Linux Lite Forums

General => Security & Bug Fixes => Topic started by: Coastie on June 29, 2016, 02:35:35 PM

Title: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Coastie on June 29, 2016, 02:35:35 PM
Is this a problem in LL 3.0? http://news.softpedia.com/news/canonical-patches-seven-linux-kernel-vulnerabilities-in-ubuntu-16-04-update-now-505720.shtml I have been looking for something about a kernel update when I install updates every day since I read about this.  :-\  (http://news.softpedia.com/news/canonical-patches-seven-linux-kernel-vulnerabilities-in-ubuntu-16-04-update-now-505720.shtml)

Quote
Today, June 27, 2016, Canonical has published a new security notice to inform users of the Ubuntu 16.04 LTS (Xenial Xerus) operating system about the availability of an important kernel update. According to Ubuntu Security Notice USN-3016-1 (http://www.ubuntu.com/usn/usn-3016-1/), a total of seven Linux kernel vulnerabilities have been discovered and fixed in the upstream Linux 4.4 LTS kernel by various developers. Therefore, Canonical has updated the kernel packages for its Ubuntu 16.04 LTS (Xenial Xerus) release to version linux-image-4.4.0-28 (4.4.0-28.47).
Among the patches, we can notice those for some validation issues with Linux kernel's netfilter implementation, an information leak in the core USB implementation, an information leak in the timer handling implementation, an information leak in the X.25 Call Request handling, and a bug in the Transparent Inter-process Communication (TIPC) implementation.
Detailed information and the respective CVEs are available in the security notice for your reading pleasure. The problems affect Ubuntu 16.04 LTS and all of its official derivatives, including Kubuntu 16.04 LTS, Xubuntu 16.04 LTS, Lubuntu 16.04 LTS, Ubuntu MATE 16.04 LTS, Ubuntu GNOME 16.04 LTS, Ubuntu Kylin 16.04 LTS, and Ubuntu Studio 16.04 LTS.
 Ubuntu 16.04 LTS users need to update right now If you are using the Ubuntu 16.04 LTS (Xenial Xerus) operating system, Canonical urges you to update as soon as possible. The new kernel version, linux-image-4.4.0-28 (4.4.0-28.47), is now live in the main software repositories. To update, open the Software Updater utility from the Unity Dash and apply all available updates by clicking on the "Install All" button.
For more details, please also visit https://wiki.ubuntu.com/Security/Upgrades (https://wiki.ubuntu.com/Security/Upgrades). Keep in mind, though, that Ubuntu 16.04 LTS (Xenial Xerus) doesn't feature the live patching technology in its kernel packages, so you'll need to reboot your system for the new version to take effect. Also, you will have to rebuild any third-party kernel module you might have installed.
Update: Canonical has also released today the Ubuntu Security Notice USN-3017-1 (http://www.ubuntu.com/usn/usn-3017-1/) bulletin to inform the community that all the issues patched in the kernel packages of Ubuntu 16.04 LTS (Xenial Xerus) should be of interest to users of Ubuntu 15.10 (Wily Werewolf) as well. Ubuntu 15.10 users need to update their systems to linux-image-4.2.0-41 (4.2.0-41.48) as soon as possible. Ubuntu 14.04 LTS and Ubuntu 12.04 LTS users are affected as well (http://news.softpedia.com/news/canonical-releases-new-kernel-update-for-ubuntu-12-04-lts-and-ubuntu-14-04-lts-505735.shtml).

Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Wirezfree on June 29, 2016, 02:57:11 PM
Hi,

The way I read this...
Affects all Ubuntu based systems from 12.04 upwards, so LL 2.x & 3.x, but only if you have Kernel 4.4 and/or upwards..??. maybe..??
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Coastie on June 29, 2016, 05:01:42 PM
uname -a shows I am using kernel 4.4.0-28-generic  :'(
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on June 29, 2016, 11:07:23 PM
To update, open a terminal do:

Code: [Select]
sudo apt-get update
Code: [Select]
sudo apt-get install linux-generic
Reboot.

To easy :)

Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Coastie on June 29, 2016, 11:50:26 PM
Followed your instructions, Jerry. Reported I was using the latest kernel. Rebooted and uname -a still shows I am using kernel 4.4.0-28-generic  :-\
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on June 29, 2016, 11:51:47 PM
uname -a should show you WAY more than that, on my machine uname -a produces:

Code: [Select]
jerry@z800:~$ uname -a
Linux z800 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
jerry@z800:~$
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Coastie on June 30, 2016, 12:32:09 AM
It does.

Code: [Select]
coastie@ASUS-K30BF-M32BF:~$ uname -a
Linux ASUS-K30BF-M32BF 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
coastie@ASUS-K30BF-M32BF:~$

Since it says the same as yours, does this mean LL does not have this kernel vulnerability?  :-\
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: LL-user on June 30, 2016, 12:56:53 AM
Is this a problem in LL 3.0? http://news.softpedia.com/news/canonical-patches-seven-linux-kernel-vulnerabilities-in-ubuntu-16-04-update-now-505720.shtml I have been looking for something about a kernel update when I install updates every day since I read about this.  :-\  (http://news.softpedia.com/news/canonical-patches-seven-linux-kernel-vulnerabilities-in-ubuntu-16-04-update-now-505720.shtml)

Quote
Today, June 27, 2016, Canonical has published a new security notice to inform users of the Ubuntu 16.04 LTS (Xenial Xerus) operating system about the availability of an important kernel update. According to Ubuntu Security Notice USN-3016-1 (http://www.ubuntu.com/usn/usn-3016-1/), a total of seven Linux kernel vulnerabilities have been discovered and fixed in the upstream Linux 4.4 LTS kernel by various developers. Therefore, Canonical has updated the kernel packages for its Ubuntu 16.04 LTS (Xenial Xerus) release to version linux-image-4.4.0-28 (4.4.0-28.47).
...

Hi Coastie,

Referring to your quote, you can see that the patched kernel. i.e. the one with the vulnerabilities fixed is linux-image-4.4.0-28 (4.4.0-28.47) which you seemed to have installed :)
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on June 30, 2016, 01:16:12 AM
LLUser is correct.

Sent from my phone using Tapatalk

Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: banko on June 30, 2016, 02:24:08 AM
Thanks Jerry  :)
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Coastie on June 30, 2016, 09:40:49 AM
LLUser is correct.

Thanks LLUser and Jerry.  :D
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: bfb on June 30, 2016, 02:10:04 PM
I have the 4.4.0 lite kernel but in lite 2.8.

Quote
uname -a
Linux bs-Aspire-V5-573PG 4.4.0-linuxlite #1 SMP Mon Jan 11 15:48:57 NZDT 2016 x86_64 x86_64 x86_64 GNU/Linux

Do I need to upgrade?  and how, since 2.8 is not based on the 16.04 repositories so if I do "sudo apt-get update" I will not get the new kernel, and 'sudo apt-get install linux-generic' will only install older packages...
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on July 17, 2016, 12:24:32 AM
Those who upgraded last time, will get this automatically in their updates - http://news.softpedia.com/news/canonical-patches-linux-kernel-vulnerability-in-all-supported-ubuntu-oses-506341.shtml Those who didn't refer to Post #3 in this thread for a how to.
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: bfb on July 18, 2016, 04:38:25 PM
That works for those on Lite 3.0 as I am on one machine.
I doesn't answer my query on how to get the latest 4.4 kernel if you are on 2.8, which is the case with another of my machines which has the 4.4 lite kernel ..
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: torreydale on July 18, 2016, 05:19:10 PM
4.4.0 is not 4.4.0-28.  And as you stated, you are on LL 2.8 instead of LL 3.0.  So based on the announcement, it appears that you don't have the same exposure to the vulnerabilities.
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: JmaCWQ on July 19, 2016, 05:01:56 AM
It says at the bottom of the announcement in post #1 "Ubuntu 14.04 LTS and Ubuntu 12.04 LTS users are affected as well. (http://news.softpedia.com/news/canonical-releases-new-kernel-update-for-ubuntu-12-04-lts-and-ubuntu-14-04-lts-505735.shtml)"
I take that to mean LL 2.8 needs this kernel upgrade as well.

Can somebody please confirm if the upgrade is required in 2.8 or not?
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on July 19, 2016, 06:11:55 AM
12.04 = 1.x Series
14.04 = 2.x Series
16.04 = 3.x Series
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: JmaCWQ on July 19, 2016, 06:25:56 AM
Thanks Jerry  8)
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: Jerry on July 19, 2016, 06:28:11 AM
No problemo :)
Title: Re: Kernel Vulnerabilities in Ubuntu 16.04
Post by: bfb on July 19, 2016, 09:35:30 AM
Thanks Torrydale.