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Red Hat Product Errata RHSA-2016:1653 - Security Advisory
Issued:
2016-08-23
Updated:
2016-08-23

RHSA-2016:1653 - Security Advisory

  • Overview
  • Updated Packages

Synopsis

Moderate: qemu-kvm-rhev security update

Type/Severity

Security Advisory: Moderate

Red Hat Insights patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

Topic

An update for qemu-kvm-rhev is now available for Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7.

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-rhev package provides the user-space component for running virtual machines using KVM in environments managed by Red Hat Enterprise Virtualization Manager.

Security Fix(es):

  • Quick Emulator(Qemu) built with the Block driver for iSCSI images support (virtio-blk) is vulnerable to a heap buffer overflow issue. It could occur while processing iSCSI asynchronous I/O ioctl(2) calls. A user inside guest could use this flaw to crash the Qemu process resulting in DoS or potentially leverage it to execute arbitrary code with privileges of the Qemu process on the host. (CVE-2016-5126)
  • 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 CVE-2016-5403.

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 OpenStack 7 x86_64

Fixes

  • BZ - 1340924 - CVE-2016-5126 Qemu: block: iscsi: buffer overflow in iscsi_aio_ioctl
  • BZ - 1358359 - CVE-2016-5403 Qemu: virtio: unbounded memory allocation on host via guest leading to DoS

CVEs

  • CVE-2016-5126
  • CVE-2016-5403

References

  • http://www.redhat.com/security/updates/classification/#normal
Note: More recent versions of these packages may be available. Click a package name for more details.

Red Hat OpenStack 7

SRPM
qemu-kvm-rhev-2.3.0-31.el7_2.21.src.rpm SHA-256: a94c0e89ace45eac3032f11f18d6d39953a42c6ee261d2d578600b9a38452dff
x86_64
libcacard-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: 7c50554554d757cfed5786d347bd66191825effa36184875b0ebcf6c4a39ad79
libcacard-tools-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: 60d6c5f595b58134b837fcbfc38e4124c7bb7ff66bc95779a45cd6e9d89c9d3e
qemu-img-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: 4cde725205c07e2397f86948aba8a34258d6a0200abe5e19f4825e86759962ab
qemu-kvm-common-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: 70516a1ac8707862fd95d32ecf8f4f1552f91e509bfc20e6b5570109068d00f6
qemu-kvm-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: f3a9662980f6687eeb37e52174a0cdfed256cc38092dee7d6fbd33a764399926
qemu-kvm-rhev-debuginfo-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: e3e9eeb357e7fb33f425308913b12601252caa00f863ba7fd36875ead3bc4e48
qemu-kvm-tools-rhev-2.3.0-31.el7_2.21.x86_64.rpm SHA-256: 334203df05dafc3e9a043320a0a48a09bcd7bf4f0c1c5e3b1275ff0d118e52ef

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

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