==========================================================================
Kernel Live Patch Security Notice 0054-1
August 28, 2019

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

A security issue affects these releases of Ubuntu:

| Series           | Base kernel  | Arch     | flavors          |
|------------------+--------------+----------+------------------|
| Ubuntu 18.04 LTS | 4.15.0       | amd64    | generic          |
| Ubuntu 18.04 LTS | 4.15.0       | amd64    | lowlatency       |
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | generic          |
| Ubuntu 16.04 LTS | 4.4.0        | amd64    | lowlatency       |
| Ubuntu 16.04 LTS | 4.15.0       | amd64    | generic          |
| Ubuntu 16.04 LTS | 4.15.0       | amd64    | lowlatency       |

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that the USB video device class implementation in the
Linux kernel did not properly validate control bits, resulting in an out of
bounds buffer read. A local attacker could use this to possibly expose
sensitive information (kernel memory). (CVE-2019-2101)

It was discovered that the Marvell Wireless LAN device driver in the Linux
kernel did not properly validate the BSS descriptor. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-3846)

It was discovered that a heap buffer overflow existed in the Marvell
Wireless LAN device driver for the Linux kernel. An attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-10126)

It was discovered that the PowerPC dlpar implementation in the Linux kernel
did not properly check for allocation errors in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-12614)

It was discovered that a NULL pointer dereference vulnerabilty existed in
the Near-field communication (NFC) implementation in the Linux kernel. An
attacker could use this to cause a denial of service (system crash). 
(CVE-2019-12818)

It was discovered that the MDIO bus devices subsystem in the Linux kernel
improperly dropped a device reference in an error condition, leading to a
use-after-free. An attacker could use this to cause a denial of service
(system crash). (CVE-2019-12819)

It was discovered that a NULL pointer dereference vulnerability existed in
the Near-field communication (NFC) implementation in the Linux kernel. A
local attacker could use this to cause a denial of service (system crash). 
(CVE-2019-12984)

Jann Horn discovered that the ptrace implementation in the Linux kernel did
not properly record credentials in some situations. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2019-13272)

Update instructions:

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

| Kernel                   | Version  | flavors                  |
|--------------------------+----------+--------------------------|
| 4.4.0-148.174            | 54.1     | lowlatency, generic      |
| 4.4.0-150.176            | 54.1     | generic, lowlatency      |
| 4.4.0-151.178            | 54.1     | lowlatency, generic      |
| 4.4.0-154.181            | 54.1     | lowlatency, generic      |
| 4.4.0-157.185            | 54.1     | lowlatency, generic      |
| 4.15.0-50.54             | 54.2     | generic, lowlatency      |
| 4.15.0-50.54~16.04.1     | 54.2     | generic, lowlatency      |
| 4.15.0-51.55             | 54.2     | generic, lowlatency      |
| 4.15.0-51.55~16.04.1     | 54.2     | generic, lowlatency      |
| 4.15.0-52.56             | 54.2     | lowlatency, generic      |
| 4.15.0-52.56~16.04.1     | 54.2     | generic, lowlatency      |
| 4.15.0-54.58             | 54.2     | generic, lowlatency      |
| 4.15.0-54.58~16.04.1     | 54.2     | generic, lowlatency      |
| 4.15.0-55.60             | 54.2     | generic, lowlatency      |

References:
  CVE-2018-1129, CVE-2019-2101, CVE-2019-3846, CVE-2019-10126, 
  CVE-2019-12614, CVE-2019-12818, CVE-2019-12819, CVE-2019-12984, 
  CVE-2019-13272


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