ESB-2018.1795 - [Ubuntu] libgcrypt: Access privileged data - Existing account 2018-06-20

Printable version
PGP/GPG verifiable version

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

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

                               ESB-2018.1795
                          Libgcrypt vulnerability
                               20 June 2018

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

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

Product:           libgcrypt
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2018-0495  

Reference:         ESB-2018.1780
                   ESB-2018.1766

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3689-1
   http://www.ubuntu.com/usn/usn-3689-2

Comment: This bulletin contains two (2) Ubuntu security advisories.

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

==========================================================================
Ubuntu Security Notice USN-3689-1
June 19, 2018

libgcrypt11, libgcrypt20 vulnerability
==========================================================================

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

- - Ubuntu 18.04 LTS
- - Ubuntu 17.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Libgcrypt could be made to expose sensitive information.

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

Details:

Keegan Ryan discovered that Libgcrypt was susceptible to a side-channel
attack. A local attacker could possibly use this attack to recover ECDSA
private keys.

Update instructions:

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

Ubuntu 18.04 LTS:
  libgcrypt20                     1.8.1-4ubuntu1.1

Ubuntu 17.10:
  libgcrypt20                     1.7.8-2ubuntu1.1

Ubuntu 16.04 LTS:
  libgcrypt20                     1.6.5-2ubuntu0.5

Ubuntu 14.04 LTS:
  libgcrypt11                     1.5.3-2ubuntu4.6

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

References:
  https://usn.ubuntu.com/usn/usn-3689-1
  CVE-2018-0495

Package Information:
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.8.1-4ubuntu1.1
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.8-2ubuntu1.1
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.6.5-2ubuntu0.5
  https://launchpad.net/ubuntu/+source/libgcrypt11/1.5.3-2ubuntu4.6

- ----------------------------------------------------------------------------

==========================================================================
Ubuntu Security Notice USN-3689-2
June 19, 2018

libgcrypt11 vulnerability
==========================================================================

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

- - Ubuntu 12.04 ESM

Summary:

Libgcrypt could be made to expose sensitive information.

Software Description:
- - libgcrypt11: LGPL Crypto library

Details:

USN-3689-1 fixed a vulnerability in Libgcrypt. This update provides
the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

 Keegan Ryan discovered that Libgcrypt was susceptible to a side-
 channel attack. A local attacker could possibly use this attack to
 recover ECDSA private keys.

Update instructions:

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

Ubuntu 12.04 ESM:
  libgcrypt11                     1.5.0-3ubuntu0.8

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

References:
  https://usn.ubuntu.com/usn/usn-3689-2
  https://usn.ubuntu.com/usn/usn-3689-1
  CVE-2018-0495

- --------------------------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

iQIVAwUBWymjXWaOgq3Tt24GAQjd6w//XtDhPW2Mk3u7tEldlS/wMv6Ez73HB7eE
GIQtiCAvcGoU4IiVeEZOkVfYyNld1eQ01xoCkQRzIHtudlChw1BReHIKkBG3FQb9
0PwDRp3otWS42CJIj2K2UCcGx6Oul7rebKMpHYAqnqKgNvaQwIdm0SGtrP126hh4
l+bnhSVPkKiNqFod8ExIXDjwUMew+5VWZMxwqquUZzpoxCIDmSK5lLlty/yp3pFh
WkEyH69BuUFG60Kb8NNeJHuBoEctUozL4muNWuiYn4cv9XvQQadhrFye/dC+60g2
dm+FMujmPHIwk9IPxL0MRoRqa8arWY/2SYTMB2XmRJEyWq66numHVNVgz3ZfHft7
S5IC4DhFB56fCC0F1Jxdf4LXqPZtGJoDGXX3I9/SMdYj8daWOk+ShqGJLhfinXUg
BkHst7+mjlzuZbBmDTcJZtzXnODZ7+eHP/6IYgRV4SrghMRtQDd7I8OEcFByRnFY
kgzhKNDQfvt4hAgyksuxqFzK0njHTOSC2zZP0FkPpkiRtBLxkTyFsuHNiNE+LQrX
M0UuNhbYdl7mRZq4HbNpXAuwQm8G8RaHlAqwahkNd4ulZ8Kk4uGBLZCLq4VEmYlv
TQUMFPtkhezPjHoF2cBr2W9UBSrKQi+//tP4gI1DUZaFzEIuOH1VZm+XxqWiSFCs
DOSaQPUOT9k=
=niuC
-----END PGP SIGNATURE-----

« Back to bulletins