Yesterday’s article explained how DNS poisoning works. And there’s already quite a bit of it happening. In Mexico there’s an ISP that offers their customers ADSL modems with the brand 2Wire.
There’s an exploit for this particular model making it easy for their DNS settings to be changed, effectively attacking the internet of users. It’s as simple as opening an email with the malicious code.
If your modem is a 2Wire then change the password and filter your emails with a good anti-virus program.