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Ubuntu Security Notice USN-2975-2

Ubuntu Security Notice USN-2975-2
Posted May 16, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2975-2 - USN-2975-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04 LTS. This update provides the corresponding updates for the Linux Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu 12.04 LTS. Philip Pettersson discovered that the Linux kernel's ASN.1 DER decoder did not properly process certificate files with tags of indefinite length. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2016-0758
SHA-256 | feac0eb25f9c1cd3fa095cee054213a408415e169c7b4778f95545c5dacb38c1

Ubuntu Security Notice USN-2975-2

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Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-2975-2
May 16, 2016

linux-lts-trusty vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.04 LTS

Summary:

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

Software Description:
- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise

Details:

USN-2975-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
12.04 LTS.

Philip Pettersson discovered that the Linux kernel's ASN.1 DER decoder did
not properly process certificate files with tags of indefinite length. A
local unprivileged attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code with administrative
privileges.

Update instructions:

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

Ubuntu 12.04 LTS:
linux-image-3.13.0-86-generic 3.13.0-86.131~precise1
linux-image-3.13.0-86-generic-lpae 3.13.0-86.131~precise1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-trusty, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2975-2
http://www.ubuntu.com/usn/usn-2975-1
CVE-2016-0758

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-86.131~precise1
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