USN-3253-2: Nagios regression

Ubuntu Security Notice USN-3253-2

7th June, 2017

nagios3 regression

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 version:

Ubuntu 17.04:
nagios3-core 3.5.1.dfsg-2.1ubuntu5.2
nagios3-cgi 3.5.1.dfsg-2.1ubuntu5.2
Ubuntu 16.10:
nagios3-core 3.5.1.dfsg-2.1ubuntu3.3
nagios3-cgi 3.5.1.dfsg-2.1ubuntu3.3
Ubuntu 16.04 LTS:
nagios3-core 3.5.1.dfsg-2.1ubuntu1.3
nagios3-cgi 3.5.1.dfsg-2.1ubuntu1.3
Ubuntu 14.04 LTS:
nagios3-core 3.5.1-1ubuntu1.3
nagios3-cgi 3.5.1-1ubuntu1.3

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

LP: 1690380