This is a would-like-to-expand collection of command line tools which interact with the Red Hat Network API.
Red Hat constantly alerts its paying customers via email of the errata when published on rhn.redhat.com . Assuming you’ve got such a notification, if you want to investigate further and find out which systems are affected by the advisory you can use this python tool:
$ python extract_affected_systems.py -a "RHSA-2012:0350" -u [email protected] -p $YOURPASS Systems list... one.example.com four.example.com ...
you can also list the packages affected by the advisory (which need to be updated):
$ python extract_affected_systems.py -a "RHSA-2012:0350" -u [email protected] -p $YOURPASS -P Systems list... one.example.com four.example.com ... Packages list... kernel-2.6.32 kernel-debug-2.6.32 ...
Enjoy.