ESB-2018.1811.2 - UPDATE [Ubuntu] amd64-microcode: Access privileged data - Existing account 2018-07-06

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                              ESB-2018.1811.2
                           AMD Microcode update
                                6 July 2018

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           amd64-microcode
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5715  

Reference:         ASB-2018.0116
                   ASB-2018.0033
                   ESB-2018.1620
                   ESB-2018.1336

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3690-1
   http://www.ubuntu.com/usn/usn-3690-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

Revision History:  July  6 2018: Reverted the patch for Ubuntu 14.04 LTS.
                   June 21 2018: Initial Release

- --------------------------BEGIN INCLUDED TEXT--------------------

==========================================================================
Ubuntu Security Notice USN-3690-1
June 20, 2018

amd64-microcode update
==========================================================================

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

- - Ubuntu 18.04 LTS
- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

The system could be made to expose sensitive information.

Software Description:
- - amd64-microcode: Processor microcode firmware for AMD CPUs

Details:

Jann Horn discovered that microprocessors utilizing speculative execution
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory.

This update provides the microcode updates for AMD 17H family
processors required for the corresponding Linux kernel updates.

Update instructions:

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

Ubuntu 18.04 LTS:
  amd64-microcode                 3.20180524.1~ubuntu0.18.04.1

Ubuntu 17.10:
  amd64-microcode                 3.20180524.1~ubuntu0.17.10.1

Ubuntu 16.04 LTS:
  amd64-microcode                 3.20180524.1~ubuntu0.16.04.1

Ubuntu 14.04 LTS:
  amd64-microcode                 3.20180524.1~ubuntu0.14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3690-1
  CVE-2017-5715

Package Information:
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20180524.1~ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20180524.1~ubuntu0.17.10.1
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20180524.1~ubuntu0.16.04.1
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20180524.1~ubuntu0.14.04.1

- --------------------------------------------------------------------------------

==========================================================================
Ubuntu Security Notice USN-3690-2
July 05, 2018

amd64-microcode regression
==========================================================================

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

- - Ubuntu 14.04 LTS

Summary:

The system could be made to expose sensitive information.

Software Description:
- - amd64-microcode: Processor microcode firmware for AMD CPUs

Details:

USN-3690-1 provided updated microcode for AMD processors to address
CVE-2017-5715 (aka Spectre). Unfortunately, the update caused some
systems to fail to boot. This update reverts the update for Ubuntu
14.04 LTS.

We apologize for the inconvenience.

Original advisory details:

 Jann Horn discovered that microprocessors utilizing speculative execution
 and branch prediction may allow unauthorized memory reads via sidechannel
 attacks. This flaw is known as Spectre. A local attacker could use this to
 expose sensitive information, including kernel memory.

 This update provides the microcode updates for AMD 17H family
 processors required for the corresponding Linux kernel updates.

Update instructions:

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

Ubuntu 14.04 LTS:
  amd64-microcode                 3.20180524.1~ubuntu0.14.04.2+really20130710.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  https://usn.ubuntu.com/usn/usn-3690-2
  https://usn.ubuntu.com/usn/usn-3690-1
  https://launchpad.net/bugs/1779092

Package Information:
  https://launchpad.net/ubuntu/+source/amd64-microcode/3.20180524.1~ubuntu0.14.04.2+really20130710.1

- --------------------------END INCLUDED TEXT--------------------

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