[El-errata] New updates available via Ksplice (ELSA-2014-3082)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2014-3082 can now be patched using Ksplice
CVEs: CVE-2013-2596 CVE-2014-3122 CVE-2014-3601 CVE-2014-4653 CVE-2014-4654 CVE-2014-4655

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Security Advisory, ELSA-2014-3082.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on EL 6 install these
updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2014-3122: Denial-of-service in non-linear memory mappings.

An assertion failure and kernel panic can be triggered when unmapping a
non-linear memory mapping.  This could be exploited by a local,
unprivileged user to crash the system.


* CVE-2014-3601: Denial-of-service in KVM page mapping.

The kvm map pages function miscalculates the number of pages in the case
of a mapping failure, which allows guest OS users to (1) cause a denial of
service (host OS memory corruption) or possibly have unspecified other
impact by triggering a large gfn value or (2) cause a denial of service
(host OS memory consumption) by triggering a small gfn value that leads to
permanently pinned pages.


* CVE-2014-4654, CVE-2014-4655: Missing validity checks in ALSA user controls.

Missing validity checks when replacing user controls could lead to an attempt
to free something that is not a user control or a control that is not owned
by the process. Userspace was also allowed to to bypass user control count
by overflowing it.


* CVE-2014-4653: Use after free in ALSA card controls.

Missing synchronization in ALSA card controls could lead to a control
being freed while being in use.


* CVE-2013-2596: Privilege escalation in video frame buffer driver.

Integer overflow in the fb_mmap() function allows local users to create a
read-write memory mapping for the entirety of kernel memory, and
consequently gain privileges, via crafted /dev/graphics/fb0 mmap2 system
calls.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.