USN-3253-2: Nagios regression
Ubuntu Security Notice USN-3253-2
7th June, 2017
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
USN-3253-1 introduced a regression in Nagios.
- nagios3 - host/service/network monitoring and management system
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)
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.