It was discovered that the glibc DNS resolver dereferenced a NULL pointer when processing a specific, but valid resource record type. Acknowledgements: Name: Florian Weimer (Red Hat Product Security)
Created glibc tracking bugs for this issue: Affects: fedora-all [bug 1251403]
Upstream bug: https://sourceware.org/bugzilla/show_bug.cgi?id=18784 Upstream patch: https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fc82b0a2dfe7dbd35671c10510a8da1043d746a5
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2018:0805 https://access.redhat.com/errata/RHSA-2018:0805