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Kernel Live Patch Security Notice LSN-0033-1

Kernel Live Patch Security Notice LSN-0033-1
Posted Dec 9, 2017
Authored by Benjamin M. Romer

Mohamed Ghannam discovered that a use-after-free vulnerability existed in the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Linux kernel did not properly handle copy-on- write of transparent huge pages. A local attacker could use this to cause a denial of service (application crashes) or possibly gain administrative privileges. It was discovered that a race condition existed in the ALSA subsystem of the Linux kernel when creating and deleting a port via ioctl(). A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2017-1000405, CVE-2017-15265, CVE-2017-16939
MD5 | ca77a2333d4c9ee49fdd8d0056475a48

Kernel Live Patch Security Notice LSN-0033-1

Change Mirror Download
==========================================================================
Kernel Live Patch Security Notice LSN-0033-1
December 07, 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:

Mohamed Ghannam discovered that a use-after-free vulnerability existed in
the Netlink subsystem (XFRM) in the Linux kernel. A local attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16939)

It was discovered that the Linux kernel did not properly handle copy-on-
write of transparent huge pages. A local attacker could use this to cause a
denial of service (application crashes) or possibly gain administrative
privileges. (CVE-2017-1000405)

It was discovered that a race condition existed in the ALSA subsystem of
the Linux kernel when creating and deleting a port via ioctl(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-15265)

Update instructions:

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

| Kernel | Version | flavors |
|-----------------+----------+--------------------------|
| 4.4.0-101.124 | 33.2 | generic, lowlatency |
| 4.4.0-21.37 | 33.2 | generic, lowlatency |
| 4.4.0-22.39 | 33.2 | generic, lowlatency |
| 4.4.0-22.40 | 33.2 | generic, lowlatency |
| 4.4.0-24.43 | 33.2 | generic, lowlatency |
| 4.4.0-28.47 | 33.2 | generic, lowlatency |
| 4.4.0-31.50 | 33.2 | generic, lowlatency |
| 4.4.0-34.53 | 33.2 | generic, lowlatency |
| 4.4.0-36.55 | 33.2 | generic, lowlatency |
| 4.4.0-38.57 | 33.2 | generic, lowlatency |
| 4.4.0-42.62 | 33.2 | generic, lowlatency |
| 4.4.0-43.63 | 33.2 | generic, lowlatency |
| 4.4.0-45.66 | 33.2 | generic, lowlatency |
| 4.4.0-47.68 | 33.2 | generic, lowlatency |
| 4.4.0-51.72 | 33.2 | generic, lowlatency |
| 4.4.0-53.74 | 33.2 | generic, lowlatency |
| 4.4.0-57.78 | 33.2 | generic, lowlatency |
| 4.4.0-59.80 | 33.2 | generic, lowlatency |
| 4.4.0-62.83 | 33.2 | generic, lowlatency |
| 4.4.0-63.84 | 33.2 | generic, lowlatency |
| 4.4.0-64.85 | 33.2 | generic, lowlatency |
| 4.4.0-66.87 | 33.2 | generic, lowlatency |
| 4.4.0-67.88 | 33.2 | generic, lowlatency |
| 4.4.0-70.91 | 33.2 | generic, lowlatency |
| 4.4.0-71.92 | 33.2 | generic, lowlatency |
| 4.4.0-72.93 | 33.2 | generic, lowlatency |
| 4.4.0-75.96 | 33.2 | generic, lowlatency |
| 4.4.0-77.98 | 33.2 | generic, lowlatency |
| 4.4.0-78.99 | 33.2 | generic, lowlatency |
| 4.4.0-79.100 | 33.2 | generic, lowlatency |
| 4.4.0-81.104 | 33.2 | generic, lowlatency |
| 4.4.0-83.106 | 33.2 | generic, lowlatency |
| 4.4.0-87.110 | 33.2 | generic, lowlatency |
| 4.4.0-89.112 | 33.2 | generic, lowlatency |
| 4.4.0-91.114 | 33.2 | generic, lowlatency |
| 4.4.0-92.115 | 33.2 | generic, lowlatency |
| 4.4.0-93.116 | 33.2 | generic, lowlatency |
| 4.4.0-96.119 | 33.2 | generic, lowlatency |
| 4.4.0-97.120 | 32.2 | generic, lowlatency |
| 4.4.0-97.120 | 33.2 | generic, lowlatency |
| 4.4.0-98.121 | 33.2 | generic, lowlatency |
| lts-4.4.0-101.124_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-21.37_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-22.39_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-22.40_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-24.43_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-28.47_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-31.50_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-34.53_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-36.55_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-38.57_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-42.62_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-45.66_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-47.68_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-51.72_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-53.74_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-57.78_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-59.80_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-62.83_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-63.84_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency |
| lts-4.4.0-64.85_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-66.87_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-67.88_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-70.91_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-71.92_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-72.93_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-75.96_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-78.99_14.04.2-lts-xenial | 14.04.2 | generic, lowlatency |
| lts-4.4.0-79.100_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-81.104_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-83.106_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-87.110_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-89.112_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-91.114_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-92.115_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-93.116_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-96.119_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-97.120_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |
| lts-4.4.0-98.121_14.04.1-lts-xenial | 14.04.1 | generic, lowlatency |

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

References:
CVE-2017-1000405, CVE-2017-15265, CVE-2017-16939

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