CVE-2015-3456
An out-of-bounds memory access flaw was found in the way QEMU's virtual Floppy Disk Controller (FDC) handled FIFO buffer access while processing certain FDC commands. A privileged guest user could use this flaw to crash the guest or, potentially, execute arbitrary code on the host with the privileges of the host's QEMU process corresponding to the guest.
Find out more about CVE-2015-3456 from the MITRE CVE dictionary dictionary and NIST NVD.
Statement
This issue affects the versions of the kvm and xen packages as shipped with Red Hat Enterprise Linux 5, the versions of the qemu-kvm packages as shipped with Red Hat Enterprise Linux 6 and 7, and the versions of qemu-kvm-rhev packages as shipped with Red Hat Enterprise Virtualization 3. Future updates for the respective releases will address this flaw.
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 |
|---|---|---|
| RHEV Agents (vdsm) (qemu-kvm-rhev) | RHSA-2015:1001 | 2015-05-13 |
| Red Hat Enterprise Linux Virtualization 5 (xen) | RHSA-2015:1002 | 2015-05-13 |
| Red Hat Enterprise Linux 5 (xen) | RHSA-2015:1002 | 2015-05-13 |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 7 (qemu-kvm-rhev) | RHSA-2015:1004 | 2015-05-13 |
| Red Hat Enterprise Linux Virtualization 5 (kvm) | RHSA-2015:1003 | 2015-05-13 |
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) for RHEL 6 (qemu-kvm-rhev) | RHSA-2015:1004 | 2015-05-13 |
| Red Hat Enterprise Linux OpenStack Platform 4.0 (qemu-kvm-rhev) | RHSA-2015:1004 | 2015-05-13 |
| Red Hat Enterprise Linux Extended Update Support 6.5 (qemu-kvm) | RHSA-2015:1031 | 2015-05-27 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts | RHSA-2015:1011 | 2015-05-15 |
| RHEV Hypervisor for RHEL-6 (rhev-hypervisor6) | RHSA-2015:1011 | 2015-05-15 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) | RHSA-2015:1000 | 2015-05-13 |
| Red Hat Enterprise Linux 6 (qemu-kvm) | RHSA-2015:0998 | 2015-05-13 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 (qemu-kvm-rhev) | RHSA-2015:1004 | 2015-05-13 |
| Red Hat Enterprise Linux 7 (qemu-kvm) | RHSA-2015:0999 | 2015-05-13 |
Affected Packages State
| Platform | Package | State |
|---|---|---|
| RHEV Manager 3 | rhev-hypervisor | Affected |