Issued:
2016-08-09
Updated:
2016-08-09

RHSA-2016:1585 - Security Advisory

Synopsis

Moderate: qemu-kvm security update

Type/Severity

Security Advisory: Moderate

Topic

An update for qemu-kvm is now available for Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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 AMD64 and Intel 64 systems. The qemu-kvm packages provide the user-space component for running virtual machines using KVM.

Security Fix(es):

  • Quick emulator(Qemu) built with the virtio framework is vulnerable to an unbounded memory allocation issue. It was found that a malicious guest user could submit more requests than the virtqueue size permits. Processing a request allocates a VirtQueueElement and therefore causes unbounded memory allocation on the host controlled by the guest. (CVE-2016-5403)

Red Hat would like to thank hongzhenhao (Marvel Team) for reporting this issue.

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

  • Red Hat Enterprise Linux Server 6 x86_64
  • Red Hat Enterprise Linux Server 6 i386
  • Red Hat Enterprise Linux Workstation 6 x86_64
  • Red Hat Enterprise Linux Workstation 6 i386
  • Red Hat Enterprise Linux Desktop 6 x86_64
  • Red Hat Enterprise Linux Desktop 6 i386
  • Red Hat Enterprise Linux for Power, big endian 6 ppc64
  • Red Hat Enterprise Linux for Scientific Computing 6 x86_64

Fixes

  • BZ - 1358359 - CVE-2016-5403 Qemu: virtio: unbounded memory allocation on host via guest leading to DoS

CVEs

References

Red Hat Enterprise Linux Server 6

SRPM
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm SHA-256: ca3f8f44f8609b995fd07cf50644c76342c74d47c6355f41ca693614b1921cea
x86_64
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: cba5db5ce7f3aacf7afe8f86350d21918be4e57273981519d0009099a8716b5d
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: fe5db5a73b20bf808d78c2e4e275de779a347099220a09baeeac0fb4d3d2010b
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: ccdb5dcd010cef5d077ddb4d60ecaada5485631f8a180d7bc782e3093fcbc71e
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: f08a0915f4a4b4e0102e47deb731e0d72488da7cc6cd2a460780661002d2ba9f
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: c611ff7f35d3fb2fd1744b12f70f56184b8512460a959a0d8f45160b72f5e9ba
i386
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: 2149c7573a99c3e9186ee9924f387629d2d892e9d4b0a7d05e33409ff2c5d798
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: d7d6f64a9a98fa9c41386b4b855fa30e64e14c14f783e780adc44527db61d841

Red Hat Enterprise Linux Workstation 6

SRPM
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm SHA-256: ca3f8f44f8609b995fd07cf50644c76342c74d47c6355f41ca693614b1921cea
x86_64
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: cba5db5ce7f3aacf7afe8f86350d21918be4e57273981519d0009099a8716b5d
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: fe5db5a73b20bf808d78c2e4e275de779a347099220a09baeeac0fb4d3d2010b
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: ccdb5dcd010cef5d077ddb4d60ecaada5485631f8a180d7bc782e3093fcbc71e
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: f08a0915f4a4b4e0102e47deb731e0d72488da7cc6cd2a460780661002d2ba9f
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: c611ff7f35d3fb2fd1744b12f70f56184b8512460a959a0d8f45160b72f5e9ba
i386
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: 2149c7573a99c3e9186ee9924f387629d2d892e9d4b0a7d05e33409ff2c5d798
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: d7d6f64a9a98fa9c41386b4b855fa30e64e14c14f783e780adc44527db61d841

Red Hat Enterprise Linux Desktop 6

SRPM
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm SHA-256: ca3f8f44f8609b995fd07cf50644c76342c74d47c6355f41ca693614b1921cea
x86_64
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: cba5db5ce7f3aacf7afe8f86350d21918be4e57273981519d0009099a8716b5d
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: fe5db5a73b20bf808d78c2e4e275de779a347099220a09baeeac0fb4d3d2010b
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: ccdb5dcd010cef5d077ddb4d60ecaada5485631f8a180d7bc782e3093fcbc71e
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: f08a0915f4a4b4e0102e47deb731e0d72488da7cc6cd2a460780661002d2ba9f
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: c611ff7f35d3fb2fd1744b12f70f56184b8512460a959a0d8f45160b72f5e9ba
i386
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: 2149c7573a99c3e9186ee9924f387629d2d892e9d4b0a7d05e33409ff2c5d798
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.i686.rpm SHA-256: d7d6f64a9a98fa9c41386b4b855fa30e64e14c14f783e780adc44527db61d841

Red Hat Enterprise Linux for Power, big endian 6

SRPM
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm SHA-256: ca3f8f44f8609b995fd07cf50644c76342c74d47c6355f41ca693614b1921cea
ppc64
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.ppc64.rpm SHA-256: 9ced1c1d6e4a4f0b4f66ee35a2bbc342acb0c9ecb82dfdafbecd788fee0d19be
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.ppc64.rpm SHA-256: 180c82ac22f639bfb1845ca9cbb2dfa3fdc5c2733f99c12c7b29da7ff59d43fe

Red Hat Enterprise Linux for Scientific Computing 6

SRPM
qemu-kvm-0.12.1.2-2.491.el6_8.3.src.rpm SHA-256: ca3f8f44f8609b995fd07cf50644c76342c74d47c6355f41ca693614b1921cea
x86_64
qemu-guest-agent-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: cba5db5ce7f3aacf7afe8f86350d21918be4e57273981519d0009099a8716b5d
qemu-img-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: fe5db5a73b20bf808d78c2e4e275de779a347099220a09baeeac0fb4d3d2010b
qemu-kvm-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: ccdb5dcd010cef5d077ddb4d60ecaada5485631f8a180d7bc782e3093fcbc71e
qemu-kvm-debuginfo-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: f08a0915f4a4b4e0102e47deb731e0d72488da7cc6cd2a460780661002d2ba9f
qemu-kvm-tools-0.12.1.2-2.491.el6_8.3.x86_64.rpm SHA-256: c611ff7f35d3fb2fd1744b12f70f56184b8512460a959a0d8f45160b72f5e9ba

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.