-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2019.4282
                           linux security update
                             14 November 2019

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           linux kernel
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Access Privileged Data -- Existing Account
                   Denial of Service      -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-11135 CVE-2019-0154 

Reference:         ASB-2019.0322
                   ASB-2019.0321
                   ESB-2019.4273
                   ESB-2019.4269.2
                   ESB-2019.4266
                   ESB-2019.4261
                   ESB-2019.4255

Original Bulletin: 
   https://security-tracker.debian.org/tracker/DLA-1989-1

- --------------------------BEGIN INCLUDED TEXT--------------------

Package        : linux
Version        : 3.16.76-1
CVE ID         : CVE-2019-0154 CVE-2019-11135

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service, or information
leak.

CVE-2019-0154

    Intel discovered that on their 8th and 9th generation GPUs,
    reading certain registers while the GPU is in a low-power state
    can cause a system hang.  A local user permitted to use the GPU
    can use this for denial of service.

    This update mitigates the issue through changes to the i915
    driver.

    The affected chips (gen8) are listed at
    <https://en.wikipedia.org/wiki/List_of_Intel_graphics_processing_units#Gen8>;.

CVE-2019-11135

    It was discovered that on Intel CPUs supporting transactional
    memory (TSX), a transaction that is going to be aborted may
    continue to execute speculatively, reading sensitive data from
    internal buffers and leaking it through dependent operations.
    Intel calls this "TSX Asynchronous Abort" (TAA).

    For CPUs affected by the previously published Microarchitectural
    Data Sampling (MDS) issues (CVE-2018-12126, CVE-2018-12127,
    CVE-2018-12130, CVE-2019-11091), the existing mitigation also
    mitigates this issue.

    For processors that are vulnerable to TAA but not MDS, this update
    disables TSX by default.  This mitigation requires updated CPU
    microcode.  An updated intel-microcode package (only available in
    Debian non-free) will be provided via a future DLA.  The updated
    CPU microcode may also be available as part of a system firmware
    ("BIOS") update.

    Further information on the mitigation can be found at
    <https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/tsx_async_abort.html>
    or in the linux-doc-3.16 package.

    Intel's explanation of the issue can be found at
    <https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort>;.

For Debian 8 "Jessie", these problems have been fixed in version
3.16.76-1.  This update also includes other fixes from upstream stable
updates.

We recommend that you upgrade your linux packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS

- --
Ben Hutchings - Debian developer, member of kernel, installer and LTS teams

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=ScX3
-----END PGP SIGNATURE-----