Updates to Counter-Strike: Source have been released. The updates will be applied automatically when your Steam client is restarted. The specific changes include:

Engine
Fixed an exploit that allowed files to be uploaded to the server at arbitrary locations in the file system
Fixed a server crash caused by a client packet claiming to be an HLTV client when HLTV is disabled on the server
Fixed a server crash caused by spoofing a client disconnect message
Fixed a server crash caused by sending malformed reliable subchannel data

Counter-Strike: Source
Novint Falcon support is now enabled by default
Get the full article at store.steampowered.com