Bugzilla 4.2 will be EOL on 2015/11/30

[Mark Côté]

As discussed on the Bugzilla developers mailing list/newsgroup[1] and
confirmed by project leads, Bugzilla's new release policy is to
end-of-life the oldest major version four months after a new major
release. Since this is the first time we're enacting this policy, we've
extended the date to be 4 months from today rather than from Bugzilla
5.0's exact release date (July 7th).

Thus Bugzilla 4.2 will be end-of-lifed on 30 November 2015. This means
no fixes of any kind will be issued for Bugzilla 4.2 from that date
onwards. As usual, all Bugzilla admins are encouraged to upgrade[2] to
the latest version of Bugzilla as soon as possible, especially those
running 4.2 or earlier.

Mark Côté
Assistant Project Lead, Bugzilla

[1]
https://groups.google.com/forum/#!topic/mozilla.dev.apps.bugzilla/vBGTf7SvOWg
[2] https://bugzilla.readthedocs.org/en/5.0/installing/upgrading.html