ESB-2018.0706 - [Ubuntu] kernel: Access privileged data - Existing account 2018-03-12

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2018.0706
                    Spectre patch for Ubuntu 14.04 LTS
                               12 March 2018

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

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

Product:           kernel
Publisher:         Ubuntu
Operating System:  Ubuntu
Platform:          amd64
                   i386
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-5715  

Reference:         ESB-2018.0233
                   ASB-2018.0002.4
                   ESB-2018.0042.2

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3594-1

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

USN-3594-1: Linux kernel vulnerability

9 March 2018

linux vulnerability

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

  * Ubuntu 14.04 LTS

Summary

The system could be made to expose sensitive information.

Software Description

  * linux - Linux kernel

Details

USN-3542-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the amd64
architecture in Ubuntu 14.04 LTS. This update provides the compiler-based
retpoline kernel mitigation for the amd64 and i386 architectures. Original
advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution and
branch prediction may allow unauthorized memory reads via sidechannel attacks.
This flaw is known as Spectre. A local attacker could use this to expose
sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions

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

Ubuntu 14.04 LTS
    linux-image-3.13.0-143-generic - 3.13.0-143.192
    linux-image-3.13.0-143-generic-lpae - 3.13.0-143.192
    linux-image-3.13.0-143-lowlatency - 3.13.0-143.192
    linux-image-generic - 3.13.0.143.153
    linux-image-generic-lpae - 3.13.0.143.153
    linux-image-lowlatency - 3.13.0.143.153

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.

ATTENTION: Due to an unavoidable ABI change the kernel updates have been given
a new version number, which requires you to recompile and reinstall all third
party kernel modules you might have installed. Unless you manually uninstalled
the standard kernel metapackages (e.g. linux-generic,
linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system
upgrade will automatically perform this as well.

References

  * CVE-2017-5715
  * https://usn.ubuntu.com/3542-1/

c 2017 Canonical Ltd. Ubuntu and Canonical are registered trademarks of
Canonical Ltd.

- --------------------------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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=os5L
-----END PGP SIGNATURE-----

« Back to bulletins