Apple released the Security Update 2007-005, available for Mac OS X 10.3 and 10.4 from Apple Support website or from your Software update panel:
Security Update 2007-005 is recommended for all users and improves the security of the following components:
bind
CarbonCore
CoreGraphics
crontabs
fetchmail
file
iChat
mDNSResponder
PPP
ruby
screen
texinfo
VPN
Security Update 2007-004 has been incorporated into this security update.
For additional information about this update, please visit the following website: http://docs.info.apple.com/article.html?artnum=305530.
[translation by Linathael]