ESB-2017.1671 - [Ubuntu] libgcrypt20: Access privileged data - Existing account 2017-07-04

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2017.1671
                         Libgcrypt vulnerabilities
                                4 July 2017

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

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

Product:           libgcrypt20
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-9526 CVE-2017-7526 

Reference:         ESB-2017.1659
                   ESB-2017.1492

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3347-1

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

==========================================================================
Ubuntu Security Notice USN-3347-1
July 03, 2017

libgcrypt11, libgcrypt20 vulnerabilities
==========================================================================

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

- - Ubuntu 17.04
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Libgcrypt.

Software Description:
- - libgcrypt20: LGPL Crypto library
- - libgcrypt11: LGPL Crypto library

Details:

Daniel J. Bernstein, Joachim Breitner, Daniel Genkin, Leon Groot
Bruinderink, Nadia Heninger, Tanja Lange, Christine van Vredendaal, and
Yuval Yarom discovered that Libgcrypt was susceptible to an attack via
side channels. A local attacker could use this attack to recover RSA
private keys. (CVE-2017-7526)

It was discovered that Libgcrypt was susceptible to an attack via
side channels. A local attacker could use this attack to possibly recover
EdDSA private keys. This issue only applied to Ubuntu 16.04 LTS, Ubuntu
16.10 and Ubuntu 17.04. (CVE-2017-9526)

Update instructions:

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

Ubuntu 17.04:
  libgcrypt20                     1.7.6-1ubuntu0.1

Ubuntu 16.10:
  libgcrypt20                     1.7.2-2ubuntu1.1

Ubuntu 16.04 LTS:
  libgcrypt20                     1.6.5-2ubuntu0.3

Ubuntu 14.04 LTS:
  libgcrypt11                     1.5.3-2ubuntu4.5

In general, a standard system update will make all the necessary changes.

References:
  https://www.ubuntu.com/usn/usn-3347-1
  CVE-2017-7526, CVE-2017-9526

Package Information:
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.6-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.2-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.5-2ubuntu0.3
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.5

- --------------------------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:

        http://www.auscert.org.au/render.html?cid=1980

===========================================================================
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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=APYY
-----END PGP SIGNATURE-----

« Back to bulletins