Issued:
2017-03-07
Updated:
2017-03-07

RHSA-2017:0454 - Important: kvm security update

Synopsis

Important: kvm security update

Type/Severity

Security Advisory Important

Topic

An update for kvm is now available for Red Hat Enterprise Linux 5.

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 (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware. Using KVM, one can run multiple virtual machines running unmodified Linux or Windows images. Each virtual machine has private virtualized hardware: a network card, disk, graphics adapter, etc.

Security Fix(es):

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA emulator support is vulnerable to an out-of-bounds access issue. It could occur while copying VGA data via bitblt copy in backward mode. A privileged user inside a guest could use this flaw to crash the QEMU process resulting in DoS or potentially execute arbitrary code on the host with privileges of QEMU process on the host. (CVE-2017-2615)

  • Quick emulator (QEMU) built with the Cirrus CLGD 54xx VGA Emulator support is vulnerable to an out-of-bounds access issue. The issue could occur while copying VGA data in cirrus_bitblt_cputovideo. A privileged user inside guest could use this flaw to crash the QEMU process OR potentially execute arbitrary code on host with privileges of the QEMU process. (CVE-2017-2620)

Red Hat would like to thank Wjjzhang (Tencent.com Inc.) and Li Qiang (360.cn Inc.) for reporting CVE-2017-2615.

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

Note: The procedure in the Solution section must be performed before this update will take effect.

Affected Products

ProductVersionArch
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Server5x86_64

Updated Packages

  • kmod-kvm-83-277.el5_11.x86_64.rpm
  • kvm-83-277.el5_11.x86_64.rpm
  • kvm-qemu-img-83-277.el5_11.x86_64.rpm
  • kvm-tools-83-277.el5_11.x86_64.rpm
  • kvm-debuginfo-83-277.el5_11.x86_64.rpm
  • kmod-kvm-debug-83-277.el5_11.x86_64.rpm
  • kvm-83-277.el5_11.src.rpm

Fixes

CVEs

References

Additional information