nagios3 - security update

Nagios was found to be vulnerable to two security issues that, when
combined, lead to a remote root code execution vulnerability.
Fortunately, the hardened permissions of the Debian package limit the
effect of those to information disclosure, but privilege escalation to
root is still possible locally.

• CVE-2016-9565
  Improper sanitization of RSS feed input enables unauthenticated
  remote read and write of arbitrary files which may lead to remote
  code execution if the web root is writable.
• CVE-2016-9566
  Unsafe logfile handling allows unprivileged users to escalate their
  privileges to root. In wheezy, this is possible only through the
  debug logfile which is disabled by default.

For Debian 7 Wheezy, these problems have been fixed in version
3.4.1-3+deb7u3.

We recommend that you upgrade your nagios3 packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: <https://wiki.debian.org/LTS&gt;