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Ubuntu Security Notice USN-3253-2
June 07, 2017

nagios3 regression
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 17.04
– Ubuntu 16.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS

Summary:

USN-3253-1 introduced a regression in Nagios.

Software Description:
– nagios3: host/service/network monitoring and management system

Details:

USN-3253-1 fixed vulnerabilities in Nagios. The update prevented log files
from being displayed in the web interface. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

It was discovered that Nagios incorrectly handled certain long strings. A
remote authenticated attacker could use this issue to cause Nagios to
crash, resulting in a denial of service, or possibly obtain sensitive
information. (CVE-2013-7108, CVE-2013-7205)
It was discovered that Nagios incorrectly handled certain long messages to
cmd.cgi. A remote attacker could possibly use this issue to cause Nagios to
crash, resulting in a denial of service. (CVE-2014-1878)
Dawid Golunski discovered that Nagios incorrectly handled symlinks when
accessing log files. A local attacker could possibly use this issue to
elevate privileges. In the default installation of Ubuntu, this should be
prevented by the Yama link restrictions. (CVE-2016-9566)

Update instructions:

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

Ubuntu 17.04:
nagios3-cgi 3.5.1.dfsg-2.1ubuntu5.2
nagios3-core 3.5.1.dfsg-2.1ubuntu5.2

Ubuntu 16.10:
nagios3-cgi 3.5.1.dfsg-2.1ubuntu3.3
nagios3-core 3.5.1.dfsg-2.1ubuntu3.3

Ubuntu 16.04 LTS:
nagios3-cgi 3.5.1.dfsg-2.1ubuntu1.3
nagios3-core 3.5.1.dfsg-2.1ubuntu1.3

Ubuntu 14.04 LTS:
nagios3-cgi 3.5.1-1ubuntu1.3
nagios3-core 3.5.1-1ubuntu1.3

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

References:
https://www.ubuntu.com/usn/usn-3253-2
https://www.ubuntu.com/usn/usn-3253-1
https://launchpad.net/bugs/1690380

Package Information:
https://launchpad.net/ubuntu/+source/nagios3/3.5.1.dfsg-2.1ubuntu5.2
https://launchpad.net/ubuntu/+source/nagios3/3.5.1.dfsg-2.1ubuntu3.3
https://launchpad.net/ubuntu/+source/nagios3/3.5.1.dfsg-2.1ubuntu1.3
https://launchpad.net/ubuntu/+source/nagios3/3.5.1-1ubuntu1.3

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