Sigurnosni nedostatak programskog paketa qemu-kvm

Detalji os-a: WN7
Važnost: URG
Operativni sustavi: L
Kategorije: LRH

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Red Hat Security Advisory

Synopsis: Important: qemu-kvm security update

Advisory ID: RHSA-2018:0103-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2018:0103

Issue date: 2018-01-22

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1. Summary:

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.7

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux HPC Node EUS (v. 6.7) – x86_64

Red Hat Enterprise Linux Server EUS (v. 6.7) – i386, ppc64, x86_64

3. 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.

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/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.

5. Bugs fixed (https://bugzilla.redhat.com/):

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

6. Package List:

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):

Source:

qemu-kvm-0.12.1.2-2.479.el6_7.6.src.rpm

x86_64:

qemu-guest-agent-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-img-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.479.el6_7.6.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 6.7):

Source:

qemu-kvm-0.12.1.2-2.479.el6_7.6.src.rpm

i386:

qemu-guest-agent-0.12.1.2-2.479.el6_7.6.i686.rpm

qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.6.i686.rpm

ppc64:

qemu-guest-agent-0.12.1.2-2.479.el6_7.6.ppc64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.6.ppc64.rpm

x86_64:

qemu-guest-agent-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-img-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-debuginfo-0.12.1.2-2.479.el6_7.6.x86_64.rpm

qemu-kvm-tools-0.12.1.2-2.479.el6_7.6.x86_64.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/updates/classification/#important

https://access.redhat.com/security/vulnerabilities/speculativeexecution

https://access.redhat.com/security/cve/CVE-2017-5715

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact

details at https://access.redhat.com/security/team/contact/

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Red Hat Security Advisory

Synopsis: Important: qemu-kvm security update

Advisory ID: RHSA-2018:0104-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2018:0104

Issue date: 2018-01-22

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1. Summary:

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.6

Advanced Update Support and Red Hat Enterprise Linux 6.6 Telco 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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server AUS (v. 6.6) – x86_64

Red Hat Enterprise Linux Server TUS (v. 6.6) – x86_64