Browsers beware: new holes in IE and Flash

Daily Newsletters

Sign up to ZDNet UK's daily newsletter.

Threat levels SSL - critical The SSL problem is a lethal vulnerability that essentially means any SSL transaction ever made through IE 5 or later may have been compromised. Flash Buffer Overflow - serious The Flash overflow vulnerability (MPSB02-09) is especially dangerous because it is not browser- or operating system-dependent and therefore affects any user whether they are using Internet Explorer, Netscape Navigator, Windows, Linux, or Unix. Also, firewalls are normally configured to allow Web browser use, including the ability to pass Flash files, so there is no protection provided by following good security practices. In fact, this attack doesn't even require the use of a browser, just an application that will play an SWF file, which can include instant messaging and e-mail. Flash URL Modification (XML) - serious The other new Flash vulnerability (MPSB02-10) exists in the XML implementation in Flash Player and can trick a browser to disclose files on the local hard drive. Mitigating factors
Microsoft indicates that it would be difficult to exploit the SSL vulnerability, but others in the security community are vigorously disputing this claim and point out that many readily available hacker tools could be used to manipulate browsers so they would expose data through this flaw. Macromedia doesn't list mitigating factors for any of its vulnerabilities. Fix
To fix the SSL problem, do not use IE for SSL transactions until it's secured with a patch. Microsoft hasn't indicated that the company feels this is a serious flaw, and there has been no report that they are working on a patch. Flash Macromedia urges users to download and install the latest version of the Flash Player (currently version 6.0.40.0) to block the serious malformed header attack vulnerability (MPSB-02-09). The XML vulnerability (MPSB-02-10) is also fixed in the newest versions of Flash Player, as is the persistent connection problem. This can get a bit confusing, so the best policy is simply to download the latest version of Flash Player rather than looking for a specific version as mentioned in different vulnerability listings. Final word
What's the absolute worst thing you can think of that you could discover about Internet Explorer? Would a vulnerability that would let sites easily hijack credit card information be pretty high on the list? How about if Microsoft knew about the vulnerability for five years or more and did nothing? The biggest stumbling block to getting people to make purchases on the Internet has always been a fear that thieves could get hold of their credit card information (even though the risk exists when presenting a credit card in a shop or restaurant, or giving the credit card information over the phone to a mail order company). We have all come to rely on SSL technology and to trust that the little padlock symbol on our browser was assurance that our information was protected. Indeed, most reported credit card data disclosures have come from people hacking servers, not hijacking information en route. But it turns out that this may be due more to luck than to good security. Microsoft is making little of the SSL vulnerability, saying that a hacker would have to go to the extraordinary effort of creating a Web page and then redirecting surfers to the site. This ignores the fact that such a ploy is easy to do and, in fact, happens all the time. The fact that Microsoft apparently knew about the ability to hijack SSL data for five years and did nothing about it is unacceptable. As for the Flash problems, the information that Flash 6 keeps links active after leaving a site certainly clears up some problems I have been experiencing with bandwidth hogging. Sometimes, I see a lot of continued data traffic even when all the browser windows I have open are static. Apparently, I've been seeing Flash traffic from sites I've left that have remained active in the background. For a corporate network, this could add up to a lot of unneeded bandwidth utilization.
Have your say instantly in the Tech Update forum. Find out what's where in the new Tech Update with our Guided Tour. Let the editors know what you think in the Mailroom.

Post your comment

In order to post a comment you need to be registered and logged in.

You can also log in with Facebook. Log in or create your ZDNet UK account below

  • Login

Will not be displayed with your comment

By signing up for this service, you indicate that you agree to our Terms and Conditions and have read and understood our Privacy Policy. Questions about membership? Find the answers in the Community FAQ

Get ZDNet UK's daily newsletter

Enter your email address to sign up

ZDNet UK Live

Freebies202

Duplicate comments are not made intentionally. Its very good to know that now you are keeping check on this problem because sometimes a commenter...

5 hours ago by Freebies202 on Microsoft fixes blog comments, speeds up blogs with open source
kevinmchapman

"the very significant number of users" and "many (most) of us" - you have no evidence for these statements. It is a fact that most users are saying...

13 hours ago by kevinmchapman on A tale of two distros: Ubuntu and Linux Mint
Marg Menzies Harrison

Another grammar faux pas is the improper use of "you". When sitting down down in a restaurant, for example, I get cringe when the waitress...

14 hours ago by Marg Menzies Harrison via Facebook on 10 flagrant grammar mistakes that make you look stupid
zdnetukuser

And NOW, folks, for Canonical's next trick... Kubuntu is late. Here's a pencil. Draw your own conclusions. cf.:...

15 hours ago by zdnetukuser on Linux Minterface
Moley

@kevinmchapman. The discussion here reflects the very significant number of users who really do like the traditional menu system and who wish to...

17 hours ago by Moley on A tale of two distros: Ubuntu and Linux Mint
kevinmchapman

Er, no... It is an efficient means of finding the application/file/setting you need in one place. The icons are a simply a fallback for when you...

18 hours ago by kevinmchapman on A tale of two distros: Ubuntu and Linux Mint
TerryRK

Isn't the provision of a text based search an admission by the developers that the mass of icons approach does not work? I don't need to use a...

20 hours ago by TerryRK on A tale of two distros: Ubuntu and Linux Mint
kevinmchapman

"Unity and GNOME 3 both abandon the old text-based cascading menus in favour of a graphical icon-driven system." Point truly missed. Both use a...

20 hours ago by kevinmchapman on A tale of two distros: Ubuntu and Linux Mint
TerryRK

whs001 - Thank you, I'm glad you liked the article. I absolutely agree with you on your first point. I should perhaps have made it clearer that...

20 hours ago by TerryRK on A tale of two distros: Ubuntu and Linux Mint
Dennis Nilsson

If we allow corporate interest to dictate the way our government circumvents due process against foreign entities then we should accept the same...

21 hours ago by Dennis Nilsson via Facebook on ACTA stumbles in Germany
GHar123

I totally dislike pirating of works, I fear that artists will be deterred from creating works if they think that they are going to get ripped off....

23 hours ago by GHar123 on ACTA stumbles in Germany
JCB33

How dare film makers, artists or anybody that invests in creativity stop us pirating their works for free. I want to be able to walk into my local...

1 day ago by JCB33 on ACTA stumbles in Germany
Moley

@GrueMaster. I prefer horses for courses rather than one size fits all. I, and I suspect most other computer users, do not really wish to have...

1 day ago by Moley on A tale of two distros: Ubuntu and Linux Mint
greycynic

The product that scares me every time I have to use it is the Office 2007 version of Excel. The first bug that I found was applying the median...

1 day ago by greycynic on Ten flawed products that derail productivity
GrueMaster

Nice review and very informative. One thing I'd like to add (in reply to whs001's 1st question), the main reason to have the same interface from...

1 day ago by GrueMaster on A tale of two distros: Ubuntu and Linux Mint
Frederick Wrigley

I'be been using Mint 12 since the RC came out, and I am far more happy with the Cinnamon, the Mate, and, yes (with extensions), theGnome 3...

1 day ago by Frederick Wrigley via Facebook on A tale of two distros: Ubuntu and Linux Mint
bdantas

Excellent article. One small correction, though--although a fresh installation of Linux Mint 12 will, indeed, provide the user with a version of...

1 day ago by bdantas on A tale of two distros: Ubuntu and Linux Mint
Alan Ralph

In related news, the ISPs club together to get the members of the Home Affairs Select Committee (ya goofed on that part, ZDNet UK) copies of "The...

1 day ago by Alan Ralph via Facebook on MPs urge ISPs to take down terrorist material
Alan Ralph

In related news, the ISPs club together to get the members of the Home Affairs Select Committee (ya goofed on that part, ZDNet UK) copies of "The...

1 day ago by Alan Ralph via Facebook on MPs urge ISPs to take down terrorist material
Moley

For Gnome 2 die-hards, it is possible to add icons to the bottom panel (or top top panel, if you prefer) which provide the exact Gnome 2...

1 day ago by Moley on A tale of two distros: Ubuntu and Linux Mint

Latest in Application Development