exploit the possibilities

Kernel Live Patch Security Notice LSN-0024-1

Kernel Live Patch Security Notice LSN-0024-1
Posted Jun 22, 2017
Authored by Benjamin M. Romer

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.

tags | advisory, arbitrary, kernel
systems | linux
advisories | CVE-2017-1000364
MD5 | 802d5d0c1e8f0c95c047a7f9331ccb3d

Kernel Live Patch Security Notice LSN-0024-1

Change Mirror Download
==========================================================================
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

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