The Microsoft Word exploit is called "LuckyCat" which allows malware to be spread via documents. The Mac OS/X Java exploit infects your computer if you should go to a web page that has the trojan. While on the page, the trojan will install itself without prompting you or giving you any indication that its being installed.
This trojan can allow a hacker to take remote control of your computer and use it maliciously or/and steal your information.
This is how the trojan behaves according to Symantec.com:
1. When the Trojan starts running, it creates the following file so that it executes whenever the victim's computer starts:
/Users/[USER NAME]/Library/ LaunchAgents/com .apple.PubSabAgent.plist
2. It creates the following file:
/Users/[USER NAME]/ Library/Preferences /com.apple.PubSabAgent.pfile
3. It connects to the following location and opens a back door on the victim's computer:
[http://]rtx556.onedumb.com
4. It may allow a remote attacker to perform the following actions on the victim's computer:
5. Download other malicious files to the victim's computer
6. Take screenshots of your computer screen
7. Upload information is has gathered to a remote computer
Mac users should ensure that an anti-virus software is installed and updated daily.
For a patch update, please see go to:
http://support.apple.com/ kb/DL1516