Executive Summary

Summary
Title Intel Microcode regression
Informations
NameUSN-4182-4First vendor Publication2019-12-04
VendorUbuntuLast vendor Modification2019-12-04
Severity (Vendor) N/ARevisionN/A

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base ScoreN/AAttack RangeN/A
Cvss Impact ScoreN/AAttack ComplexityN/A
Cvss Expoit ScoreN/AAuthenticationN/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

- Ubuntu 14.04 ESM

Summary:

USN-4182-2 introduced a regression in the Intel Microcode for some Skylake processors.

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

Details:

USN-4182-2 provided updated Intel Processor Microcode. A regression was discovered that caused some Skylake processors to hang after a warm reboot. This update reverts the microcode for that specific processor family.

We apologize for the inconvenience.

Original advisory 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 14.04 ESM:
intel-microcode 3.20191115.1ubuntu0.14.04.2

After a standard system update you need to reboot your computer.

References:
https://usn.ubuntu.com/4182-4
https://usn.ubuntu.com/4182-1
https://launchpad.net/bugs/1854764

Original Source

Url : http://www.ubuntu.com/usn/USN-4182-4

Alert History

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0
DateInformations
2019-12-04 09:19:46
  • First insertion