[Ksplice][Virtuozzo 4.7 Updates] New updates available via Ksplice (CU-2.6.32-042stab074.10)

[Michael Ploujnikov]

Synopsis: CU-2.6.32-042stab074.10 can now be patched using Ksplice
CVEs: CVE-2012-4398 CVE-2012-4461 CVE-2012-4530 CVE-2013-0871

Systems running Virtuozzo 4.7 or the OpenVZ RHEL 6 kernel can now use
Ksplice to patch against the latest Parallels Virtuozzo Containers 4.7
kernel security update, CU-2.6.32-042stab074.10.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on Virtuozzo 4.7 or
OpenVZ on RHEL 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-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-2012-4530: 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-2012-4398: 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.


* CVE-2013-0871: Privilege escalation in PTRACE_SETREGS.

A race condition in ptrace can lead to kernel stack corruption allowing
an attacker to control execution and possible escalate privileges.

SUPPORT

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