An e-mail virus, or worm, dubbed as Yamanner had infected Yahoo Mail users in a very small number. The email carrying this virus has a email subject as "New Graphic Site." Once opened, the message infects the computer and then spreads to other users listed in Yahoo users email address book.

This worm exploits a vulnerability in Javascript technology used to make the mail program easier to use by triggering embedded HTML scripts to run in the computer user's browser.

The e-mail containing the virus need only be opened—in contrast to most worms that are hidden in attachments and require users to take an additional step—to release the virus, according to computer security site Symantec Corp.

Yahoo Immediately advised users to update virus and firewall software on their computers and to block any e-mail sent from the address "av3@ yahoo .com."

Symantecs suggested that Yahoo Mail users might protect themselves by upgrading to its latest test version of the recently upgraded Yahoo Mail software. The worm cannot infect users with newest version of Yahoo Mail Beta.

Yahoo email worm


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