• Intel Microcode regression

    From bugz_ubuntu@21:4/110 to Ubuntu Users on Wed Dec 4 09:10:01 2019
    intel-microcode regression

    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 **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

    * USN-4182-1
    * LP: 1854764

    --- Mystic BBS v1.12 A43 (Linux/64)
    * Origin: BZ&BZ BBS (21:4/110)
  • From bugz_ubuntu@21:4/110 to Ubuntu Users on Wed Dec 4 09:10:01 2019
    intel-microcode regression

    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

    USN-4182-1 introduced a regression in the Intel Microcode for some
    Skylake processors.

    Software Description

    * intel-microcode - Processor microcode for Intel CPUs

    Details

    USN-4182-1 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 **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 - 3.20191115.1ubuntu0.19.10.2

    Ubuntu 19.04
    intel-microcode - 3.20191115.1ubuntu0.19.04.2

    Ubuntu 18.04 LTS
    intel-microcode - 3.20191115.1ubuntu0.18.04.2

    Ubuntu 16.04 LTS
    intel-microcode - 3.20191115.1ubuntu0.16.04.2

    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.

    References

    * USN-4182-1
    * LP: 1854764

    --- Mystic BBS v1.12 A43 (Linux/64)
    * Origin: BZ&BZ BBS (21:4/110)
  • From bugz_ubuntu@21:4/110 to Ubuntu Users on Thu Jun 11 00:10:01 2020
    intel-microcode regression

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

    * Ubuntu 20.04 LTS
    * Ubuntu 19.10
    * Ubuntu 18.04 LTS
    * Ubuntu 16.04 LTS
    * Ubuntu 14.04 ESM

    Summary

    USN-4385-1 introduced a regression in the Intel Microcode for some
    processors.

    Software Description

    * intel-microcode - Processor microcode for Intel CPUs

    Details

    USN-4385-1 provided updated Intel Processor Microcode.
    Unfortunately, that update prevented certain processors in the
    Intel Skylake family (06_4EH) from booting successfully.
    Additonally, on Ubuntu 20.04 LTS, late loading of microcode was
    enabled, which could lead to system instability. This update
    reverts the microcode update for the Skylake processor family and
    disables the late loading option on Ubuntu 20.04 LTS.

    Please note that the `dis_ucode_ldr' kernel command line option
    can be added in the boot menu to disable microcode loading for
    system recovery.

    We apologize for the inconvenience.

    Original advisory details:

    It was discovered that memory contents previously stored in
    microarchitectural special registers after RDRAND, RDSEED, and SGX
    EGETKEY read operations on Intel client and Xeon E3 processors may
    be briefly exposed to processes on the same or different processor
    cores. A local attacker could use this to expose sensitive
    information. (CVE-2020-0543)

    It was discovered that on some Intel processors, partial data
    values previously read from a vector register on a physical core
    may be propagated into unused portions of the store buffer. A
    local attacker could possible use this to expose sensitive
    information. (CVE-2020-0548)

    It was discovered that on some Intel processors, data from the
    most recently evicted modified L1 data cache (L1D) line may be
    propagated into an unused (invalid) L1D fill buffer. A local
    attacker could possibly use this to expose sensitive information.
    (CVE-2020-0549)

    Update instructions

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

    Ubuntu 20.04 LTS
    intel-microcode - 3.20200609.0ubuntu0.20.04.2

    Ubuntu 19.10
    intel-microcode - 3.20200609.0ubuntu0.19.10.2

    Ubuntu 18.04 LTS
    intel-microcode - 3.20200609.0ubuntu0.18.04.1

    Ubuntu 16.04 LTS
    intel-microcode - 3.20200609.0ubuntu0.16.04.1

    Ubuntu 14.04 ESM
    intel-microcode - 3.20200609.0ubuntu0.14.04.1

    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-4385-1
    * LP: 1882890
    * LP: 1883002

    --- Mystic BBS v1.12 A45 (Linux/64)
    * Origin: BZ&BZ BBS (21:4/110)