RHSA-2020:0730 - Security Advisory

Topic

An update for qemu-kvm-rhev is now available for Red Hat Virtualization Engine 4.2.

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

KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products.

Security Fix(es):

• hw: TSX Transaction Asynchronous Abort (TAA) (CVE-2019-11135)
• QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server (CVE-2020-1711)

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.

Bug Fix(es):

• [Intel 7.6.z Bug] [KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM qemu-kvm-rhev (BZ#1730601)
• qemu-kvm-rhev: backport cpuidle-haltpoll support (BZ#1746281)

Enhancement(s):

• [Intel 7.7 FEAT] MDS_NO exposure to guest - qemu-kvm-rhev (BZ#1743632)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/2974891

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 Virtualization Manager 4.2 x86_64

Fixes

• BZ - 1746281 - qemu-kvm-rhev: backport cpuidle-haltpoll support [rhel-7.6.z]
• BZ - 1753062 - CVE-2019-11135 hw: TSX Transaction Asynchronous Abort (TAA)
• BZ - 1794290 - CVE-2020-1711 QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server

CVEs

• CVE-2019-11135
• CVE-2020-1711

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/solutions/tsx-asynchronousabort