ESB-2017.2334 - [Ubuntu] libgcrypt20: Access privileged data - Console/physical 2017-09-15

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

                               ESB-2017.2334
                          Libgcrypt vulnerability
                             15 September 2017

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

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

Product:           libgcrypt20
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Console/Physical
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-0379  

Reference:         ESB-2017.2155

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3417-1

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Ubuntu Security Notice USN-3417-1
September 14, 2017

libgcrypt20 vulnerability


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

- - Ubuntu 17.04

Summary:

Libgcrypt could be made to expose sensitive information.

Software Description:
- - libgcrypt20: LGPL Crypto library

Details:

Daniel Genkin, Luke Valenta, and Yuval Yarom discovered that Libgcrypt was
susceptible to an attack via side channels. A local attacker could use 
this attack to recover Curve25519 private keys.

Update instructions:

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

Ubuntu 17.04:
  libgcrypt20                     1.7.6-1ubuntu0.2

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


References:
  https://www.ubuntu.com/usn/usn-3417-1
  CVE-2017-0379

Package Information:
  https://launchpad.net/ubuntu/+source/libgcrypt20/1.7.6-1ubuntu0.2

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