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Ubuntu Security Notice USN-2640-1

Ubuntu Security Notice USN-2640-1
Posted Jun 15, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2640-1 - Philip Pettersson discovered a privilege escalation when using overlayfs mounts inside of user namespaces. A local user could exploit this flaw to gain administrative privileges on the system.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2015-1328
SHA-256 | 122682e2079f57b9d20ea0a53cbcf1fa27541a19754e2ff8123b4183c67919ef

Ubuntu Security Notice USN-2640-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2640-1
June 15, 2015

linux vulnerability
============================================================================

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

- Ubuntu 12.04 LTS

Summary:

The system could be made to run programs as an administrator.

Software Description:
- linux: Linux kernel

Details:

Philip Pettersson discovered a privilege escalation when using overlayfs
mounts inside of user namespaces. A local user could exploit this flaw to
gain administrative privileges on the system.

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-86-generic 3.2.0-86.123
linux-image-3.2.0-86-generic-pae 3.2.0-86.123
linux-image-3.2.0-86-highbank 3.2.0-86.123
linux-image-3.2.0-86-omap 3.2.0-86.123
linux-image-3.2.0-86-powerpc-smp 3.2.0-86.123
linux-image-3.2.0-86-powerpc64-smp 3.2.0-86.123
linux-image-3.2.0-86-virtual 3.2.0-86.123

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:
http://www.ubuntu.com/usn/usn-2640-1
CVE-2015-1328

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.2.0-86.123
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