Issued:
2015-05-13
Updated:
2015-05-13

RHSA-2015:1002 - Important: xen security update

Synopsis

Important: xen security update

Type/Severity

Security Advisory Important

Topic

Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

Description

The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux.

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. (CVE-2015-3456)

Red Hat would like to thank Jason Geffner of CrowdStrike for reporting this issue.

All xen users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, all running fully-virtualized guests must be restarted for this update to take effect.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux Workstation5x86_64
Red Hat Enterprise Linux Workstation5i386
Red Hat Enterprise Linux Server5x86_64
Red Hat Enterprise Linux Server5ia64
Red Hat Enterprise Linux Server5i386
Red Hat Enterprise Linux Server from RHUI5x86_64
Red Hat Enterprise Linux Server from RHUI5i386
Red Hat Enterprise Linux Desktop5x86_64
Red Hat Enterprise Linux Desktop5i386

Updated Packages

  • xen-libs-3.0.3-146.el5_11.ia64.rpm
  • xen-devel-3.0.3-146.el5_11.i386.rpm
  • xen-libs-3.0.3-146.el5_11.i386.rpm
  • xen-debuginfo-3.0.3-146.el5_11.ia64.rpm
  • xen-libs-3.0.3-146.el5_11.x86_64.rpm
  • xen-3.0.3-146.el5_11.i386.rpm
  • xen-3.0.3-146.el5_11.ia64.rpm
  • xen-3.0.3-146.el5_11.x86_64.rpm
  • xen-devel-3.0.3-146.el5_11.ia64.rpm
  • xen-devel-3.0.3-146.el5_11.x86_64.rpm
  • xen-3.0.3-146.el5_11.src.rpm
  • xen-debuginfo-3.0.3-146.el5_11.i386.rpm
  • xen-debuginfo-3.0.3-146.el5_11.x86_64.rpm

Fixes

CVEs

References

Additional information