ESB-2017.2483 - [Ubuntu] libidn11: Denial of service - Remote with user interaction 2017-10-03

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

                               ESB-2017.2483
                           Libidn vulnerability
                              3 October 2017

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

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

Product:           libidn11
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Denial of Service -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-14062  

Reference:         ESB-2017.2467

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3434-1

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==========================================================================
Ubuntu Security Notice USN-3434-1
October 02, 2017

libidn vulnerability
==========================================================================

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

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

Summary:

Libidn could be made to crash or run programs if it processed specially
crafted input.

Software Description:
- - libidn: implementation of IETF IDN specifications

Details:

It was discovered that Libidn incorrectly handled decoding certain digits.
A remote attacker could use this issue to cause Libidn to crash, resulting
in a denial of service, or possibly execute arbitrary code.

Update instructions:

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

Ubuntu 17.04:
  libidn11                        1.33-1ubuntu0.1

Ubuntu 16.04 LTS:
  libidn11                        1.32-3ubuntu1.2

Ubuntu 14.04 LTS:
  libidn11                        1.28-1ubuntu2.2

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

References:
  https://www.ubuntu.com/usn/usn-3434-1
  CVE-2017-14062

Package Information:
  https://launchpad.net/ubuntu/+source/libidn/1.33-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libidn/1.32-3ubuntu1.2
  https://launchpad.net/ubuntu/+source/libidn/1.28-1ubuntu2.2

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