The www.redhat.com sites has an errata link in the root pages concerning recent fixes to redhat 7.0 If you follow those links, you get info somewhere as to fixes for glibc. When trying to download (click on hyperlink) concerning the relevant rpm's however. The browser will respond with a file not found error. What gives ? Where are the correct packages ? http://www.redhat.com/support/errata/RHBA-2000-079.html
There were security erratas afterwards for glibc, you should grab that one (http://www.redhat.com/support/errata/RHSA-2001-001.html).
Ok, thanks for the help. Marc