Executive Summary

Summary
Title Intel Microcode update
Informations
Name USN-4182-1 First vendor Publication 2019-11-12
Vendor Ubuntu Last vendor Modification 2019-11-12
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 19.10 - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Intel Microcode.

Software Description: - intel-microcode: Processor microcode for Intel CPUs

Details:

Stephan van Schaik, Alyssa Milburn, Sebastian Ă–sterlund, Pietro Frigo, Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel processors using Transactional Synchronization Extensions (TSX) could expose memory contents previously stored in microarchitectural buffers to a malicious process that is executing on the same CPU core. A local attacker could use this to expose sensitive information. (CVE-2019-11135)

It was discovered that certain Intel Xeon processors did not properly restrict access to a voltage modulation interface. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2019-11139)

Update instructions:

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

Ubuntu 19.10:
intel-microcode 3.20191112-0ubuntu0.19.10.2

Ubuntu 19.04:
intel-microcode 3.20191112-0ubuntu0.19.04.2

Ubuntu 18.04 LTS:
intel-microcode 3.20191112-0ubuntu0.18.04.2

Ubuntu 16.04 LTS:
intel-microcode 3.20191112-0ubuntu0.16.04.2

After a standard system update you need to reboot your computer. Please note that in order to fully mitigate CVE-2019-11139, a warm reboot is required *after* applying the microcode update; so in effect a second reboot.

References:
https://usn.ubuntu.com/4182-1
CVE-2019-11135, CVE-2019-11139,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20191112-0ubuntu0.19.10.2
https://launchpad.net/ubuntu/+source/intel-microcode/3.20191112-0ubuntu0.19.04.2
https://launchpad.net/ubuntu/+source/intel-microcode/3.20191112-0ubuntu0.18.04.2
https://launchpad.net/ubuntu/+source/intel-microcode/3.20191112-0ubuntu0.16.04.2

Original Source

Url : http://www.ubuntu.com/usn/USN-4182-1

Alert History

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0
Date Informations
2019-11-13 00:19:12
  • First insertion