[Users] Upgrade libc6 on containers deployed with old Ubuntu 12.04 template

[Ovidiu Calbajos]

Hello,

Today one of our customers informed us that his container was not able to
upgrade to the latest libc6 in order to avoid the GHOST vulnerability
CVE-2015-0235. Searching the internet was without any positive result. What
I found out was that libc-bin, libc6, libc6-dev and libc-dev-bin were
configured to be downloaded from a PPA(
http://ppa.launchpad.net/izx/ovz-libc/ubuntu ) and not from the Canonical's
update servers. So what was to remove the files
/etc/apt/sources.list.d/izx-ovz-libc-precise.list and
/etc/apt/preferences.d/99ovz-libc-pin and do an update/upgrade to the VPS
which resulted in updating the libc6 to the latest version available for
Ubuntu 12.04 which is 2.15-0ubuntu10.10.
Hopefully this message will help other users update the libc6 library on
their containers or customer's containers.

Best regards,
Ovidiu Calbajos
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