[LSN-0024-1] Linux kernel vulnerability

[Benjamin M. Romer]

==========================================================================
Kernel Live Patch Security Notice LSN-0024-1
June 21, 2017

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

A security issue affects these releases of Ubuntu:

| Series           | Base kernel  | Arch     | flavors          |
|------------------+--------------+----------+------------------|
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | generic          |
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | lowlatency       |
| Ubuntu 14.04 LTS | 4.4.0        | amd64    | generic          |
| Ubuntu 14.04 LTS | 4.4.0        | amd64    | lowlatency       |

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that the stack guard page for processes in the Linux
kernel was not sufficiently large enough to prevent overlapping with the
heap. An attacker could leverage this with another vulnerability to execute
arbitrary code and gain administrative privileges (CVE-2017-1000364)

Update instructions:

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

| Kernel          | Version  | flavors                  |
|-----------------+----------+--------------------------|
| 4.4.0-21.37     | 24.2     | generic, lowlatency      |
| 4.4.0-22.39     | 24.2     | generic, lowlatency      |
| 4.4.0-22.40     | 24.2     | generic, lowlatency      |
| 4.4.0-24.43     | 24.2     | generic, lowlatency      |
| 4.4.0-28.47     | 24.2     | generic, lowlatency      |
| 4.4.0-31.50     | 24.2     | generic, lowlatency      |
| 4.4.0-34.53     | 24.2     | generic, lowlatency      |
| 4.4.0-36.55     | 24.2     | generic, lowlatency      |
| 4.4.0-38.57     | 24.2     | generic, lowlatency      |
| 4.4.0-42.62     | 24.2     | generic, lowlatency      |
| 4.4.0-43.63     | 24.2     | generic, lowlatency      |
| 4.4.0-45.66     | 24.2     | generic, lowlatency      |
| 4.4.0-47.68     | 24.2     | generic, lowlatency      |
| 4.4.0-51.72     | 24.2     | generic, lowlatency      |
| 4.4.0-53.74     | 24.2     | generic, lowlatency      |
| 4.4.0-57.78     | 24.2     | generic, lowlatency      |
| 4.4.0-59.80     | 24.2     | generic, lowlatency      |
| 4.4.0-62.83     | 24.2     | generic, lowlatency      |
| 4.4.0-63.84     | 24.2     | generic, lowlatency      |
| 4.4.0-64.85     | 24.2     | generic, lowlatency      |
| 4.4.0-66.87     | 24.2     | generic, lowlatency      |
| 4.4.0-67.88     | 24.2     | generic, lowlatency      |
| 4.4.0-70.91     | 24.2     | generic, lowlatency      |
| 4.4.0-71.92     | 24.2     | generic, lowlatency      |
| 4.4.0-72.93     | 24.2     | generic, lowlatency      |
| 4.4.0-75.96     | 24.2     | generic, lowlatency      |
| 4.4.0-77.98     | 24.2     | generic, lowlatency      |
| 4.4.0-78.99     | 24.2     | generic, lowlatency      |
| 4.4.0-79.100    | 24.2     | generic, lowlatency      |
| lts-4.4.0-21.37_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-22.39_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-22.40_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-24.43_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-28.47_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-31.50_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-34.53_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-36.55_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-38.57_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-42.62_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-45.66_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-47.68_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-51.72_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-53.74_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-57.78_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-59.80_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-62.83_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-63.84_14.04.2-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-64.85_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-66.87_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-70.91_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |
| lts-4.4.0-71.92_14.04.1-lts-xenial | 24.2 | generic, lowlatency      |

Additionally, you should install an updated kernel with these fixes and
reboot at your convienience.

References:
  CVE-2017-1000364