[El-errata] New updates available via Ksplice (ELSA-2013-2503)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2013-2503 can now be patched using Ksplice
CVEs: CVE-2012-4398 CVE-2012-4461 CVE-2012-4530 CVE-2013-0190
CVE-2013-0216 CVE-2013-0217

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Security Advisory, ELSA-2013-2503.

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-2013-0216: Memory leak in Xen net backend driver.

A malicious guest can cause a memory leak in the host networking stack
by sending malformed requests to the Xen backend driver, leading to a
kernel panic.


* CVE-2013-0217: Denial of server in Xen backend driver.

A malicious guest can cause the host networking stack to consume large
amounts of CPU by sending malformed requests to the Xen backend driver.


* CVE-2013-0190: stack corruption with Xen 32-bit paravirtualied guests.

Incorrect manipulation of the stack pointer in the error path for iret
failure with a 32-bit paravirtualized guest could result in stack
corruption.  This could be triggered by an unprivileged user in the
guest to cause a denial-of-service.


* CVE-2012-4530: Kernel information leak in binfmt execution.

Execution of a carefully crafted sequence of scripts could allow an
unprivileged user to leak kernel stack information to userspace.


* CVE-2012-4461: Kernel panic KVM XSAVE support.

On machines without XSAVE instruction support a malicious guest can
cause a host kernel panic via the SET_SREGS ioctl.


* CVE-2012-4398: Denial-of-service in kernel module loading.

A deadlock could occur in the Out of Memory (OOM) killer.  A process
could trigger this deadlock by consuming a large amount of memory, and
then causing request_module() to be called.  A local, unprivileged user
could use this flaw to cause a denial of service.

SUPPORT

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