Ubuntu Security Notice USN-3253-1

3rd April, 2017

nagios3 vulnerabilities

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

• Ubuntu 16.10
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Nagios.

Software description

• nagios3
  – host/service/network monitoring and management system

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 version:

Ubuntu 16.10:

nagios3-core

3.5.1.dfsg-2.1ubuntu3.1

nagios3-cgi

3.5.1.dfsg-2.1ubuntu3.1

Ubuntu 16.04 LTS:

nagios3-core

3.5.1.dfsg-2.1ubuntu1.1

nagios3-cgi

3.5.1.dfsg-2.1ubuntu1.1

Ubuntu 14.04 LTS:

nagios3-core

3.5.1-1ubuntu1.1

nagios3-cgi

3.5.1-1ubuntu1.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2013-7108,

CVE-2013-7205,

CVE-2014-1878,

CVE-2016-9566