[Ksplice][Virtuozzo 4 Updates] New updates available via Ksplice (CU-2.6.18-028stab094.3)

[Tim Abbott]

Synopsis: CU-2.6.18-028stab094.3 can now be patched using Ksplice
CVEs: CVE-2011-2482 CVE-2011-2491 CVE-2011-2495 CVE-2011-2517
Red Hat Security Advisory Severity: Important

Systems running Virtuozzo 4 or the OpenVZ RHEL 5 kernel can now use
Ksplice to patch against the latest Parallels Virtuozzo Containers
kernel security update, CU-2.6.18-028stab094.3.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on Virtuozzo 4 or
OpenVZ on RHEL 5 install these updates.  You can install these updates
by running:

# /usr/sbin/uptrack-upgrade -y

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 additional action.


DESCRIPTION

* Crash when processing netfilter bridging traffic.

Ethernet control buffer packets were not zeroed properly during the
processing of netfilter bridging traffic, causing a kernel crash.


* CVE-2011-2517: Buffer overflow in 802.11 netlink interface.

The nl80211_trigger_scan function failed to check for a valid SSID
length, leading to denial of service via buffer
overflow.


* Hangs using direct I/O with XFS filesystem.

An error path in the xfs_write function did not correctly unlock the
inode mutex, resulting in hung task timeouts.


* CVE-2011-2482: Remote denial of service vulnerability in SCTP.

A NULL pointer dereference flaw was found in the Linux kernel's Stream
Control Transmission Protocol (SCTP) implementation.  A remote
attacker could send a specially-crafted SCTP packet to a target
system, resulting in a denial of service. (CVE-2011-2482, Important).


* CVE-2011-2495: Information leak in /proc/PID/io.

/proc/[PID]/io is world-readable by default. Previously, these files
could be read without any further restrictions. A local, unprivileged
user could read these files, belonging to other, possibly privileged
processes to gather confidential information, such as the length of a
password used in a process.


* CVE-2011-2491: Local denial of service in NLM subsystem.

A flaw in the client-side NLM implementation could allow a local,
unprivileged user to cause a denial of service.

SUPPORT

Ksplice support is available at support at ksplice.com or +1 765-577-5423.