[Ksplice][Virtuozzo 4.7 Updates] New updates available via Ksplice (2.6.32-042stab106.4)

[Quentin Casasnovas]

Synopsis: 2.6.32-042stab106.4 can now be patched using Ksplice
CVEs: CVE-2014-7822 CVE-2014-8159 CVE-2014-8160 CVE-2014-8369

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, 2.6.32-042stab106.4.

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-2014-8369: Denial-of-service in KVM page mapping.

Due to an incomplete fix for CVE-2014-3601, the KVM map pages function
miscalculates the number of pages to be un-pinned in case of a mapping
failure, which allows guest OS users to cause a denial-of-service by
corrupting the host memory.


* CVE-2014-8160: iptables rules by-pass when the protocol module is not loaded.

A flaw in the generic conntrack sub-system allows protocols that do not
have a protocol handler kernel module loaded to pass through the iptables
firewall even if explicitly denied by rule.


* CVE-2014-7822: Incorrect parameter validation in splice() system call.

An incorrect parameter validation in the splice() system call could allow
a local, unprivileged user to use this flaw to write past the maximum
file size, and thus crash the system.


* CVE-2014-8159: Privilege escalation in Infiniband userspace access.

Missing sanitization of userspace input to the Infiniband userspace
memory access subsystem could allow a local user with access to the
/dev/infiniband/uverbsX device nodes to crash the system or,
potentially, escalate their privileges on the system.


* Hardening of /proc/<pid>/pagemap to mitigate CVE-2015-0565.

The CAP_SYS_ADMIN capability is now required to access /proc/<pid>/pagemap
which exposes sensitive information which can be used for rowhammer-like
attacks (CVE-2015-0565).

SUPPORT

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