[Ksplice][Ubuntu-11.04-Updates] New updates available via Ksplice (USN-1432-1)

[Jamie Iles]

Synopsis: USN-1432-1 can now be patched using Ksplice
CVEs: CVE-2012-2100/CVE-2009-4307 CVE-2011-4086 CVE-2012-1090

Systems running Ubuntu 11.04 Natty can now use Ksplice to patch
against the latest Ubuntu Security Notice, USN-1432-1.

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack on Ubuntu 11.04 Natty
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-2012-1090: Denial of service in the CIFS filesystem reference counting.

Under certain circumstances, the CIFS filesystem would open a file on
lookup. If the file was determined later to be a FIFO or any other
special file the file handle would be leaked, leading to reference
counting mismatch and a kernel OOPS on unmount.

An unprivileged local user could use this flaw to crash the system.


* CVE-2011-4086: Denial of service in journaling block device.

The journal block device assumed that a buffer marked as unwritten
or delay could be live without checking if the buffer was mapped.

An unprivileged local user could use this flaw to crash the system.


* CVE-2012-2100, Improved fix to CVE-2009-4307.

The original vendor fix to CVE-2009-4307 did not cover all cases,
especially on x86.

SUPPORT

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