Friday's security updates

Fedora has updated firefox (F17:
multiple vulnerabilities), xulrunner (F17:
multiple vulnerabilities), thunderbird
(F17: multiple vulnerabilities), thunderbird-lightning (F17: multiple
vulnerabilities), and asterisk (F17: two
denial of service flaws).

Oracle has updated pidgin (OL6:
multiple vulnerabilities).

Scientific Linux has updated pidgin
(multiple vulnerabilities).

SUSE has updated libtiff (two code
execution flaws)