RHSA-2018:3062 - Security Advisory

Topic

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

Red Hat Product Security has rated this update as having a security impact of Low. 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-ma packages provide the user-space component for running virtual machines that use KVM on the IBM z Systems, IBM Power, and 64-bit ARM architectures.

The following packages have been upgraded to a later upstream version: qemu-kvm-ma (2.12.0). (BZ#1562219)

Security Fix(es):

• Qemu: memory exhaustion through framebuffer update request message in VNC server (CVE-2017-15124)

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

This issue was discovered by Daniel Berrange (Red Hat).

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.6 Release Notes linked from 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

Affected Products

• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux for ARM 64 7 aarch64
• Red Hat Enterprise Linux for Power 9 7 ppc64le
• Red Hat Enterprise Linux for IBM System z (Structure A) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 1525195 - CVE-2017-15124 Qemu: memory exhaustion through framebuffer update request message in VNC server
• BZ - 1549079 - Migrate during reboot occasionally hangs in firmware with virtio-scsi:setup:inquiry...
• BZ - 1553775 - incorrect locking (possible use-after-free) with bug 1481593 fix
• BZ - 1554650 - [Regression] Cannot delete VM's snapshot
• BZ - 1572554 - [7.4-Alt] Unable to execute QEMU command 'dump-guest-memory': dump: failed to save memory
• BZ - 1595715 - Add ppa15/bpb to the default cpu model for z196 and higher in the 7.6 s390-ccw-virtio machine

CVEs

• CVE-2017-15124

References

• https://access.redhat.com/security/updates/classification/#low
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.6_release_notes/index