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Red Hat 7 RHSA-2018-0816 Low: Security Update for QEMU-KVM Vulnerability

red hat
Calendar Grey April 10, 2018
Scroller Redhat
New qemu-kvm update in Red Hat Enterprise Linux 7 issued, categorized with Low security impact, resolving multiple bugs and enhancing system performance.
An update for qemu-kvm is now available for Red Hat Enterprise Linux 7

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.

Summary

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.

Topics%20covered

Topics Covered

security advisory bug fix red hat enterprise linux low impact qemu-kvm virtualization update

References

https://access.redhat.com/security/cve/CVE-2017-13672 https://access.redhat.com/security/cve/CVE-2017-13711 https://access.redhat.com/security/cve/CVE-2017-15124 https://access.redhat.com/security/cve/CVE-2017-15268 https://access.redhat.com/security/cve/CVE-2018-5683 https://access.redhat.com/security/updates/classification#low https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/7/html/7.5_release_notes/index.html

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: qemu-kvm-1.5.3-156.el7.src.rpm
x86_64: qemu-img-1.5.3-156.el7.x86_64.rpm qemu-kvm-1.5.3-156.el7.x86_64.rpm qemu-kvm-common-1.5.3-156.el7.x86_64.rpm qemu-kvm-debuginfo-1.5.3-156.el7.x86_64.rpm qemu-kvm-tools-1.5.3-156.el7.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
Source: qemu-kvm-1.5.3-156.el7.src.rpm
x86_64: qemu-img-1.5.3-156.el7.x86_64.rpm qemu-kvm-1.5.3-156.el7.x86_64.rpm qemu-kvm-common-1.5.3-156.el7.x86_64.rpm qemu-kvm-debuginfo-1.5.3-156.el7.x86_64.rpm qemu-kvm-tools-1.5.3-156.el7.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: qemu-kvm-1.5.3-156.el7.src.rpm
x86_64: qemu-img-1.5.3-156.el7.x86_64.rpm qemu-kvm-1.5.3-156.el7.x86_64.rpm qemu-kvm-common-1.5.3-156.el7.x86_64.rpm qemu-kvm-debuginfo-1.5.3-156.el7.x86_64.rpm qemu-kvm-tools-1.5.3-156.el7.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source: qemu-kvm-1.5.3-156.el7.src.rpm
x86_64: qemu-img-1.5.3-156.el7.x86_64.rpm qemu-kvm-1.5.3-156.el7.x86_64.rpm qemu-kvm-common-1.5.3-156.el7.x86_64.rpm qemu-kvm-debuginfo-1.5.3-156.el7.x86_64.rpm qemu-kvm-tools-1.5.3-156.el7.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


Severity
low
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2018:0816-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2018:0816
Issue date: 2018-04-10

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 impactof Low. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory bug fix red hat enterprise linux low impact qemu-kvm virtualization update

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Bugs Fixed

1411490 - [RFE] Kernel address space layout randomization [KASLR] support (qemu-kvm)

1417864 - Qemu-kvm starts with unspecified port

1435352 - qemu started with "-vnc none,..." doesn't support any VNC authentication

1450396 - Add support for AMD EPYC processors1455451 - VM with pty based serial console hangs if PTS buffer is full

1459725 - Prevent qemu-img resize from causing "Active L1 table too large"

1460872 - Aborted(core dumped) when booting guest with "-netdev tap....vhost=on,queues=32"

1461672 - qemu-img core dumped when create external snapshot through ssh protocol without specifying image size

1470244 - reboot leads to shutoff of qemu-kvm-vm if i6300esb-watchdog set to poweroff

1473536 - Hangs in serial console under qemu

1476641 - ui/vnc_keysym.h is very out of date and does not correctly support many Eastern European keyboards

1486400 - CVE-2017-13711 Qemu: Slirp: use-after-free when sending response

1486560 - CVE-2017-13672 Qemu: vga: OOB read access during display update

1491434 - KVM leaks file descriptors when attaching and detaching virtio-scsi block devices

1492559 - virtio-blk mutiwrite merge causes too big IO

1494181 - Backport vGPU support to qemu-kvm

1496879 - CVE-2017-15268 Qemu: I/O: potential memory exhaustion via websock connection to VNC

1511802 - Regression in QEMU handling for sub-page MMIO BARs for vfio-pci devices

1520793 - Do not build non-x86_64 subpackages

Read the Full Advisory

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