Issued:
2018-04-10
Updated:
2018-04-10

RHSA-2018:0816 - Low: qemu-kvm security, bug fix, and enhancement update

Synopsis

Low: qemu-kvm security, bug fix, and enhancement update

Type/Severity

Security Advisory Low

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

Security Fix(es):

  • Qemu: vga: OOB read access during display update (CVE-2017-13672)

  • Qemu: Slirp: use-after-free when sending response (CVE-2017-13711)

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

  • Qemu: I/O: potential memory exhaustion via websock connection to VNC (CVE-2017-15268)

  • Qemu: Out-of-bounds read in vga_draw_text routine (CVE-2018-5683)

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.

Red Hat would like to thank David Buchanan for reporting CVE-2017-13672; Wjjzhang (Tencent.com) for reporting CVE-2017-13711; and Jiang Xin and Lin ZheCheng for reporting CVE-2018-5683. The CVE-2017-15124 issue was discovered by Daniel Berrange (Red Hat).

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.5 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

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

ProductVersionArch
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions7.7x86_64
Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions7.6x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support7.7x86_64
Red Hat Enterprise Linux for x86_64 - Extended Update Support7.6x86_64
Red Hat Enterprise Linux for Scientific Computing7x86_64
Red Hat Enterprise Linux Workstation7x86_64
Red Hat Enterprise Linux Server7x86_64
Red Hat Enterprise Linux Server - TUS7.7x86_64
Red Hat Enterprise Linux Server - TUS7.6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support7x86_64
Red Hat Enterprise Linux Server - AUS7.7x86_64
Red Hat Enterprise Linux Server - AUS7.6x86_64
Red Hat Enterprise Linux EUS Compute Node7.7x86_64
Red Hat Enterprise Linux EUS Compute Node7.6x86_64
Red Hat Enterprise Linux Desktop7x86_64

Updated Packages

  • qemu-kvm-common-1.5.3-156.el7.x86_64.rpm
  • qemu-kvm-debuginfo-1.5.3-156.el7.x86_64.rpm
  • qemu-img-1.5.3-156.el7.x86_64.rpm
  • qemu-kvm-tools-1.5.3-156.el7.x86_64.rpm
  • qemu-kvm-1.5.3-156.el7.x86_64.rpm
  • qemu-kvm-1.5.3-156.el7.src.rpm

Fixes

CVEs

References

Additional information