
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: fdbc29b878cc9940b20449ed1f897690d1eb5299d26975162a3d963fd6f3232b
qemu-img-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 2ae8c6addf84c3206dc9f56f96c3825e89010eec0d45b49577f42e8dc6e2c1b0
qemu-kvm-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 035e28b8bdf03df77c62280ce4c4bcc21a6cbec094b8c765c755946a0571aa80
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 4ef390fe1e0d2ef86ed2206e8239811752cd534e22452702eeadec3567b5e94a
qemu-kvm-tools-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 8667acfb597842894ff77e241ce98a5d0da8e09fb36dcdf53636438fc6ea88a4
i386
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4de9ea3b5fefcb032a8c756f09e583976885e28588678fb710c06f5b82cdc066
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4898e0bda8849a9f908a2421928846a0224b8cb1db9a9e4a692cb3c69934eb36

Red Hat Enterprise Linux Workstation 6

SRPM
qemu-kvm-0.12.1.2-2.503.el6_9.4.src.rpm SHA-256: 41c590a92889a00e3a7ec1ff1d8f11bdfb519f49b550c83b199f551817b4d82e
x86_64
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: fdbc29b878cc9940b20449ed1f897690d1eb5299d26975162a3d963fd6f3232b
qemu-img-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 2ae8c6addf84c3206dc9f56f96c3825e89010eec0d45b49577f42e8dc6e2c1b0
qemu-kvm-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 035e28b8bdf03df77c62280ce4c4bcc21a6cbec094b8c765c755946a0571aa80
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 4ef390fe1e0d2ef86ed2206e8239811752cd534e22452702eeadec3567b5e94a
qemu-kvm-tools-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 8667acfb597842894ff77e241ce98a5d0da8e09fb36dcdf53636438fc6ea88a4
i386
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4de9ea3b5fefcb032a8c756f09e583976885e28588678fb710c06f5b82cdc066
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4898e0bda8849a9f908a2421928846a0224b8cb1db9a9e4a692cb3c69934eb36

Red Hat Enterprise Linux Desktop 6

SRPM
qemu-kvm-0.12.1.2-2.503.el6_9.4.src.rpm SHA-256: 41c590a92889a00e3a7ec1ff1d8f11bdfb519f49b550c83b199f551817b4d82e
x86_64
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: fdbc29b878cc9940b20449ed1f897690d1eb5299d26975162a3d963fd6f3232b
qemu-img-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 2ae8c6addf84c3206dc9f56f96c3825e89010eec0d45b49577f42e8dc6e2c1b0
qemu-kvm-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 035e28b8bdf03df77c62280ce4c4bcc21a6cbec094b8c765c755946a0571aa80
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 4ef390fe1e0d2ef86ed2206e8239811752cd534e22452702eeadec3567b5e94a
qemu-kvm-tools-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 8667acfb597842894ff77e241ce98a5d0da8e09fb36dcdf53636438fc6ea88a4
i386
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4de9ea3b5fefcb032a8c756f09e583976885e28588678fb710c06f5b82cdc066
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.i686.rpm SHA-256: 4898e0bda8849a9f908a2421928846a0224b8cb1db9a9e4a692cb3c69934eb36

Red Hat Enterprise Linux for Power, big endian 6

SRPM
qemu-kvm-0.12.1.2-2.503.el6_9.4.src.rpm SHA-256: 41c590a92889a00e3a7ec1ff1d8f11bdfb519f49b550c83b199f551817b4d82e
ppc64
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.ppc64.rpm SHA-256: a1e9dd910b2cea8f6436711807f11dcfcf038969c54ebcfdddb9dd7e9e35b074
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.ppc64.rpm SHA-256: bbb00cb274a718f27c8ec70fb5ec694fc2de442c4eeca2995006a755a6243c46

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
qemu-kvm-0.12.1.2-2.503.el6_9.4.src.rpm SHA-256: 41c590a92889a00e3a7ec1ff1d8f11bdfb519f49b550c83b199f551817b4d82e
x86_64
qemu-guest-agent-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: fdbc29b878cc9940b20449ed1f897690d1eb5299d26975162a3d963fd6f3232b
qemu-img-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 2ae8c6addf84c3206dc9f56f96c3825e89010eec0d45b49577f42e8dc6e2c1b0
qemu-kvm-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 035e28b8bdf03df77c62280ce4c4bcc21a6cbec094b8c765c755946a0571aa80
qemu-kvm-debuginfo-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 4ef390fe1e0d2ef86ed2206e8239811752cd534e22452702eeadec3567b5e94a
qemu-kvm-tools-0.12.1.2-2.503.el6_9.4.x86_64.rpm SHA-256: 8667acfb597842894ff77e241ce98a5d0da8e09fb36dcdf53636438fc6ea88a4

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