[El-errata] New updates available via Ksplice (ELSA-2013-2587)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2013-2587 can now be patched using Ksplice
CVEs: CVE-2013-4470 CVE-2013-6367 CVE-2013-6368 CVE-2013-6376

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Security Advisory, ELSA-2013-2587.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on EL 5 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-2013-6367: Divide-by-zero in KVM LAPIC.

A divide-by-zero flaw was found in the apic_get_tmcct() function in KVM's
Local Advanced Programmable Interrupt Controller (LAPIC) implementation.
A privileged guest user could use this flaw to crash the host.


* CVE-2013-6368: Memory corruption in KVM virtual APIC accesses.

A memory corruption flaw was discovered in the way KVM handled virtual
APIC accesses that crossed a page boundary. A local, unprivileged user
could use this flaw to crash the system or, potentially, escalate their
privileges on the system.


* CVE-2013-6376: Denial-of-service in KVM X2APIC.

A malicious KVM guest could crash the VM host by triggering an assertion
in the X2APIC emulation where only a single cluster is supported.  A
privileged user in the guest could use this to crash the host.


* CVE-2013-4470: Memory corruption in IPv4 and IPv6 networking corking with UFO.

The kernel IP stack does not correctly handle sending fragmented packets via a
device which has UDP Fragmentation Offload enabled leading to memory corruption
and a kernel panic.

SUPPORT

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