[Ksplice][Ubuntu 10.04 Updates] New updates available via Ksplice (Ubuntu-2.6.32-30.59)

[Keegan McAllister]

Synopsis: Ubuntu-2.6.32-30.59 can now be patched using Ksplice
CVEs: CVE-2010-4077 CVE-2010-4158 CVE-2010-4175 CVE-2010-4668

Systems running Ubuntu 10.04 Lucid can now use Ksplice to patch against
the latest Ubuntu kernel update, Ubuntu-2.6.32-30.59.


INSTALLING THE UPDATES

We recommend that all Ksplice Uptrack Ubuntu 10.04 Lucid users 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

* Denial of service in nfs_do_fsync.

The function nfs_do_fsync erroneously reports failure, causing system calls
like close() on an NFS-mounted file to hang indefinitely.


* CVE-2010-4668: Kernel panic in block subsystem.

By submitting certain I/O requests with 0 length, a local user could cause
a denial of service (kernel panic).


* CVE-2010-4158: Kernel information leak in socket filters.

The sk_run_filter function in the kernel's socket filter implementation
did not properly clear an array on the kernel stack, resulting in
uninitialized kernel stack memory being copied to user space.


* CVE-2010-4077: Kernel information leak in nozomi driver.

The TIOCGICOUNT device ioctl allows unprivileged users to read
uninitialized stack memory, because the "reserved" member of the
serial_icounter_struct struct declared on the stack is not altered or
zeroed before being copied back to the user.


* Improved fix for CVE-2010-4175.

Ubuntu provided a revised patch for CVE-2010-4175 for Lucid kernels.


* Data corruption on SCSI medium error.

Certain SCSI devices will report a bad sector without returning the data read
up to that point.  This case was handled incorrectly, resulting in
uninitialized buffer garbage being returned to userspace.


* Denial of service on insert of broken USB hub.

Inserting a USB hub with a broken configuration lacking transaction translators
could cause a crash in the kernel's USB stack.


* Crash on removal of ti_usb module.

Removing the ti_usb module while a TI 3410/5052 USB serial device is plugged in
could cause a kernel oops.


* Infinite loop in SAS error handling.

The error handler for Serial Attached SCSI devices could enter an infinite
loop, consuming all resources on at least one CPU.


* Use-after-free bug in NFS async I/O.

Under certain conditions, an asynchronous I/O request to a NFS-mounted
filesystem would be served by two different kernel subsystems, resulting
in a use-after-free bug and a kernel crash or memory corruption.


* Unexpected wakeup on ptrace detach.

Detaching from a traced process which is waiting on some kernel event could
cause an unexpected wakeup, resulting in an oops or other kernel misbehavior.


* Denial of service on init of prism2 WiFi with hostap_cs.

Inserting a prism2-based WiFi card can cause the hostap_cs
driver to call a sleeping function while holding a spinlock,
resulting in a system freeze or a BUG message.


* Error on adding device to RAID array without metadata.

Adding a device to a RAID array without metadata can fail erroneously.


* Memory corruption in multipath deactivation queueing.

The multi-device (e.g. RAID) multipath driver queues deactivation
events in a way which can cause memory corruption.


SUPPORT

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