Apple just released a second update to Java for OS X, a mere two days after the first update. Dubbed Java for OS X 2012-001 and Java for OS X 2012-002, these two updates patched the Java hole that allows the spread of Flashback botnet. Apply the patch as soon as possible using the usual Software Update on your Mac.
Flashback botnet is said to affect as much as more than 500,000 Macs at the moment. When affected by Flashback trojan, a Mac will be used to hijack search traffic with modified webpages displayed in the web browser. If you suspect your Mac is affected, please follow F-Secure’s removal instructions via Terminal.