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 7.3 Extended Update Support.

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 - Extended Update Support 7.3 x86_64
• Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3 ppc64
• Red Hat Enterprise Linux EUS Compute Node 7.3 x86_64
• Red Hat Enterprise Linux Server - AUS 7.3 x86_64
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3 ppc64le
• Red Hat Enterprise Linux Server - TUS 7.3 x86_64
• Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.3 ppc64le
• Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.3 x86_64

Fixes

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

CVEs

(none)

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/security/vulnerabilities/speculativeexecution
• https://access.redhat.com/security/cve/CVE-2017-5715

Red Hat Enterprise Linux Server - Extended Update Support 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
x86_64
qemu-img-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 1a191975766f63a8a0aeb368d6ab50930bb61f9f078ac5ab86d1c0b6bdd7499f
qemu-kvm-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 065997977480c42ce83ba8f7b9090a4511d3fbd311225c44f7471e0192be1055
qemu-kvm-common-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: dab929a9c708d653cc7676b52073e24bf495a07747d57fe9e097374c9f3c1b6e
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 26bcc58dd203bc05d278109ff75995522975cd5a65c359ab4db144cfb1de4fbd
qemu-kvm-tools-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: d5a936281f56badb5e7e2408021af619488b234d4a30b0e32d5cc55df9ac7ceb

Red Hat Enterprise Linux Server - AUS 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
x86_64
qemu-img-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 1a191975766f63a8a0aeb368d6ab50930bb61f9f078ac5ab86d1c0b6bdd7499f
qemu-kvm-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 065997977480c42ce83ba8f7b9090a4511d3fbd311225c44f7471e0192be1055
qemu-kvm-common-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: dab929a9c708d653cc7676b52073e24bf495a07747d57fe9e097374c9f3c1b6e
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 26bcc58dd203bc05d278109ff75995522975cd5a65c359ab4db144cfb1de4fbd
qemu-kvm-tools-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: d5a936281f56badb5e7e2408021af619488b234d4a30b0e32d5cc55df9ac7ceb

Red Hat Enterprise Linux for Power, big endian - Extended Update Support 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
ppc64
qemu-img-1.5.3-126.el7_3.13.ppc64.rpm	SHA-256: eef67833a141ed5f6e8f5b77e4d2f78e0217a7eec7e77e50a738624841cd2cae
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.ppc64.rpm	SHA-256: 97af928b723ec76d72dbec400352fbd44e39c59cce4d5c3c6c91e7f1f0428e0c

Red Hat Enterprise Linux EUS Compute Node 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
x86_64
qemu-img-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 1a191975766f63a8a0aeb368d6ab50930bb61f9f078ac5ab86d1c0b6bdd7499f
qemu-kvm-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 065997977480c42ce83ba8f7b9090a4511d3fbd311225c44f7471e0192be1055
qemu-kvm-common-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: dab929a9c708d653cc7676b52073e24bf495a07747d57fe9e097374c9f3c1b6e
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 26bcc58dd203bc05d278109ff75995522975cd5a65c359ab4db144cfb1de4fbd
qemu-kvm-tools-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: d5a936281f56badb5e7e2408021af619488b234d4a30b0e32d5cc55df9ac7ceb

Red Hat Enterprise Linux for Power, little endian - Extended Update Support 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
ppc64le
qemu-img-1.5.3-126.el7_3.13.ppc64le.rpm	SHA-256: a0970528ee55f09d9b069b2cd2dc8351b53c02742d43507462fff9b98f8f542b
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.ppc64le.rpm	SHA-256: 766bb33cca993bffcc41f4561c21f9cc1185725f920cf75e093e3e07c617e50a

Red Hat Enterprise Linux Server - TUS 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
x86_64
qemu-img-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 1a191975766f63a8a0aeb368d6ab50930bb61f9f078ac5ab86d1c0b6bdd7499f
qemu-kvm-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 065997977480c42ce83ba8f7b9090a4511d3fbd311225c44f7471e0192be1055
qemu-kvm-common-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: dab929a9c708d653cc7676b52073e24bf495a07747d57fe9e097374c9f3c1b6e
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 26bcc58dd203bc05d278109ff75995522975cd5a65c359ab4db144cfb1de4fbd
qemu-kvm-tools-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: d5a936281f56badb5e7e2408021af619488b234d4a30b0e32d5cc55df9ac7ceb

Red Hat Enterprise Linux Server (for IBM Power LE) - Update Services for SAP Solutions 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
ppc64le
qemu-img-1.5.3-126.el7_3.13.ppc64le.rpm	SHA-256: a0970528ee55f09d9b069b2cd2dc8351b53c02742d43507462fff9b98f8f542b
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.ppc64le.rpm	SHA-256: 766bb33cca993bffcc41f4561c21f9cc1185725f920cf75e093e3e07c617e50a

Red Hat Enterprise Linux Server - Update Services for SAP Solutions 7.3

SRPM
qemu-kvm-1.5.3-126.el7_3.13.src.rpm	SHA-256: 110191da7b3b8df79fa15273d46a7f1fbe0d247fa2b4d4d6737dd3714fef0aa3
x86_64
qemu-img-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 1a191975766f63a8a0aeb368d6ab50930bb61f9f078ac5ab86d1c0b6bdd7499f
qemu-kvm-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 065997977480c42ce83ba8f7b9090a4511d3fbd311225c44f7471e0192be1055
qemu-kvm-common-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: dab929a9c708d653cc7676b52073e24bf495a07747d57fe9e097374c9f3c1b6e
qemu-kvm-debuginfo-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: 26bcc58dd203bc05d278109ff75995522975cd5a65c359ab4db144cfb1de4fbd
qemu-kvm-tools-1.5.3-126.el7_3.13.x86_64.rpm	SHA-256: d5a936281f56badb5e7e2408021af619488b234d4a30b0e32d5cc55df9ac7ceb