Indiana University, in conjunction with Symantec, published a technical report on Drive-By Pharming. Basically, this type of phishing involves hackers using default passwords on routers via malicious Javascript to hijack a router and change the DNS cache in the router. The effect would be to point users to fake web sites.
Here is a link to a ZDnet article about this exploit:
http://news.zdnet.com/2100-1009_22-6159938.htmlHere are links to the Indiana University report about the exploit:
http://www.cs.indiana.edu/cgi-bin/techreports/TRNNN.cgi?trnum=TR641 - the abstract (summary)
http://www.cs.indiana.edu/pub/techreports/TR641.pdf - the details
Note that the report has not yet been published. I would take this one seriously, as Linux boxes can likely be used to mess up a router via malicious sites. The bottom line is to lock down your router by changing the default password on it.
HTH,
John