==========================================================================
Ubuntu Security Notice USN-3522-1
January 09, 2018
linux, linux-aws, linux-euclid, linux-kvm vulnerability
==========================================================================
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: Linux kernel
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-euclid: Linux kernel for Intel Euclid systems
– linux-kvm: Linux kernel for cloud environments
Details:
Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS:
linux-image-4.4.0-1015-kvm 4.4.0-1015.20
linux-image-4.4.0-1047-aws 4.4.0-1047.56
linux-image-4.4.0-108-generic 4.4.0-108.131
linux-image-4.4.0-108-lowlatency 4.4.0-108.131
linux-image-4.4.0-9021-euclid 4.4.0-9021.22
linux-image-aws 4.4.0.1047.49
linux-image-euclid 4.4.0.9021.21
linux-image-generic 4.4.0.108.113
linux-image-kvm 4.4.0.1015.15
linux-image-lowlatency 4.4.0.108.113
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-3522-1
CVE-2017-5754
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.4.0-108.131
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1047.56
https://launchpad.net/ubuntu/+source/linux-euclid/4.4.0-9021.22
https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1015.20
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==========================================================================
Ubuntu Security Notice USN-3522-2
January 09, 2018
linux-lts-xenial, linux-aws vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
– linux-aws: Linux kernel for Amazon Web Services (AWS) systems
– linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
Details:
USN-3522-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
LTS. This update provides the corresponding updates for the Linux
Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
14.04 LTS.
Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
linux-image-4.4.0-1009-aws 4.4.0-1009.9
linux-image-4.4.0-108-generic 4.4.0-108.131~14.04.1
linux-image-4.4.0-108-lowlatency 4.4.0-108.131~14.04.1
linux-image-aws 4.4.0.1009.9
linux-image-generic-lts-xenial 4.4.0.108.91
linux-image-lowlatency-lts-xenial 4.4.0.108.91
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-3522-2
https://www.ubuntu.com/usn/usn-3522-1
CVE-2017-5754
Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1009.9
https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-108.131~14.04.1
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==========================================================================
Ubuntu Security Notice USN-3524-1
January 09, 2018
linux vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in the Linux kernel.
Software Description:
– linux: Linux kernel
Details:
Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 14.04 LTS:
linux-image-3.13.0-139-generic 3.13.0-139.188
linux-image-3.13.0-139-lowlatency 3.13.0-139.188
linux-image-generic 3.13.0.139.148
linux-image-lowlatency 3.13.0.139.148
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-3524-1
CVE-2017-5754
Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-139.188
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—
==========================================================================
Kernel Live Patch Security Notice LSN-0034-1
January 9, 2018
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:
On January 9, fixes for CVE-2017-5754 were released into the Ubuntu Xenial
kernel version 4.4.0-108.131. This CVE, also known as “Meltdown,” is a security
vulnerability caused by flaws in the design of speculative execution
hardware in the computer’s CPU.
Details on the vulnerability and our response can be found here:
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SpectreAndMeltdown
Due to the high complexity of the fixes, we are unable to livepatch this
CVE. Please plan to reboot into kernel version 4.4.0-108.131 or newer as soon
as possible.
Software Description:
– linux: Linux kernel
Update instructions:
The problem can be corrected by installing an updated kernel with these
fixes and rebooting.
References:
CVE-2017-5754
—
