CVE-2015-3214

Impact:
Moderate
Public Date:
2015-06-16
CWE:
CWE-119
Bugzilla:
1229640: CVE-2015-3214 qemu/kvm: i8254: out-of-bounds memory access in pit_ioport_read function
An out-of-bounds memory access flaw, leading to memory corruption or possibly an information leak, was found in QEMU's pit_ioport_read() function. A privileged guest user in a QEMU guest, which had QEMU PIT emulation enabled, could potentially, in rare cases, use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process.

Find out more about CVE-2015-3214 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the versions of the qemu and qemu-kvm packages as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise Linux 6 based versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3.

This issue does affect the Red Hat Enterprise Linux 7 qemu-kvm and Red Hat Enterprise Linux 7 based versions of the qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. Future updates for the respective releases may address this flaw.

Please note that by default QEMU/KVM guests use in-kernel (KVM) PIT emulation
in which case the following applies:

This issue does not affect the Linux kernel versions as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise Linux MRG 2.

This issue does affect the kvm package as shipped with Red Hat Enterprise Linux 5.

Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

Red Hat Enterprise Linux 5:
This vulnerability has been rated as having a security impact of Moderate. After evaluation and in accordance with the criteria noted in the product support life cycle, there are no plans to address this issue in an upcoming release. Please contact Red Hat Support for further information.

CVSS v2 metrics

Base Score 6.5
Base Metrics AV:A/AC:H/Au:S/C:C/I:C/A:C
Access Vector Adjacent Network
Access Complexity High
Authentication Single
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) RHSA-2015:1508 2015-07-27
Red Hat Enterprise Linux 7 (qemu-kvm) RHSA-2015:1507 2015-07-27
Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 (qemu-kvm-rhev) RHSA-2015:1512 2015-07-28
Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 (qemu-kvm-rhev) RHSA-2015:1512 2015-07-28

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 kernel Not affected
Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 qemu-kvm-rhev Not affected
Red Hat Enterprise Linux OpenStack Platform 4.0 qemu-kvm-rhev Not affected
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 7 kernel-rt Not affected
Red Hat Enterprise Linux 6 qemu-kvm Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 xen Not affected
Red Hat Enterprise Linux 5 kvm Will not fix
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.

Acknowledgements

Red Hat would like to thank Matt Tait of Google's Project Zero security team for reporting this issue.
Last Modified