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Ubuntu Security Notice USN-2586-1

Ubuntu Security Notice USN-2586-1
Posted Apr 30, 2015
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2586-1 - It was discovered that the Linux kernel's IPv6 networking stack has a flaw that allows using route advertisement (RA) messages to set the 'hop_limit' to values that are too low. An unprivileged attacker on a local network could exploit this flaw to cause a denial of service (IPv6 messages dropped).

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2015-2922
SHA-256 | 19a304728639f12fad4af354e58d2750b5c6c0b3b7ead07ae4bc438aca0151e8

Ubuntu Security Notice USN-2586-1

Change Mirror Download
============================================================================
Ubuntu Security Notice USN-2586-1
April 30, 2015

linux-ti-omap4 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-ti-omap4: Linux kernel for OMAP4

Details:

It was discovered that the Linux kernel's IPv6 networking stack has a flaw
that allows using route advertisement (RA) messages to set the 'hop_limit'
to values that are too low. An unprivileged attacker on a local network
could exploit this flaw to cause a denial of service (IPv6 messages
dropped).

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.2.0-1463-omap4 3.2.0-1463.83

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-2586-1
CVE-2015-2922

Package Information:
https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.2.0-1463.83
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