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MS Word Zero-Day Exploit Found

subbers writes "A zero-day flaw in Microsoft Word program is being used in an active exploit by sophisticated hackers in China and Taiwan, according to warnings from anti-virus researchers. The exploit arrives as an ordinary Microsoft Word document attachment to an e-mail and drops a backdoor with rootkit features when the document is opened and the previously unknown vulnerability is triggered. From the article: 'The e-mail was written to look like an internal e-mail, including signature. It was addressed by name to the intended victim and not detected by the anti-virus software.'"

31 of 396 comments (clear)

  1. Not overly bad, combined with some others bad. by Novanix · · Score: 5, Insightful

    This type of spam isn't too bad given traditional spam methods, as smarter users won't open attachments from people they don't know. The dumb ones generally dont know a word doc from an EXE so hopefully they are also avoiding most attachments. However there have been a few articles on the future of spam and local data mining. Consider what would happen if the next virus your co-worker got looked through their emails, found the last word document they sent out, and then copied that but embedded this exploit. They might even say, its been revised please have another look. The chances you wouldn't open this are extremely low, and especially when you are opening a normally okay attachment. It is coming from someone you know, from their computer, through their isp, and even is styled the same way as normal. The question is how will we attempt to combat such things? It doesn't just have to do with holes in microsoft office, or any other format too. When local data mining is combined with exploits in any other common formats (give the image exploits of other os's even) you now have a delivery method that can almost promise execution.

    1. Re:Not overly bad, combined with some others bad. by 955301 · · Score: 2, Insightful

      Disable attachments. It's was a dumb idea in the first place - it presents opportunities for malicious behavior, harbours company secret dissemination and promotes unnecessary clutter. Refer to a url pointing at a share within the company instead.

      All internal corporate attachments should be banned. That's how you deal with it.

      --
      You are checking your backups, aren't you?
    2. Re:Not overly bad, combined with some others bad. by Anonymous Coward · · Score: 4, Insightful
      Are You Serious?!?!

      So your saying in the age of the modern broadband; in the age of rich deliverable content; you are saying we should send text only? That's great. It's got nothing to do with fundamental inherent security issues in Microsoft's software made in poor architecture judgements, as well intended as they were.

      It's the fault of a fundamental concept in email delivery, which non microsoft users use without fear.

      hmmm.... don't think so. not at all.

    3. Re:Not overly bad, combined with some others bad. by bob_herrick · · Score: 2, Insightful

      Hmmm. Probably not gonna happen. Lotus Notes anyone?

    4. Re:Not overly bad, combined with some others bad. by Anonymous Coward · · Score: 1, Insightful

      are you suggesting that I shouldnt be abe to have hampsterdance.com as my email staionary? rich content is what www is for, email is for communication.

    5. Re:Not overly bad, combined with some others bad. by 955301 · · Score: 3, Insightful

      Yes, I am serious.

      Your suggestion that an attachment represents "rich deliverable content" is laughable.

      Yes, I am saying email should be text only. It is already, whether you acknowledge it or not. You see, your "attachment" was bit shifted into text characters so it could be packaged in an email without getting munged. SMTP was intended for text and truncates bits based on that assumption. It's a bastardized, encoded cyst. A real document has a lifespan, an author, a source, and various other metadata that are not inherent to email. Copy an attachment out and paste into another email - unless the doc embeds the source, it has now been re-sourced forever.

      An email should point to the document, at its source, not contain the document. If the end user wants a copy they should make it from the single, established source.

      There is no reduction in the richness of the end effect. Single-clicking a link to the document on the source server takes no more time and is no less rich than double-clicking the document object in outlook.

      You're trying to suggest that it's a step back. Losing your system to a virus is a step back. Trading an embedded doc for a url to the document is not.

      --
      You are checking your backups, aren't you?
    6. Re:Not overly bad, combined with some others bad. by Anonymous Coward · · Score: 2, Insightful

      Of course he's serious. In this age of modern broadband, would you set up an FTP server that allowed anonymous uploads? Allow just anyone to upload anything they wanted to your computer, with no controls what-so-ever?

      I would hope not. Yet you're suggesting that we do the same thing with email. Why should we allow anyone who wants to send us anything they want? I don't want to be emailed harmful programs, yet I am anyway. Some of them are wrapped in ".SCR" or ".PIF" or, in this case, ".DOC" files, but I still receive them. It's like I have an FTP server set up to allow anyone to upload anything.

      So, yes, email should be text-only. Slashdot doesn't allow me to attach Word files. Why should email? It's the same basic medium: text messages.

      I don't allow anonymous FTP uploads to my system. If I could, I'd deny all email messages with attachments. It's the only sane solution to a world that contains unscrupulous people.

    7. Re:Not overly bad, combined with some others bad. by Anonymous Coward · · Score: 1, Insightful

      Ok, but how would that stop the virus?

      So now the virus infected file just stays on your machine, probably in the form of one/many of your already existing documents, which the virus now just makes outlook mail out links to. user gets a message from you , says, "hey yeah, I know this guy, this looks like an important update to what he sent earlier", and promptly downloads/opens the infected file from your hard drive...

      The problem still is that the user got tricked into opening an infected file, regardless of the medium.

      Anon

    8. Re:Not overly bad, combined with some others bad. by blazerw11 · · Score: 4, Insightful
      So, instead of attaching files to e-mails we should:
      • All run webservers and have e-mail programs that know how to publish to them and all of the cool new security issues that'll bring with it.
      • Or, we should all rent access on a webserver somewhere and either know how to publish documents on it, or have our e-mail program do that.
      • Or, we could all have publically accessible Windows Shares where the URL://fredsbox/myshare will somehow magically work everywhere.

      New Microsoft Outlook 2007, The Safe Way
      No more of that nasty bold text (or any other formatting for that matter) ruining your otherwise clean message.
      Enjoy getting humorous images mailed to you? Not any more!!!
      Viruses, no way, not in a text only package! (Unless the sender figures out something we didn't check, like, a buffer overflow if you make a line of text 4097 characters with no breaks.)
      E-cards are so 2006, NOW ASCII-cards!!!

      --
      A great many people think they are thinking when they are merely rearranging their prejudices. -- William James
    9. Re:Not overly bad, combined with some others bad. by diskis · · Score: 2, Insightful

      Right. Like everybody keeps their computers on at all times.
      And what's stopping the bad guy to put a malicious file on his computer, and let others download it?
      The grandparent talked about an internal share, which can be trusted to some degree, unlike for example your computer.

  2. When do we see a patch? by xot · · Score: 3, Insightful

    Is there already a race on for releasing a patch? Can the anti virus companies detect it?
    I guess it will be a mess if they dont start detecting it soon.Of course MS will be flamed again.

    --
    Lord of the Binges.
  3. is Microsoft this fragile? by yagu · · Score: 5, Insightful

    A recent slashdot story asked the question, "Is the internet that fragile?" When I see stories like this, it reminds me and should remind everyone of the other fragile technology(ies), Microsoft and their baggage.

    Consider that many on-line applications for jobs require cover letters and resumes as WORD attachments. Now, consider the temporary suggested workaround:

    As a temporary mitigation method, Symantec is recommending that Microsoft Word document e-mail attachments be blocked at the network perimeter. "Furthermore, extreme caution should be exercised while processing Microsoft Word attachments received as an unexpected e-mail Attachment," company officials said.

    This is disruptive and lose-lose, either organizations heed the advice, and now for as long as it takes to fix Microsoft's problem applicants will have their documents blocked, or some of these hackers profuse their new hack and compromise organization's infrastructure.

    Microsoft has made our bed, and now we all must sleep in it (ick). It's unacceptable that such an exploit could so easily take control and wreak damage. Why can a simple e-mail get in and twiddle with what should be administration-priveleged system resources? I know the recommendation is everyone accessing their XP as non-administration users, but how do you enforce that, especially when for so long so many of the out-of-the-box configurations make administration rights the default login?

    I must say I admire Microsoft's savvy more each day in their EULA -- crafted to absolve Microsoft of any responsibility for bad things happening to users because of Microsoft's software. It must be reassuring to offer a product and not have to assume responsibility. What a unique privelege

    Of course, a good outcome from this would be to reconsider the global transport of exchanging documentation (e.g., resumes and cover letters, etc.) to something a little less Micrsoft, a little more open, and a little less prone to exploits. That can't happen soon enough.

    1. Re:is Microsoft this fragile? by Politburo · · Score: 3, Insightful

      I must say I admire Microsoft's savvy more each day in their EULA -- crafted to absolve Microsoft of any responsibility for bad things happening to users because of Microsoft's software. It must be reassuring to offer a product and not have to assume responsibility. What a unique privelege

      You act like MS is the only company that does this. Nothing could be further from the truth.

    2. Re:is Microsoft this fragile? by d_jedi · · Score: 3, Insightful

      I must say I admire Microsoft's savvy more each day in their EULA -- crafted to absolve Microsoft of any responsibility for bad things happening to users because of Microsoft's software. It must be reassuring to offer a product and not have to assume responsibility. What a unique privelege
      "Unique privelege (sic)"? Not quite.. just about every software company absolves itself of legal responsibility in this way.. why, even the GPL does it.

      --
      I am the maverick of Slashdot
    3. Re:is Microsoft this fragile? by gmiley · · Score: 3, Insightful
      Consider that many on-line applications for jobs require cover letters and resumes as WORD attachments. Now, consider the temporary suggested workaround:
      As a temporary mitigation method, Symantec is recommending that Microsoft Word document e-mail attachments be blocked at the network perimeter. "Furthermore, extreme caution should be exercised while processing Microsoft Word attachments received as an unexpected e-mail Attachment," company officials said.
      This is disruptive and lose-lose, either organizations heed the advice, and now for as long as it takes to fix Microsoft's problem applicants will have their documents blocked, or some of these hackers profuse their new hack and compromise organization's infrastructure.

      This suggested work-around should never have been... well, suggested. Unfortunately, until this has been fixed it leaves a network wide open to potential problems. One must weigh the losses and choose the lesser. Infected network potental compromise/loss of data/work/money, or block files for the time being, perhaps quarantine them until proper detection methods are ready and possible loss of a few hours for a few people.

      That all depends on the organization as to what would be more acceptable.

      Continuing on, I see this all the time, people immediately bash MS. Granted, it is their software, however, it could be (and occasionally is) software created by other companies. It just so happens that MS is a popular choice for the majority of the world.
      I know the recommendation is everyone accessing their XP as non-administration users, but how do you enforce that

      Any properly admin'ed network can easily do this. At home is a different story, but those that refuse to work with only the minimum required permissions take the risk of exposing themselves to a larger selection of potentially harmfull attacks.
      I must say I admire Microsoft's savvy more each day in their EULA -- crafted to absolve Microsoft of any responsibility for bad things happening to users because of Microsoft's software. It must be reassuring to offer a product and not have to assume responsibility. What a unique privelege

      I doubt you would happily take responsability if you let your neighbor borrow your lawnmower who then promptly used it to run over his own dog...
  4. Not funny by Beuno · · Score: 2, Insightful

    How many EXTREMLY critical flaws is it already Word documents have?
    How is it possible these things still keep coming up.
    It's not even funny anymore...

    1. Re:Not funny by BFaucet · · Score: 3, Insightful

      What really gets me is how rarely the methods these vulnerabilities use are used for useful purposes.

      In most cases rich text or even plain text documents are more than adequate. Do memos and resumes really need to have executing code in them?

      --
      -Derick
  5. Just how much is 'exploited'? by Dimensio · · Score: 2, Insightful

    Is this an exploit that somehow grants malicious code access privledges even beyond the user's access level, or does this simply allow execution of arbitrary code at the access level of the user who is running Word?

    If it is the former, then it's a very serious flaw. If it's the latter, then it's a serious flaw, but one that will only really adversely affect people stupid enough to run as Administrator all the time, despite Microsoft's own warning against such idiotic practices.

    If it is the latter, then I have further justification to use against the users who have complained about using their Administrator privledges.

    1. Re:Just how much is 'exploited'? by WhiteWolf666 · · Score: 2, Insightful

      I <3 MS Trolls.

      Did you miss the part of the article where it says, "The e-mail was written to look like an internal e-mail, including signature".

      Get an e-mail from your boss. Doc format. Or get an e-mail from your clients. Doc format.

      Do you open it, or not?

      Do you feel lucky?

      --
      WhiteWolf666 an exBush supporter. All you new-school,compassionate,save the children Republicans can rot in hell
    2. Re:Just how much is 'exploited'? by kimvette · · Score: 2, Insightful

      Gee, Why do most users run Windows as admin every day? Stupid programming by third-party vendors (or sometimes even on Microsoft's part), and runas is too much of a pain for the average user (and re-introduces the exploit ANYHOW). If, say, Quickbooks calls Outlook through MAPI and Outlook is configured to use Word as its editor (the default configuration IIRC) and the template just happens to have the infection in place in normal.dot, guess what? Even though the user is set up as a limited user, the user just got rooted.

      Is Microsoft to blame for the whole situation? Yes and no. They have guidelines for application design that the likes of Intuit (and many others) ignores, but on the other hand Microsoft had the technical ability to enforce the admin vs. non-admin issue with Windows 2000 and XP, and in the name of backwards compatibility did not do so. That doesn't excuse Intuit and others from poor programming practices, but the blame should be shared by companies in addition to Microsoft.

      As far as word document infections go: WHY is a WORD document allowed to use VB to silently install components on the system? Run as admin or non-admin, this kind of behavior by an application is totally inexcusable. Applications should have write access to $HOME and $TEMP and that's it, and writing to other locations should require confirmation. One would argue that it shouldn't be the case because in Unix root is "god" and can nuke the entire filesystem if root so desires, but it's different because Unix didn't gain popularity until very long after security was tightly integrated into the system. On Unix is safe for the system or application to assume that if root said to rm -rf /, root MEANT to rm -rf /, and do it NOW. Where Windows came from NO security to a theoretically superior security model (it is in theory superior, if it were implemented as originally designed) but due to backwards compatibility deploying it as designed is unacceptable, then Windows should require confirmation any time things outside of $HOME and $TEMP are modified.

      One might argue that asking confirmation would be annoying, that may be true. In that case, you could have a [ ]Don't ask me again this session or [ ] don't ask me again (for five minutes) option, to make it more similar to "sudo" (e.g, depending on the system, if I sudo on a box, and run multiple commands within a short time, I only need to authenticate once, but wait a few minutes then I need to reauthenticate).

      There are workable ways for Microsoft to fix the security issue AND maintain at least some level of backwards compatibility. Obviously the ideal solution would be to sandbox applications into virtual machines. but that could break interprocess communication mechanisms.

      --
      The Christian Right is Neither (Christian nor right). See: Matthew 23, Matthew 25, Ezekiel 16:48-50
  6. a better workaround by frankie · · Score: 3, Insightful

    The exploit only works properly in Office 2003 (and crashes Office 2000). Given that emailed DOC files are pretty much required for millions of people to do their jobs, the most effective short-term workaround is use something else to read DOC files.

  7. Clarification: Attack is from China, not of China by WillAffleckUW · · Score: 5, Insightful

    For all we know, the Zombie Overlords live in Scranton, NJ or Brazil.

    They're just using the incredibly insecure servers one can find in China and nearby countries to base the attacks from.

    Now, that doesn't mean they aren't Chinese - in fact, that's quite possible - just that where an attack comes from is frequently not where the people who set it off are based in.

    --
    -- Tigger warning: This post may contain tiggers! --
  8. Good lord by Darkman,+Walkin+Dude · · Score: 3, Insightful

    Refer to a url pointing at a share within the company instead.

    Have you never heard of phishing?

    1. Re:Good lord by 955301 · · Score: 2, Insightful


      At least with phishers they have to burn an IP address of a node on their zombie cluster to present the mock web page.

      --
      You are checking your backups, aren't you?
  9. Re:Geez. by LurkerXXX · · Score: 5, Insightful
    if you don't know the sender, DON'T OPEN THE FILE

    WRONG! Modern viruses, for YEARS now, have set their 'sent from' address as a random address they found in either the internet cache, or ADDRESS BOOK of the infected machine. Often many people in a random address book already know each other. That means the virus has a very good chance to be sent 'from' someone you know (in the address line), although that person didn't send it.

    Don't trust an attachment just because it appears to come from someone you trust. If you aren't expecting that exact attachment, or there isn't very very clear working in the email that would make it relevant to something you know about rather than some generic topic, don't open it. Take two seconds and email the person back and ask what it is.

    Trusting an attachment just because it appears to come from someone you know is STUPID.

  10. Re:Patch available by dj42 · · Score: 2, Insightful

    Patch available: http://www.openoffice.org/


    Why did that get modded insightful?

    If anything, it's barely "informative".

    In the corporate world, using Open Office is like driving an electric scooter. Sure, some people think it's cool because it's not a gas-sucking-Hummer, but it's a piece of shit scooter.

    Is there perfect compatibility between business users with Word. and OO? Absolutely not. It's totally unacceptable for corporate use with other folks that use MS Word regularly. Same with Excel and the OO varient. Especially if you're dealing with anyone "higher up" or you consult for folks, or you just want to know your files will be opened successfully, without requiring any extra effort from the person you sent it to.

    Reccomending OO because MS Word has a critical flaw makes sense for SOME home users, people who don't share files with MS Word users, etc. But for the most part, it's a bad reccomendation unless you're just using OO like a slightly more advanced Notepad. As soon as you tap into truly in depth MS-Word features, compatibility problems arise. In my experience, all open/free/generic word processors are going to have to be used as glorified Notepads if you hope to attain high quality cross-product/platform compability.

    --
    We are one consciousness experiencing itself subjectively. Back to you with the weather, Bob!
  11. Yes. I think that pretty much exactly... by msauve · · Score: 2, Insightful
    what he's saying. email is a text medium, like it or not.

    It a medium of communications, and text is the only content which can be assumed to be usable by any recipient. Sending anything other than plain old text, unless there is prior agreement between both sender and receiver, is a hinderance to communications.

    http://www.efn.no/html-bad.html

    --
    "National Security is the chief cause of national insecurity." - Celine's First Law
  12. My PC Compatriots Won't Listen... by BoRegardless · · Score: 2, Insightful

    ...when I tell them, that my Mac OSX laptop is the CHEAPEST form of absolute insurance against the MS EULA protected gross safety problems of MS's XP Pro & MS Office.

    They do critical MSWord docs back and for with clients and the FDA in Wash. D.C. all day long, and I really don't think they accept how risky this is today, particularly if a document comes in forwarded from a reliable source that has had the malicious RootKit somehow patched onto an other wise legitimate document that they need to file with the FDA.

    Of course that makes me wonder how the FDA handles a malicious MS Word document. They are no different than anyone else in receiving zero day exploits.

    Each time a zero day or other serious problem hits, I remind them, but they are literally afraid of having to learn something new, & so stick with the MS offerings.

    1. Re:My PC Compatriots Won't Listen... by necro2607 · · Score: 3, Insightful

      Even worse, Word .Docs contain huge amounts of "history" in them.

      I have, many times, opened project scope documents (obviously having been based off of older docs) and seen the private/confidential project details of past clients (to the extent of specific dollar amounts etc.)... All because Word, behind the scenes, tracks your changes as some kind of "convenience"...

      I'm sure you can turn off that option, but just consider the technical knowledge of the average marketing/sales person in the office...

      In a small business without some strict & exact security policies, it's obviously very easy for default settings like these to exist completely unnoticed for years (no one noticed until I was like WTF when I joined the company)...

  13. There is no reason..... by Stanislav_J · · Score: 2, Insightful
    .....to ever, ever, EVER open any attachment that came via e-mail unless you are (a) expecting it, (b) know what it is, and (c) know who it came from.

    Since all these factors can be spoofed, insist that anyone who is sending you an attachment first send you a plain text e-mail advising you that he/she is about to send the attachment. This message should include your name in the body in the text, a brief description of what is being sent, and maybe even a worded statement of the date and time to confirm the time stamp. You could even establish a code word or phrase with regular correspondents and ask that they include that in both subject line and text body. Conversely, if you do receive an unexpected attachment, but it appears to be from a known correspondent, e-mail them and ask if they sent you a message with attachment with subject line XXX at such and such a date and time.

    Seem like a lot of trouble to go through? Compare the momentary annoyance to the time and cost of ridding your machine of a nasty virus. I've known people who are well aware of the ticks and trades of virus sending assholes who get infected simply because they get careless or lazy and don't take steps such as the above.

    --
    "Every great cause begins as a movement, becomes a business, and eventually degenerates into a racket." -- Eric Hoffer
  14. Twice? by goofyspouse · · Score: 2, Insightful
    way too many people will open this without thinking twice
    I'd be happy if more people thought ONCE before opening attachments.