Home / mailings [USN-1389-1] Linux kernel vulnerabilities
Posted on 06 March 2012
Ubuntu Security==========================
==========================
========================
Ubuntu Security Notice USN-1389-1
March 06, 2012
linux vulnerabilities
==========================
==========================
========================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 10.04 LTS
Summary:
Several security issues were fixed in the kernel.
Software Description:
- linux: Linux kernel
Details:
Paolo Bonzini discovered a flaw in Linux's handling of the SG_IO ioctl
command. A local user, or user in a VM could exploit this flaw to bypass
restrictions and gain read/write access to all data on the affected block=
device. (CVE-2011-4127)
Sasha Levin discovered a flaw in the permission checking for device
assignments requested via the kvm ioctl in the Linux kernel. A local user=
could use this flaw to crash the system causing a denial of service.
(CVE-2011-4347)
A flaw was found in KVM's Programmable Interval Timer (PIT). When a virtu=
al
interrupt control is not available a local user could use this to cause a=
denial of service by starting a timer. (CVE-2011-4622)
A flaw was discovered in the XFS filesystem. If a local user mounts a
specially crafted XFS image it could potential execute arbitrary code on
the system. (CVE-2012-0038)
Louis Rilling discovered a flaw in Linux kernel's clone command when
CLONE_IO is specified. An unprivileged local user could exploit this to
cause a denial of service. (CVE-2012-0879)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 10.04 LTS:
linux-image-2.6.32-39-386 2.6.32-39.86
linux-image-2.6.32-39-generic 2.6.32-39.86
linux-image-2.6.32-39-generic-pae 2.6.32-39.86
linux-image-2.6.32-39-ia64 2.6.32-39.86
linux-image-2.6.32-39-lpia 2.6.32-39.86
linux-image-2.6.32-39-powerpc 2.6.32-39.86
linux-image-2.6.32-39-powerpc-smp 2.6.32-39.86
linux-image-2.6.32-39-powerpc64-smp 2.6.32-39.86
linux-image-2.6.32-39-preempt 2.6.32-39.86
linux-image-2.6.32-39-server 2.6.32-39.86
linux-image-2.6.32-39-sparc64 2.6.32-39.86
linux-image-2.6.32-39-sparc64-smp 2.6.32-39.86
linux-image-2.6.32-39-versatile 2.6.32-39.86
linux-image-2.6.32-39-virtual 2.6.32-39.86
After a standard system update you need to reboot your computer to make
all the necessary changes.
ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic=
,
linux-server, linux-powerpc), a standard system upgrade will automaticall=
y
perform this as well.
References:
http://www.ubuntu.com/usn/usn-1389-1
CVE-2011-4127, CVE-2011-4347, CVE-2011-4622, CVE-2012-0038,
CVE-2012-0879
Package Information:
https://launchpad.net/ubuntu/+source/linux/2.6.32-39.86
--------------040303020006080907060200
Content-Type: text/plain; charset=UTF-8;
name="Attached Message Part"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="Attached Message Part"
--------------040303020006080907060200--
------------
