USN-2356-1: Linux kernel vulnerabilities

Ubuntu Security Notice USN-2356-1

23rd September, 2014

linux vulnerabilities

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

• Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

• linux - Linux kernel

Details

Jack Morgenstein reported a flaw in the page handling of the KVM (Kerenl

Virtual Machine) subsystem in the Linux kernel. A guest OS user could

exploit this flaw to cause a denial of service (host OS memory corruption)

or possibly have other unspecified impact on the host OS. (CVE-2014-3601)

Chris Evans reported an flaw in the Linux kernel's handling of iso9660

(compact disk filesystem) images. An attacker who can mount a custom

iso9660 image either via a CD/DVD drive or a loopback mount could cause a

denial of service (system crash or reboot). (CVE-2014-5471)

Chris Evans reported an flaw in the Linux kernel's handling of iso9660

(compact disk filesystem) images. An attacker who can mount a custom

iso9660 image, with a self-referential CL entry, either via a CD/DVD drive

or a loopback mount could cause a denial of service (unkillable mount

process). (CVE-2014-5472)

Update instructions

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

Ubuntu 12.04 LTS:

linux-image-3.2.0-69-powerpc64-smp 3.2.0-69.103

linux-image-3.2.0-69-powerpc-smp 3.2.0-69.103

linux-image-3.2.0-69-generic-pae 3.2.0-69.103

linux-image-3.2.0-69-virtual 3.2.0-69.103

linux-image-3.2.0-69-highbank 3.2.0-69.103

linux-image-3.2.0-69-omap 3.2.0-69.103

linux-image-3.2.0-69-generic 3.2.0-69.103

To update your system, please follow these instructions: http://bit.ly/1aJDvTw.

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 automatically

perform this as well.

References

CVE-2014-3601, CVE-2014-5471, CVE-2014-5472

from Ubuntu Security Notices http://bit.ly/1B4Cvp4