[USN-3491-1] ldns vulnerabilities

Marc Deslauriers marc.deslauriers at canonical.com
Wed Nov 22 20:59:00 UTC 2017

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


Several security issues were fixed in ldns.

Software Description:
- ldns: ldns library for DNS programming


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.

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.

  CVE-2014-3209, CVE-2017-1000231, CVE-2017-1000232

Package Information:

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