Re: Death of antivirus software imminent
Alex Alten wrote: Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. For example, using a Verisign ICA certificate to do MITM of SSL, or possibly requiring Ebay to provide some sort of legal access to Skype private keys. And all the criminals will of course obey the law. Why not just require them to set an evil flag on all their packets? If there is a 2nd layer of encryption then this would require initial key exchanges that may be vulnerable to interception or after-the-fact analysis of the decrypted SSL payloads. I guarantee I can make any payload look like any other payload. If the only permitted communications are prayers to Allah, I can encode key exchange in prayers to Allah. - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Fri, 2008-01-18 at 02:31 -0800, Alex Alten wrote: At 07:35 PM 1/18/2008 +1000, James A. Donald wrote: And all the criminals will of course obey the law. Why not just require them to set an evil flag on all their packets? These are trite responses. Of course not. My point is that if the criminals are lazy enough to use a standard security protocol then they can't expect us not to put something in place to decrypt that traffic at will if necessary. I see your point, but I can't help feeling that it's a lot like requiring all houses to be designed and built with a backdoor that the police have a key to, in order to guarantee that the police can come in to investigate crimes. The problem is that the existence of that extra door, and the inability of people to control their own keys to lock it, makes crimes drastically easier to commit. You think police don't use DMV records to harass ex-girlfriends or make life hard for people they don't like? You think Private investigators and other randoms who somehow finesse access to that data all have the best interests of the public at heart? You think the contractor who builds the house will somehow forget where the door is, or will turn over *all* copies of the keys? And stepping away from quasi-legit access used for illegitimate purposes, you think there're no locksmiths whose services the outright criminals can't buy? You think the existence of a backdoor won't inspire criminal efforts to get the key (by reading a binary dump if need be) and go through it? I guarantee I can make any payload look like any other payload. If the only permitted communications are prayers to Allah, I can encode key exchange in prayers to Allah. Look, the criminals have to design their security system with severe disadvantages; they don't own the machines they attack/take over so they can't control its software/hardware contents easily, they can't screw around too much with the IP protocol headers or they lose communications with them, and they don't have physical access to the slave/owned machines. That is a very petty class of criminal. While the aggregate thefts (of computer power, bandwidth, etc) are impressive, they're stealing nothing that isn't a cheap commodity anyway and the threat to lives and real property that would justify the kind of backdoors we're talking about just isn't there. Being subject to botnets and their ilk is more like the additional cost of doing business in bad weather, than it is like being the victim of a planned and premeditated crime with a particular high-value target. Moreover, we know how to weatherproof our systems. Seriously. We know where the vulnerabilities are and we know how to create systems that don't have them. And we don't need to install backdoors or allocate law enforcement budget to do it. More than half the servers on the Internet - the very most desirable machines for botnet operators, because they have huge storage and huge bandwidth - run some form of Unix, and yet, since 1981 and the Morris Worm, you've never heard of a botnet composed of Unix machines! Think about that! They do business in the same bad weather as everyone else, but it costs them very little, because they have ROOFS! I submit that the sole reason Botnet operation even exists is because so many people are continuing to use an operating system and software whose security is known to be inferior. A(nother) backdoor in that system won't help. The criminals whose activities do justify the sort of backdoors you're talking about - the bombers, the kidnappers, the extortionists, even the kiddie porn producers and that ilk - won't be much affected by them, because they *do* take the effort to get hard crypto working in addition to standard protocols, they *do* own their own machines and get to pick and choose what software goes on them, and if they're technically bent they can roll their own protocols. Bear - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Alex Alten wrote: Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. For example, using a Verisign ICA certificate to do MITM of SSL, or possibly requiring Ebay to provide some sort of legal access to Skype private keys. I can certainly imagine various countries legislating such backdoors, and other countries quietly installing them (assuming they aren't already there for Skype). And that will certainly help in catching some fraction of unsophisticated crooks. But botnets-for-rent are currently making pretty substantial amounts of money (eg for sending spam, or ddos attacks, or as phishing hosts), and are increasingly using professionally written malware. (http://www.cs.auckland.ac.nz/~pgut001/pubs/malware_biz.pdf) Given the lure of this much easy money, I think it's much more likely that the cleverer bad guys will just wrap an un-backdoored ssh or ssl or ipsec or other good crypto protocol that's already widely available layer inside the backdoored one(s), giving them (continued) full security. For better or worse, I think the bad buys can use strong crypto horse left the barn a long time ago. In a more recent message, Alex Alten wrote: the criminals have to design their security system with severe disadvantages; they don't own the machines they attack/take over so they can't control its software/hardware contents easily I don't see your point -- surely once a machine is recruited into a botnet, the botnet herder can and does load any software s/he wants onto the new recruit. they can't screw around too much with the IP protocol headers or they lose communications with them, and they don't have physical access to the slave/owned machines. In what way has this stopped (or even slowed) the Storm worm, to name one notorious example? -- -- Jonathan Thornburg (remove -animal to reply) [EMAIL PROTECTED] School of Mathematics, U of Southampton, England Washing one's hands of the conflict between the powerful and the powerless means to side with the powerful, not to be neutral. -- quote by Freire / poster by Oxfam - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
At 07:35 PM 1/18/2008 +1000, James A. Donald wrote: Alex Alten wrote: Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. For example, using a Verisign ICA certificate to do MITM of SSL, or possibly requiring Ebay to provide some sort of legal access to Skype private keys. And all the criminals will of course obey the law. Why not just require them to set an evil flag on all their packets? These are trite responses. Of course not. My point is that if the criminals are lazy enough to use a standard security protocol then they can't expect us not to put something in place to decrypt that traffic at will if necessary. If there is a 2nd layer of encryption then this would require initial key exchanges that may be vulnerable to interception or after-the-fact analysis of the decrypted SSL payloads. I guarantee I can make any payload look like any other payload. If the only permitted communications are prayers to Allah, I can encode key exchange in prayers to Allah. Yeah and you can only communicate with Allah with that type of design. Look, the criminals have to design their security system with severe disadvantages; they don't own the machines they attack/take over so they can't control its software/hardware contents easily, they can't screw around too much with the IP protocol headers or they lose communications with them, and they don't have physical access to the slave/owned machines. And, last I heard, they must obey Kerckhoff's law, despite using prayers to Allah for key exchanges. Given all this, I'm not saying its easy to do, but it should be quite possible to crack open some or all of their encrypted comms and/or trace back to the original source attack machines. - Alex -- Alex Alten [EMAIL PROTECTED] - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Alex Alten wrote: [snip] These are trite responses. Of course not. My point is that if the criminals are lazy enough to use a standard security protocol then they can't expect us not to put something in place to decrypt that traffic at will if necessary. [snip] Look, the criminals have to design their security system with severe disadvantages; they don't own the machines they attack/take over so they can't control its software/hardware contents easily, they can't screw around too much with the IP protocol headers or they lose communications with them, and they don't have physical access to the slave/owned machines. And, last I heard, they must obey Kerckhoff's law, despite using prayers to Allah for key exchanges. Given all this, I'm not saying its easy to do, but it should be quite possible to crack open some or all of their encrypted comms and/or trace back to the original source attack machines. However, we do know that criminals are not always lazy. The trite comment often said is that if they used the same level of effort in a legal enterprise they would have done quite well. The other proof that they are not lazy is looking at the evolution of the sophistication of malware like Storm and Nugache. It takes some serious effort to overcome the real handicaps that you point out as well as the ratio of the power and numbers that are hunting to put them out of business to their own numbers. In many ways it is similar to a guerrilla war where many of the advantages are actually held by the tiny band of insurgents, who, greatly outnumbered and out-gunned, can in fact change history. The Swiss know this and train their military based on this. Do not be surprised if the dissidents of all stripes use improvisation based on malware and other tools like onion routing to further their causes and evade suppression. BTW, while I do not think all dissidents are righteous or fighting for righteous causes this does negate the general idea. A hammer is a hammer. Good or evil is independent of the tools, it depends on what one is pounding, nails or heads. Best, Allen - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Jan 12, 2008 9:32 AM, Alex Alten [EMAIL PROTECTED] wrote: Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. ... That's a rather large and distinctly dangerous assumption. Here's the IETF's official line on the question, the abstract section of RFC 2084: The Internet Engineering Task Force (IETF) has been asked to take a position on the inclusion into IETF standards-track documents of functionality designed to facilitate wiretapping. This memo explains what the IETF thinks the question means, why its answer is no, and what that answer means. http://www.faqs.org/rfcs/rfc2804.html The whole question was extensively discussed on an IETF mailing list set up for the purpose before that RFC was written: http://www1.ietf.org/mail-archive/web/raven/current/index.html The aptly named RFC 1984 is also relevant. Among the more obvious problems are the fact that complexity is bad for security, that the US government has some history of abusing wiretaps, and that other governments who would have access to any such technology are even less trustworthy. -- Sandy Harris, Nanjing, China - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Fri, 11 Jan 2008 17:32:04 -0800 Alex Alten [EMAIL PROTECTED] wrote: Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. For example, using a Verisign ICA certificate to do MITM of SSL, or possibly requiring Ebay to provide some sort of legal access to Skype private keys. ... This train left the station a *long* time ago. So it's not so clear that the train has even left the station. You've given a wish list but you haven't explained why you think it will happen. The US government walked away from the issue years ago, when the Clipper chip effort failed. Even post-9/11, the Bush administration chose not to revisit the question. The real issue, though, is technical rather than political will. CALEA is a mandate for service providers; key escrow is a requirement on the targets of the surveillance. The bad guys won't co-operate... --Steve Bellovin, http://www.cs.columbia.edu/~smb - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
From: Alex Alten [EMAIL PROTECTED] Writing in support of CALEA capability to assist prosecuting botnet operators etc ... Generally any standard encrypted protocols will probably eventually have to support some sort of CALEA capability. So you havn't heard that the UK has closed down the National High-Tech Crime Unit and the current way to report computer crime is at your police station (good luck with that). And there's not much sign of anyone else doing much better. Here's some recent news: http://www.news.com/8301-10784_3-9848743-7.html Leaving aside the points others have made about how you can't expect the cooperation of the crooks you are supposedly aiming for what staggers me is that after 9 years on this list you still think the government - any government - is looking out for your interests. Also why is this thread called Death of antivirus? What examples can anyone give me in corporate or mass-market IT of people stopping doing something merely because it didn't work? - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Perry E. Metzger wrote: I think Steve is completely correct in the case of cryptography. We have a lot of experience of real world security failures these days, and they're not generally the sort that crypto would fix. They are the sort that a different sort of way of using crypto could fix. Jason: Authentication is exactly what I need in the case of spam/phishing: Perry E. Metzger wrote: People have said that for quite some time. However, I doubt it would actually help. In the case of spam, all that would end up happening is vast amounts of CPU time being spent demonstrating that the made up addresses on spam were associated with actual RSA keys. (There is no practical limit to the number of RSA keys that may be generated.) First, the phishing case: Assume that instead of logging in through a possibly hostile web page, people login using SRP built into the browser chrome. Then phishing goes away, because the man in the middle gets no shared secrets. Next, the spam case, including spam offering high yield investments, spam promising millions of dollars stolen from starving Africans, Indian made viagra, porn sites, and two hundred and seventy tons of sugar. To fix spam, we need automatic whitelisting plus aggressive Baysian filtering. At present this works fine, no crypto needed, because the attacker seldom bothers to adapt to your particular profile. Tons of spam descend upon me, and is magically banished, sight unseen. When impersonation spam attacks become a serious problem, then we will think about how to use cryptography to beat them. Sometimes I have to manually whitelist people, which Grandma could not do, but that is a user interface problem - observe that most IM systems make whitelisting easy enough for Grandma. I would actually agree that we can implement operating system strategies that make malware harder to write. I don't know if it is likely that any current techniques, even including the nearly unheard of use of formal verification, would actually eliminate malware. OLPC seems very nearly malware proof. Malware would require unusual privileges, and there is no easy way to install software that requires unusual privileges on OLPC. - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Crypto solves certain problems very well. Against others, it's worse than useless -- worse, because it blocks out friendly IDSs as well as hostile parties. Yawn. IDS is dead, has been for a while now. The bottom line discovery has been that: 1) Anomaly detection doesn't work because anomalies are normal, and 2) Unless you're scrubbing up and down the application and network stacks, you just have no idea what the host endpoint is parsing. At the point where crypto shows up, it's already too late. --Dan - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
At 11:23 PM 1/3/2008 +, Steven M. Bellovin wrote: On Thu, 03 Jan 2008 11:52:21 -0500 [EMAIL PROTECTED] wrote: The aspect of this that is directly relevant to this list is that while we have labored to make network comms safe in an unsafe transmission medium, the world has now reached the point where the odds favor the hypothesis that whomever you are talking to is themselves already 0wned, i.e., it does not matter if the comms are clean when the opponent already owns your counterparty. Right -- remember Spaf's famous line about how using strong crypto on the Internet is like using an armored car to carry money between someone living in a cardboard shack and someone living on a park bench? Crypto solves certain problems very well. Against others, it's worse than useless -- worse, because it blocks out friendly IDSs as well as hostile parties. I agree with these statements. I have a couple of comments regarding crypto and IDS. I think that we will have to move toward encrypting more data at rest in some manner that is that is easy for the user to use (like ATM cash cards) yet difficult for a malicious piece of software on the user's machine to circumvent. This will require that all PC's ship with a trusted hardware/firmware chip AKA a reference monitor on the motherboard that can safely handle any red keys. This also means the PC needs a trusted path to the user like the pin pad in ATM machines. Many laptops now ship with fingerprint scanners, so maybe these things are not such an onerous requirement on PC manufacturers anymore. Also the reference monitor could be used to prevent viruses being able to completely taking over the user's machine (maybe at least to maintain some sort of host IDS capability). For IDS, I think we need to think of it in more the context of policing. These virus writers are human beings, and I suspect for the most part a very small fraction of the total Internet population. We need to have tools and international Interpol-like treaties in place that allow police to track down and arrest these people (or deny them access via an ISP or a carrier). Many of the tier 1 carriers apparently are refusing to share IDS information with one another. This needs to change. We need really good IDS tools that track down the control lines of the botnets, etc., back to their actual handlers. This may mean that each carrier must archive large amounts of either netflow data or even raw packets (say for non-TCP traffic) so that detailed L7 analysis can take place to track botnet control lines back to their handlers in after-the-fact investigations. Also, I hate to say this, we may need to also require that all encrypted traffic allow inspection of their contents under proper authority (CALEA essentially). If we can do this then we can put real policing pressure on these virus writers, essentially removing them from being able to attack us over the Internet. - Alex -- Alex Alten [EMAIL PROTECTED] - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Dec 31, 2007, at 4:46 PM, Bill Frantz wrote: My favorite virtual machine use is for the virus to install itself as a virtual machine, and run the OS in the virtual machine. This technique should be really good for hiding from virus scanners. It's not, and despite the press handwaving about hypervisor rootkits being the death of all security as we know it, this attack is largely uninteresting in practice. Repeat after me: it's not a real problem, and it's unlikely to become a real problem. A walkthrough with pretty pictures, courtesy of the Matasano folk: http://www.matasano.com/log/930/side-channel-detection-attacks-against-unauthorized-hypervisors/ Cheers, -- Ivan Krstić [EMAIL PROTECTED] | http://radian.org - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
virtualizaton and security cfp (was Re: Death of antivirus software imminent)
With this discussion of virtualization and security, it might be a good time to note: IEEE Security Privacy Special issue on virtualization September/October 2008 Deadline for submissions: 6 February 2008 Visit www.computer.org/portal/pages/security/author.xml to submit a manuscript Guest editors: Samuel T. King (UIUC), Sean W. Smith (Dartmouth) Virtualization has several properties that make it useful for security applications. Traditional virtual machine monitors aspire to enforce strong isolation among multiple operating systems (OSes) running on the same physical hardware, enable software services to be implemented below the OS at a layer usually only accessible by hardware, and provide low-level software with convenient abstractions of the virtual machineís hardware resources. Other approaches aspire to provide multiple virtual but isolated images of the same OS installation. These properties helped foster a new class of virtual-machine- based security services and made virtualization a staple of many enterprise computing environments. A common topic in the early days of computing, virtualization has recently seen a resurgence of commercial and research interest. Consequently, the security implications of virtualization technology are the topic of the Sept./Oct. 2008 special issue of IEEE Security Privacy magazine. We are looking for feature articles with an in-depth coverage of topics related to virtualization technology and how it applies to security. Among the potential topics are: --Virtualization for intrusion detection --Virtualization for forensic analysis of compromised computer systems --Virtualization for analyzing malicious software --Hardware support for secure virtualization --Security interfaces between VMMs and operating systems --Securing applications using virtualization --Securing attacks using virtualization --Security analysis of virtualization The above list is neither complete nor closed. Authors are encouraged to submit articles that explore other aspects of virtualization and its application to security. Submissions will be subject to the peer-review methodology for refereed papers. Articles should be understandable to a broad audience of people interested in security and privacy. The writing should be down to earth, practical, and original. Authors should not assume that the audience will have specialized experience in a particular subfield. All accepted articles will be edited according to the IEEE Computer Society style guide. - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Leichter, Jerry wrote: Virtualization has become the magic pixie dust of the decade. When IBM originally developed VMM technology, security was not a primary goal. People expected the OS to provide security, and at the time it was believed that OS's would be able to solve the security problems. re: http://www.garlic.com/~lynn/aadsm28.htm#4 Death of antivirus software iminent http://www.garlic.com/~lynn/aadsm28.htm#6 Death of antivirus software iminent http://www.garlic.com/~lynn/aadsm28.htm#8 Death of antivirus software iminent the other claim was that it was assumed that basic systems were built to be secure, so it would have been quite foreign idea it would be necessary to build a secure specific system. besides the referenced fairly wide use of gov and commercial institutions requiring high integrity systems ... the early virtual machine systems (cp67 and vm370) were also used by commercial time-sharing service bureaus. most of these created cms padded cell modifications, a lot of it was to prevent users from damaging themselves (as opposed to the underlying security that prevented uses from damaging the system and/or each other). at least some of these services provided online, concurrent services to (competitive) wall street firms ... who would be using the online services for highly sensitive financial activities (as example of integrity requirements). a little related x-over from posting in this thread http://www.garlic.com/~lynn/2008.html#14 hacked TOPS-10 monitors - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Today's VMMs aren't even designed to fit the formal criteria for a VMM (at least as expressed, intelligently, by Popek and Goldberg back in the 70s). VMM-aware malware leverages this: for example, by making calls to VMware's backdoor communications channel from the guest (ie. jerry.c). If the equivalence principle were actually upheld, this wouldn't be possible-- but then again, users wouldn't have all those handy features like cut-n-paste from guest to host. Sherri Leichter, Jerry wrote: Virtualization has become the magic pixie dust of the decade. When IBM originally developed VMM technology, security was not a primary goal. People expected the OS to provide security, and at the time it was believed that OS's would be able to solve the security problems. As far as I know, the first real tie of VMM's to security was in a DEC project to build a VMM for the VAX that would be secure at the Orange Book A2 level. The primary argument for this was: Existing OS's are way too complex to verify (and in any case A2 required verified design, which is impossible to apply to an already-existing design). A VMM can be small and simple enough to have a verified design, and because it runs under the OS and can mediate all access to the hardware, it can serve as a Reference Monitor. The thing was actually built and met its requirements (actually, it far exceeded some, especially on the performance end), but died when DEC killed the VAX in favor of the Alpha. Today's VMM's are hardly the same thing. They are built for perfor- mance, power, and managability, not for security. While certainly smaller than full-blown Windows, say, they are hardly tiny any more. Further, a major requirement of the VAX VMM was isolation: The different VM's could communicate only through network protocols. No shared devices, no shared file systems. Not the kind of thing that would be practical for the typical uses of today's crop of VM's. The claim that VMM's provide high level security is trading on the reputation of work done (and published) years ago which has little if anything to do with the software actually being run. Yes, even as they stand, today's VMM's probably do provide better security than some - many? - OS's. Using a VM as resettable sandbox is a nice idea, where you can use it. (Of course, that means when you close down the sandbox, you lose all your state. Kind of hard to use when the whole point of running an application like, say, an editor is to produce long-lived state! So you start making an exception here, an exception there ... and pretty soon the sand is spilled all over the floor and is in your eyes.) The distinction between a VMM and an OS is fuzzy anyway. A VMM gives you the illusion that you have a whole machine for yourself. Go back a read a description of a 1960's multi-user OS and you'll see the very same language used. If you want to argue that a small OS *can be* made more secure than a huge OS, I'll agree. But that's a size distinction, not a VMM/OS distinction -- Jerry - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED] - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
however, another interpretation is that the defenders have chosen extremely poor position to defend ... and are therefor at enormous disadvantage. it may be necessary to change the paradigm (and/or find the high ground) in order to successfully defend. First, it is evident that the malware writers have reached a level of sophistication where stealth is more attractive than persistence, i.e., prey are sufficiently abundant that it does not matter if your code survives reboot -- you can always get a new machine soon enough. Second, as soon as one of these guys figures out how to hook the memory manager (which may already have happened), then the ability to find the otherwise in-core-only malware goes away as your act of scanning memory will be seen by the now-corrupted memory manager and the malware will be thus relocated as you search such that you are playing blindman's bluff without knowing that you are. Third, targetted malware does not defeat the AV paradigm technically, rather it defeats the business model as no AV company can afford to craft, test, and distribute signatures for any malware that does not already have, say, 50,000 victims. Fourth, under so-called Service-Oriented-Architecture, there is no one anywhere who knows where all the moving parts are. The aspect of this that is directly relevant to this list is that while we have labored to make network comms safe in an unsafe transmission medium, the world has now reached the point where the odds favor the hypothesis that whomever you are talking to is themselves already 0wned, i.e., it does not matter if the comms are clean when the opponent already owns your counterparty. I blogged on this recently (guest for Ryan Naraine) and it made the top of Slashdot. Apologies for boring those who've already seen it. --dan - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
[EMAIL PROTECTED] (Jason) on Wednesday, January 2, 2008 wrote: On the other hand, writing an OS that doesn't get infected in the first place is a fundamentally winning battle: OSes are insecure because people make mistakes, not because they're fundamentally insecurable. I fully agree that a better OS would go a long way toward helping in the battle. We even know some techniques for building a better OS. Consider plash http://sourceforge.net/projects/plash/, and Polaris http://www.hpl.hp.com/techreports/2004/HPL-2004-221.html, both of which run programs for a user with less than that user's privilege. This technique helps prevent viruses from infecting computers by denying them write privileges to system files and most of the user's files. The model that any program a user runs can do anything that user is permitted to do is fundamentally broken. It is the model that all current popular OSes support, so in that sense these OSes are insecure. The only mistake users make in many cases is running software with bugs such as buffer overruns, where the virus then uses the user's privileges to take over their system. In these cases, IMHO, blaming the user is inappropriate. And in all cases, OSes should give the user more support in making sound decisions. See for example: http://www.skyhunter.com/marcs/granmaRulesPola.html Cheers - Bill - Bill Frantz| The first thing you need when | Periwinkle (408)356-8506 | using a perimeter defense is a | 16345 Englewood Ave www.pwpconsult.com | perimeter. | Los Gatos, CA 95032 - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Thu, 03 Jan 2008 11:52:21 -0500 [EMAIL PROTECTED] wrote: The aspect of this that is directly relevant to this list is that while we have labored to make network comms safe in an unsafe transmission medium, the world has now reached the point where the odds favor the hypothesis that whomever you are talking to is themselves already 0wned, i.e., it does not matter if the comms are clean when the opponent already owns your counterparty. Right -- remember Spaf's famous line about how using strong crypto on the Internet is like using an armored car to carry money between someone living in a cardboard shack and someone living on a park bench? Crypto solves certain problems very well. Against others, it's worse than useless -- worse, because it blocks out friendly IDSs as well as hostile parties. --Steve Bellovin, http://www.cs.columbia.edu/~smb - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Dec 29, 2007, at 6:37 PM, Anne Lynn Wheeler wrote: Virtualization still hot, death of antivirus software imminent My favorite virtual machine use is for the virus to install itself as a virtual machine, and run the OS in the virtual machine. This technique should be really good for hiding from virus scanners. Cheers - Bill --- Bill Frantz| I like the farmers' market | Periwinkle (408)356-8506 | because I can get fruits and | 16345 Englewood Ave www.pwpconsult.com | vegetables without stickers. | Los Gatos, CA 95032 - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Bill Frantz wrote: My favorite virtual machine use is for the virus to install itself as a virtual machine, and run the OS in the virtual machine. This technique should be really good for hiding from virus scanners. re: http://www.garlic.com/~lynn/aadsm28.htm#2 Death of antivirus software imminent http://www.garlic.com/~lynn/aadsm28.htm#4 Death of antivirus software imminent i commented on that in reference posts mentioning that there have been uses of virtual machines to study virus/trojans ... but that some of the new generation virus/trojans are now looking to see if they are running in virtual machine (studied?). some of the current trade-off is whether that virtual machine technology can be used to partition off basically insecure operations (which are widely recognized as being easy to compromise) and then completely discard the environment and rebuild from scratch after every session (sort of the automated equivalent of having to manually wipe an infected machine and re-install from scratch). the counter argument is that crooks can possibly also use similar technology to hide ... once they have infected the machine. the current issue is that a lot of the antivirus/scanning techniques are becoming obsolete w/o the attackers even leveraging virtual machine technology. The attackers can leverage the technology in an otherwise poorly defended machine. Some years ago there was a product claiming that it could operate even at a public access machine because of their completeness of their antivirus countermeasures ... even on an infected machine. I raised the issue that it would be trivial to defeat all such countermeasures using virtual machine technology. Somewhat of a skirmish resulted since they had never considered (or heard of) virtual machine technology ... for all i know there is still ongoing head-in-the-sand situation. for little topic drift ... this blog entry: https://financialcryptography.com/mt/archives/000991.html and http://www.garlic.com/~lynn/aadsm28.htm#3 http://www.garlic.com/~lynn/aadsm28.htm#5 there is some assertion that the crooks overwhelming the defenders countermeasures because they are operating significantly faster and more efficiently. however, another interpretation is that the defenders have chosen extremely poor position to defend ... and are therefor at enormous disadvantage. it may be necessary to change the paradigm (and/or find the high ground) in order to successfully defend. - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
There was a paper in IEEE Security Privacy 2006 by Sam King on how to do this kind of attack (his system was called SubVirt): http://www.eecs.umich.edu/virtual/papers/king06.pdf However, in practice it turns out this is a much harder than people think. See Tal Garfinkel's paper on precisely this topic at HotOS 2007: http://www.stanford.edu/~talg/papers/HOTOS07/abstract.html -Angelos On Jan 2, 2008, at 1:09 PM, Anne Lynn Wheeler wrote: Bill Frantz wrote: My favorite virtual machine use is for the virus to install itself as a virtual machine, and run the OS in the virtual machine. This technique should be really good for hiding from virus scanners. re: http://www.garlic.com/~lynn/aadsm28.htm#2 Death of antivirus software imminent http://www.garlic.com/~lynn/aadsm28.htm#4 Death of antivirus software imminent i commented on that in reference posts mentioning that there have been uses of virtual machines to study virus/trojans ... but that some of the new generation virus/trojans are now looking to see if they are running in virtual machine (studied?). some of the current trade-off is whether that virtual machine technology can be used to partition off basically insecure operations (which are widely recognized as being easy to compromise) and then completely discard the environment and rebuild from scratch after every session (sort of the automated equivalent of having to manually wipe an infected machine and re-install from scratch). the counter argument is that crooks can possibly also use similar technology to hide ... once they have infected the machine. the current issue is that a lot of the antivirus/scanning techniques are becoming obsolete w/o the attackers even leveraging virtual machine technology. The attackers can leverage the technology in an otherwise poorly defended machine. Some years ago there was a product claiming that it could operate even at a public access machine because of their completeness of their antivirus countermeasures ... even on an infected machine. I raised the issue that it would be trivial to defeat all such countermeasures using virtual machine technology. Somewhat of a skirmish resulted since they had never considered (or heard of) virtual machine technology ... for all i know there is still ongoing head-in-the-sand situation. for little topic drift ... this blog entry: https://financialcryptography.com/mt/archives/000991.html and http://www.garlic.com/~lynn/aadsm28.htm#3 http://www.garlic.com/~lynn/aadsm28.htm#5 there is some assertion that the crooks overwhelming the defenders countermeasures because they are operating significantly faster and more efficiently. however, another interpretation is that the defenders have chosen extremely poor position to defend ... and are therefor at enormous disadvantage. it may be necessary to change the paradigm (and/or find the high ground) in order to successfully defend. - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED] - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Virtualization has become the magic pixie dust of the decade. When IBM originally developed VMM technology, security was not a primary goal. People expected the OS to provide security, and at the time it was believed that OS's would be able to solve the security problems. As far as I know, the first real tie of VMM's to security was in a DEC project to build a VMM for the VAX that would be secure at the Orange Book A2 level. The primary argument for this was: Existing OS's are way too complex to verify (and in any case A2 required verified design, which is impossible to apply to an already-existing design). A VMM can be small and simple enough to have a verified design, and because it runs under the OS and can mediate all access to the hardware, it can serve as a Reference Monitor. The thing was actually built and met its requirements (actually, it far exceeded some, especially on the performance end), but died when DEC killed the VAX in favor of the Alpha. Today's VMM's are hardly the same thing. They are built for perfor- mance, power, and managability, not for security. While certainly smaller than full-blown Windows, say, they are hardly tiny any more. Further, a major requirement of the VAX VMM was isolation: The different VM's could communicate only through network protocols. No shared devices, no shared file systems. Not the kind of thing that would be practical for the typical uses of today's crop of VM's. The claim that VMM's provide high level security is trading on the reputation of work done (and published) years ago which has little if anything to do with the software actually being run. Yes, even as they stand, today's VMM's probably do provide better security than some - many? - OS's. Using a VM as resettable sandbox is a nice idea, where you can use it. (Of course, that means when you close down the sandbox, you lose all your state. Kind of hard to use when the whole point of running an application like, say, an editor is to produce long-lived state! So you start making an exception here, an exception there ... and pretty soon the sand is spilled all over the floor and is in your eyes.) The distinction between a VMM and an OS is fuzzy anyway. A VMM gives you the illusion that you have a whole machine for yourself. Go back a read a description of a 1960's multi-user OS and you'll see the very same language used. If you want to argue that a small OS *can be* made more secure than a huge OS, I'll agree. But that's a size distinction, not a VMM/OS distinction -- Jerry - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
Anne Lynn Wheeler wrote: Virtualization still hot, death of antivirus software imminent, VC says http://www.networkworld.com/news/2007/121707-crystal-ball-virtualization.html Interesting how virtualization seems to imply safe in the public mind (and explicitly in that article) right now I'm sure with the increasing use of virtualization, we'll start to see more VMware-aware malware and virtual machine escapes in the wild. Another example of putting many, many eggs in the same basket. Here's a good article about the first public VMware escape, which Intelguardians demonstrated at SANSFIRE this summer: (Note: I'm biased, having worked on this project.) http://www.pauldotcom.com/2007/07/ What boggles my mind is that despite this, the DoD has still decided to rely on virtualization software to keep classified and unclassified info on the same physical systems: http://www.internetnews.com/storage/article.php/3696996 Sherri Anne Lynn Wheeler wrote: re: Storm, Nugache lead dangerous new botnet barrage http://searchsecurity.techtarget.com/originalContent/0,289142,sid14_gci1286808,00.html from above: The creators of these Trojans and bots not only have very strong software development and testing skills, but also clearly know how security vendors operate and how to outmaneuver defenses such as antivirus software, IDS and firewalls, experts say. They know that they simply need to alter their code and the messages carrying it in small ways in order to evade signature-based defenses. Dittrich and other researchers say that when they analyze the code these malware authors are putting out, what emerges is a picture of a group of skilled, professional software developers learning from their mistakes, improving their code on a weekly basis and making a lot of money in the process. ... snip ... ... and somewhat related Virtualization still hot, death of antivirus software imminent, VC says http://www.networkworld.com/news/2007/121707-crystal-ball-virtualization.html from above: Another trend Maeder predicts for 2008 is, at long last, the death of antivirus software and other security products that allow employees to install and download any programs they'd like onto their PCs, and then attempt to weed out the malicious code. Instead, products that protect endpoints by only allowing IT-approved code to be installed will become the norm. ... snip ... and post about dealing with compromised machines http://www.garlic.com/~lynn/2007u.html#771 folklore indeed mentioning sophistication in other ways: Botnet-controlled Trojan robbing online bank customers http://www.networkworld.com/news/2007/121307-zbot-trojan-robbing-banks.htm from above: If the attacker succeeds in getting the Trojan malware onto the victim's computer, he can piggyback on a session of online banking without even having to use the victim's name and password. The infected computer communicates back to the Trojan's command-and-controller exactly which bank the victim has an account with. It then automatically feeds code that tells the Trojan how to mimic actual online transactions with a particular bank to do wire transfers or bill payments ... snip ... there have been some number of online banking countermeasures for specific kinds of system compromises like keyloggers ... but they apparently didn't bother to get promises from the crooks to only limit the kinds of attacks to those exploits. some related comments on such compromised machines http://www.garlic.com/~lynn/aadsm27.htm#66 2007: year in review http://www.garlic.com/~lynn/aadsm28.htm#0 2007: year in review - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED] - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
Re: Death of antivirus software imminent
On Dec 29, 2007, at 6:37 PM, Anne Lynn Wheeler wrote: Virtualization still hot, death of antivirus software imminent My, that sounds awfully familiar: http://radian.org/~krstic/talks/2007/auscert/slides.pdf I note that, come the January OLPC software update, I will be using my XO laptop for all my e-banking and related needs. It provides a drastically more secure platform for doing so than any mainstream computer I know exists. -- Ivan Krstić [EMAIL PROTECTED] | http://radian.org - The Cryptography Mailing List Unsubscribe by sending unsubscribe cryptography to [EMAIL PROTECTED]
