Red Hat Bugzilla – Bug 877365
CVE-2012-5511 CVE-2012-6333 kernel: xen: several HVM operations do not validate the range of their inputs
Last modified: 2013-08-24 10:03:11 EDT
Several HVM control operations do not check the size of their inputs
and can tie up a physical CPU for extended periods of time.
In addition dirty video RAM tracking involves clearing the bitmap
provided by the domain controlling the guest (e.g. dom0 or a
stubdom). If the size of that bitmap is overly large, an intermediate
variable on the hypervisor stack may overflow that stack.
A malicious guest administrator can cause Xen to become unresponsive
or to crash leading in either case to a Denial of Service.
Red Hat would like to thank the Xen project for reporting this issue.
This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.
This issue did not affect Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG as we did not have support for Xen hypervisor.
Created xen tracking bugs for this issue
Affects: fedora-all [bug 883084]
xen-4.2.0-6.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
xen-4.1.3-7.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
*** Bug 886863 has been marked as a duplicate of this bug. ***
xen-4.1.3-6.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.