Home / mailings

PDF

[USN-1696-2] Linux kernel regression

Posted on 01 February 2013
Ubuntu Security

==========================
==========================
========================
Ubuntu Security Notice USN-1696-2
February 01, 2013

linux regression
==========================
==========================
========================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

USN-1696-1 introduced a regression in the Linux kernel.

Software Description:
- linux: Linux kernel

Details:

USN-1696-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated=

regression inotify/fanotify stopped working after upgrading. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Jon Howell reported a flaw in the Linux kernel's KVM (Kernel-based virtu=
al
machine) subsystem's handling of the XSAVE feature. On hosts, using qemu=

userspace, without the XSAVE feature an unprivileged local attacker coul=
d
exploit this flaw to crash the system. (CVE-2012-4461)
=20
A flaw was discovered in the Linux kernel's handling of script execution=

when module loading is enabled. A local attacker could exploit this flaw=
to
cause a leak of kernel stack contents. (CVE-2012-4530)
=20
Florian Weimer discovered that hypervkvpd, which is distributed in the
Linux kernel, was not correctly validating source addresses of netlink
packets. An untrusted local user can cause a denial of service by causin=
g
hypervkvpd to exit. (CVE-2012-5532)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.04 LTS:
linux-image-3.2.0-37-generic 3.2.0-37.58
linux-image-3.2.0-37-generic-pae 3.2.0-37.58
linux-image-3.2.0-37-highbank 3.2.0-37.58
linux-image-3.2.0-37-omap 3.2.0-37.58
linux-image-3.2.0-37-powerpc-smp 3.2.0-37.58
linux-image-3.2.0-37-powerpc64-smp 3.2.0-37.58
linux-image-3.2.0-37-virtual 3.2.0-37.58

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-1696-2
http://www.ubuntu.com/usn/usn-1696-1
https://launchpad.net/bugs/1101666

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-37.58


--------------030602090802010300010609
Content-Type: text/plain; charset=UTF-8;
name="Attached Message Part"
Content-Transfer-Encoding: base64
Content-Disposition: attachment;
filename="Attached Message Part"


--------------030602090802010300010609--

------------

 

TOP