You need to install a newer version of glibc. Unfortunately the newer version is not included in the wheezy repository yet.

There are a couple of ways of doing this but the easiest is to temporarily add the sid repository, install the newer version of glibc (which is in the sid repository) and then remove the sid repository so that you don't accidentally update your system to sid.

Run the following as root:


And then immediately after remove the line "deb http://ftp.debian.org/debian sid main" from /etc/apt/sources.list and run apt-get update again.