ESB-2017.2992 - [UNIX/Linux][Ubuntu] ldns: Multiple vulnerabilities 2017-11-23

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

                               ESB-2017.2992
                           ldns vulnerabilities
                             23 November 2017

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

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

Product:           ldns
Publisher:         Ubuntu
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Ubuntu
Impact/Access:     Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                   Access Privileged Data          -- Existing Account      
                   Denial of Service               -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-1000232 CVE-2017-1000231 CVE-2014-3209

Original Bulletin: 
   http://www.ubuntu.com/usn/usn-3491-1

Comment: This advisory references vulnerabilities in products which run on 
         platforms other than Ubuntu. It is recommended that administrators 
         running ldns check for an updated version of the software for their
         operating system.

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==========================================================================
Ubuntu Security Notice USN-3491-1
November 22, 2017

ldns vulnerabilities
==========================================================================

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

- - Ubuntu 17.10
- - Ubuntu 17.04
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in ldns.

Software Description:
- - ldns: ldns library for DNS programming

Details:

Leon Weber discovered that the ldns-keygen tool incorrectly set permissions
on private keys. A local attacker could possibly use this issue to obtain
generated private keys. This issue only applied to Ubuntu 14.04 LTS.
(CVE-2014-3209)

Stephan Zeisberg discovered that ldns incorrectly handled memory when
processing data. A remote attacker could use this issue to cause ldns to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2017-1000231, CVE-2017-1000232)

Update instructions:

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

Ubuntu 17.10:
  libldns2                        1.7.0-1ubuntu1.17.10.1

Ubuntu 17.04:
  libldns2                        1.7.0-1ubuntu1.17.04.1

Ubuntu 16.04 LTS:
  libldns1                        1.6.17-8ubuntu0.1

Ubuntu 14.04 LTS:
  libldns1                        1.6.17-1ubuntu0.1

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

References:
  https://www.ubuntu.com/usn/usn-3491-1
  CVE-2014-3209, CVE-2017-1000231, CVE-2017-1000232

Package Information:
  https://launchpad.net/ubuntu/+source/ldns/1.7.0-1ubuntu1.17.10.1
  https://launchpad.net/ubuntu/+source/ldns/1.7.0-1ubuntu1.17.04.1
  https://launchpad.net/ubuntu/+source/ldns/1.6.17-8ubuntu0.1
  https://launchpad.net/ubuntu/+source/ldns/1.6.17-1ubuntu0.1

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