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Ubuntu Security Notice USN-3491-1

Ubuntu Security Notice USN-3491-1
Posted Nov 24, 2017
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3491-1 - 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. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, local
systems | linux, ubuntu
advisories | CVE-2014-3209, CVE-2017-1000231, CVE-2017-1000232
MD5 | 0e16712d882fe0fc0b09cee7026d8582

Ubuntu Security Notice USN-3491-1

Change Mirror Download
==========================================================================
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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