Description of problem:
Firefox 18.104.22.168 is available and fixes several security related bugs
Fixed in Firefox 22.214.171.124
MFSA 2007-08 onUnload + document.write() memory corruption
MFSA 2007-07 Embedded nulls in location.hostname confuse same-domain checks
MFSA 2007-06 Mozilla Network Security Services (NSS) SSLv2 buffer overflow
MFSA 2007-05 XSS and local file access by opening blocked popups
MFSA 2007-04 Spoofing using custom cursor and CSS3 hotspot
MFSA 2007-03 Information disclosure through cache collisions
MFSA 2007-02 Improvements to help protect against Cross-Site Scripting attacks
MFSA 2007-01 Crashes with evidence of memory corruption (rv:126.96.36.199/188.8.131.52)
Update is already out for RHEL, and marked as "critical" there.
We have people working on this. Unfortunately, this is blocking on
dependencies like devhelp no longer building on the new firefox version.