CVE request: glibc

[Florian Weimer <fweimer () redhat com>]

The getnetbyname function in glibc 2.21 in earlier will enter an 
infinite loop if the DNS backend is activated in the system Name Service 
Switch configuration, and the DNS resolver receives a positive answer 
while processing the network name.

Upstream reference:

  <https://sourceware.org/bugzilla/show_bug.cgi?id=17630>

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Florian Weimer / Red Hat Product Security