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Red Hat Product Errata RHSA-2019:1178 - Security Advisory
Issued:
2019-05-14
Updated:
2019-05-14

RHSA-2019:1178 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Important: qemu-kvm security update

Type/Severity

Security Advisory: Important

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 7.

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 packages provide the user-space component for running virtual machines that use KVM.

Security Fix(es):

  • A flaw was found in the implementation of the "fill buffer", a mechanism used by modern CPUs when a cache-miss is made on L1 CPU cache. If an attacker can generate a load operation that would create a page fault, the execution will continue speculatively with incorrect data from the fill buffer while the data is fetched from higher level caches. This response time can be measured to infer data in the fill buffer. (CVE-2018-12130)
  • Modern Intel microprocessors implement hardware-level micro-optimizations to improve the performance of writing data back to CPU caches. The write operation is split into STA (STore Address) and STD (STore Data) sub-operations. These sub-operations allow the processor to hand-off address generation logic into these sub-operations for optimized writes. Both of these sub-operations write to a shared distributed processor structure called the 'processor store buffer'. As a result, an unprivileged attacker could use this flaw to read private data resident within the CPU's processor store buffer. (CVE-2018-12126)
  • Microprocessors use a ‘load port’ subcomponent to perform load operations from memory or IO. During a load operation, the load port receives data from the memory or IO subsystem and then provides the data to the CPU registers and operations in the CPU’s pipelines. Stale load operations results are stored in the 'load port' table until overwritten by newer operations. Certain load-port operations triggered by an attacker can be used to reveal data about previous stale requests leaking data back to the attacker via a timing side-channel. (CVE-2018-12127)
  • Uncacheable memory on some microprocessors utilizing speculative execution may allow an authenticated user to potentially enable information disclosure via a side channel with local access. (CVE-2019-11091)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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 7 x86_64
  • Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6 x86_64
  • Red Hat Enterprise Linux Workstation 7 x86_64
  • Red Hat Enterprise Linux Desktop 7 x86_64
  • Red Hat Enterprise Linux for Scientific Computing 7 x86_64
  • Red Hat Enterprise Linux EUS Compute Node 7.6 x86_64
  • Red Hat Enterprise Linux Server - AUS 7.6 x86_64
  • Red Hat Enterprise Linux Server - TUS 7.6 x86_64
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6 x86_64

Fixes

  • BZ - 1646781 - CVE-2018-12126 hardware: Microarchitectural Store Buffer Data Sampling (MSBDS)
  • BZ - 1646784 - CVE-2018-12130 hardware: Microarchitectural Fill Buffer Data Sampling (MFBDS)
  • BZ - 1667782 - CVE-2018-12127 hardware: Micro-architectural Load Port Data Sampling - Information Leak (MLPDS)
  • BZ - 1705312 - CVE-2019-11091 hardware: Microarchitectural Data Sampling Uncacheable Memory (MDSUM)

CVEs

  • CVE-2018-12126
  • CVE-2018-12127
  • CVE-2018-12130
  • CVE-2019-11091

References

  • https://access.redhat.com/security/updates/classification/#important
  • https://access.redhat.com/security/vulnerabilities/mds
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat Enterprise Linux Server 7

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux for x86_64 - Extended Update Support 7.6

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux Workstation 7

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux Desktop 7

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux for Scientific Computing 7

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux EUS Compute Node 7.6

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux Server - AUS 7.6

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux Server - TUS 7.6

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 7.6

SRPM
qemu-kvm-1.5.3-160.el7_6.2.src.rpm SHA-256: af74904c39891c0dfbc4f6bf79c3fc881735e5a52e588e2287b83e901ae1245e
x86_64
qemu-img-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: b34b8ddd121e30f4d8df01e7e3af2a39655a38b4b8cdd860f6311855e309d1ec
qemu-kvm-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: e57599a32da50d9d6c44656ec4d246cddf2f8b68487fb30d5ab281990cb8b71c
qemu-kvm-common-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 95c5da039767b531ce99b47bf8d0c3ca9569ef562013532d733f64d71bb0dcf6
qemu-kvm-debuginfo-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 0f418684ed6d19187bf78dcc04ec87d542a3cefdb33c36a24b31cc983a1cf1a2
qemu-kvm-tools-1.5.3-160.el7_6.2.x86_64.rpm SHA-256: 7e646a51d188c992501dcd1d8adb898208dcc724953b863bc6203be67020164f

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

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