Operating System:

[Ubuntu]

Published:

14 January 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.0131
                    USN-4236-1: Libgcrypt vulnerability
                              14 January 2020

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

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

Product:           libgcrypt20
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-13627  

Reference:         ESB-2020.0008
                   ESB-2019.3683
                   ESB-2019.3598
                   ESB-2019.3337

Original Bulletin: 
   https://usn.ubuntu.com/4236-1/

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USN-4236-1: Libgcrypt vulnerability
13 January 2020

libgcrypt20 vulnerability
A security issue affects these releases of Ubuntu and its derivatives:

  o Ubuntu 19.10
  o Ubuntu 19.04
  o Ubuntu 18.04 LTS

Summary

Libgcrypt could be made to expose sensitive information.

Software Description

  o libgcrypt20 - LGPL Crypto library

Details

It was discovered that Libgcrypt was susceptible to a ECDSA timing attack. An
attacker could possibly use this attack to recover sensitive information.

Update instructions

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

Ubuntu 19.10
    libgcrypt20 - 1.8.4-5ubuntu2.1
Ubuntu 19.04
    libgcrypt20 - 1.8.4-3ubuntu1.1
Ubuntu 18.04 LTS
    libgcrypt20 - 1.8.1-4ubuntu1.2

To update your system, please follow these instructions: https://
wiki.ubuntu.com/Security/Upgrades .

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

References

  o CVE-2019-13627

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