USN-3384-2: Linux kernel (HWE) vulnerabilities

Ubuntu Security Notice USN-3384-2

10th August, 2017

linux-hwe vulnerabilities

A security issue affects these releases of Ubuntu and its
derivatives:

Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software description

linux-hwe
– Linux hardware enablement (HWE) kernel

Details

USN-3384-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04.
This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 17.04 for Ubuntu
16.04 LTS.

Andrey Konovalov discovered a race condition in the UDP Fragmentation
Offload (UFO) code in the Linux kernel. A local attacker could use this to
cause a denial of service or execute arbitrary code. (CVE-2017-1000112)

Andrey Konovalov discovered a race condition in AF_PACKET socket option
handling code in the Linux kernel. A local unprivileged attacker could use
this to cause a denial of service or possibly execute arbitrary code.
(CVE-2017-1000111)

Update instructions

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

Ubuntu 16.04 LTS:: linux-image-4.10.0-32-generic-lpae

4.10.0-32.36~16.04.1; linux-image-generic-hwe-16.04

4.10.0.32.34; linux-image-lowlatency-hwe-16.04

4.10.0.32.34; linux-image-4.10.0-32-generic

4.10.0-32.36~16.04.1; linux-image-4.10.0-32-lowlatency

4.10.0-32.36~16.04.1; linux-image-generic-lpae-hwe-16.04

4.10.0.32.34

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

CVE-2017-1000111,

CVE-2017-1000112

Source: USN-3384-2: Linux kernel (HWE) vulnerabilities

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