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AUSCERT External Security Bulletin Redistribution
ESB-2019.4266.2
USN-4182-2: Intel Microcode update
5 December 2019
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: intel-microcode
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Privileged Data -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-11139 CVE-2019-11135
Reference: ASB-2019.0330
ASB-2019.0323
ASB-2019.0322
ESB-2019.4344
ESB-2019.4247
ESB-2019.4246
Original Bulletin:
https://usn.ubuntu.com/4182-1/
https://usn.ubuntu.com/4182-2/
https://usn.ubuntu.com/4182-3/
https://usn.ubuntu.com/4182-4/
Comment: This bulletin contains four (4) Ubuntu security advisories.
Revision History: December 5 2019: Published USN-4182-3 and USN-4182-4 with a fix reversion for a regression on some platforms
November 14 2019: Initial Release
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USN-4182-1: Intel Microcode update
12 November 2019
intel-microcode update
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 19.10
o Ubuntu 19.04
o Ubuntu 18.04 LTS
o Ubuntu 16.04 LTS
Summary
Several security issues were fixed in Intel Microcode.
Software Description
o intel-microcode - Processor microcode for Intel CPUs
Details
Stephan van Schaik, Alyssa Milburn, Sebastian A 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
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. 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
o CVE-2019-11135
o CVE-2019-11139
o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915
==============================================================================
USN-4182-2: Intel Microcode update
12 November 2019
intel-microcode update
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
Summary
Several security issues were fixed in Intel Microcode.
Software Description
o intel-microcode - Processor microcode for Intel CPUs
Details
USN-4182-2 provided updates for Intel Microcode. This update provides the
corresponding update for Ubuntu 14.04 ESM.
Stephan van Schaik, Alyssa Milburn, Sebastian A 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 - 3.20191112-0ubuntu0.14.04.2
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. 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
o USN-4182-1
o CVE-2019-11135
o CVE-2019-11139
o https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915
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USN-4182-4: Intel Microcode regression
4 December 2019
intel-microcode regression
A security issue affects these releases of Ubuntu and its derivatives:
o Ubuntu 14.04 ESM
Summary
USN-4182-2 introduced a regression in the Intel Microcode for some Skylake
processors.
Software Description
o 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 A 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
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.
References
o USN-4182-1
o LP: 1854764
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