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Ubuntu Security Notice USN-3384-2

Ubuntu Security Notice USN-3384-2
Posted Aug 10, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3384-2 - USN-3384-1 fixed vulnerabilities in the Linux kernel for Ubuntu 17.04. This update provides the corresponding updates for the Linux Hardware Enablement kernel from Ubuntu 17.04 for Ubuntu 16.04 LTS. Andrey Konovalov discovered a race condition in the UDP Fragmentation Offload code in the Linux kernel. A local attacker could use this to cause a denial of service or execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, udp, vulnerability
systems | linux, ubuntu
advisories | CVE-2017-1000111, CVE-2017-1000112
MD5 | 3ec3aa7eb60579646c105eee729ff405

Ubuntu Security Notice USN-3384-2

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-3384-2
August 11, 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 versions:

Ubuntu 16.04 LTS:
linux-image-4.10.0-32-generic 4.10.0-32.36~16.04.1
linux-image-4.10.0-32-generic-lpae 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-hwe-16.04 4.10.0.32.34
linux-image-generic-lpae-hwe-16.04 4.10.0.32.34
linux-image-lowlatency-hwe-16.04 4.10.0.32.34

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:
https://www.ubuntu.com/usn/usn-3384-2
https://www.ubuntu.com/usn/usn-3384-1
CVE-2017-1000111, CVE-2017-1000112

Package Information:
https://launchpad.net/ubuntu/+source/linux-hwe/4.10.0-32.36~16.04.1

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