USN-3531-3: intel-microcode update

USN-3531-3: intel-microcode update

intel-microcode update

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

• Ubuntu 17.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

The system could be made to expose sensitive information.

Software Description

• intel-microcode – Processor microcode for Intel 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. (CVE-2017-5715)

This update provides the corrected microcode updates required for the
corresponding Linux kernel updates.

Update instructions

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

Ubuntu 17.10

intel-microcode – 3.20180312.0~ubuntu17.10.1

Ubuntu 16.04 LTS

intel-microcode – 3.20180312.0~ubuntu16.04.1

Ubuntu 14.04 LTS

intel-microcode – 3.20180312.0~ubuntu14.04.1

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.

References

• USN-3531-1
• CVE-2017-5715

Source: USN-3531-3: intel-microcode update