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To: Yogi - Paul who wrote (1366)1/5/1999 11:43:00 PM
From: LK2  Read Replies (2) | Respond to of 2025
 
Excel program on your PC can let a hacker into your PC. How much security do you think you have, surfing the Web?

(What I also like, is when MSFT product manager John Duncan said >''There really is no newness to this,'' he said. ''There's not a bug in the software.''<
Does Microsoft mean that Excel was deliberately designed to let in hackers?)

For Personal Use Only
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
dailynews.yahoo.com

Tuesday January 5, 1999 5:22 PM ET

Experts Unveil New Hacker Technique

By MARTHA MENDOZA AP Business Writer

SAN JOSE, Calif. (AP) - A new and potentially dangerous security flaw that allows a hacker to steal
data off an unsuspecting Web surfer's computer was unveiled Tuesday by Finjan Inc., a San
Jose-based computer security company.

The security hole could affect anyone using the Internet that has Microsoft Corp. (Nasdaq:MSFT -
news)'s Excel spreadsheet on their computer, said Finjan chief executive Bill Lyons.

''We believe this could affect tens of millions of users as they're configured today,'' said Lyons. ''An
attacker could steal or copy innocent Internet users' private files without their knowledge.''

Here's how it works: A hacker sets up a Web site with the corrupt code programmed into it. Then an
unknowing computer user, who has Microsoft Excel installed but not necessarily running, visits the
site. While the user is at the site, the hacker worms into the user's Excel program and, through that, is
able to pull files off their computer.

What makes this flaw more devastating is that normally users have to take steps such as downloading
infected software to be attacked; in this case, users could be hit by simply visiting a Web site.

So far it's only theoretical. Neither Finjan nor Microsoft has heard of actual attacks. But as John
Stewart, a chief architect at Digital Island pointed out, it would be simple enough to do.

''This attack can be executed by almost anyone,'' he said.

Reporters who went to a designated Finjan World Wide Web site on Tuesday experienced the
rip-off firsthand. After clicking on Finjan's site and agreeing to be hacked, the security company was
able to pull files out of reporters' computers.

At the Redmond, Wash.-based Microsoft, John Duncan, a product manager in Microsoft's Office
group, said they already heard about and offered a solution to the problem last month, e-mailing
close to 1 million customers a security bulletin on Dec. 10 that offered a free, downloadable patch.

''We were notified by a third party and we moved to fix it immediately,'' he said. More importantly,
Duncan said they have had no customer complaints about the problem.

''There really is no newness to this,'' he said. ''There's not a bug in the software.''

Microsoft's security bulletin warned that an attacker could get in to the computer via an Excel
function, though it did not mention specifically how the attack could be made using the Internet.

''The bulletin provides customers with the information they need to decide whether or not they want
to install the ... patch,'' said Duncan. ''However, we want to avoid providing hackers with a blueprint
for how they can exploit security issues such as this.''

Avi Ruben, a researcher at AT&T Labs, said it's that widespread ease that could make the hacking
devastating.

''It is the kind of attack that makes your jaw drop when you hear about it and makes you wonder if
sensitive information should ever be kept on a networked computer,'' he said.

Finjan said Microsoft's free patch will solve the problem. Finjan was also offering a software solution
to customers. 
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